hybridfree/eevblog-posts huggingface dataset:
Altium designer airwires  - Page 1
Forum section: electronics / beginners

author: Simbarashe Bryne Chipembe
author_rank: Contributor
timestamp: March 22, 2017, 12:22:13 pm
content: Hi guys, please help me out here. So I cannot understand why those airwires/ unconnected wires wont go away after I complete the routing? Plus the look wierd! Am new to altium designer but I have made one single sided board and the airwires were perfectly normal .... straight without the parallel breaks. Please help

author: richard.cs
author_rank: Super Contributor
timestamp: March 22, 2017, 07:23:21 pm
content: Run a DRC check and they should all disappear (unless some are still unrouted). They're errors from the last DRC and don't disappear until either rechecked or explicitly cleared. Rechecking is better as you notice if something doesn't connect.
Altium designer double diode - Page 1
Forum section: electronics / beginners

author: mika
author_rank: Newbie
timestamp: May 13, 2016, 06:26:17 pm
content: Hi All,I'm new in the forum i would like to learn with us, so lets go.any body knows, how i can install one library in Altium designer, who contains the one Double diode, in the encapsulation TO-220?Thanks.
Altium Designer: PCB Footprint - Page 1
Forum section: electronics / beginners

author: EmpJack
author_rank: Newbie
timestamp: October 11, 2022, 07:53:54 pm
content: Hello lads,I was hoping to get some help on something that I think is very basic but I seem to be failing at it. I'm designing a PCB on Altium Designer and I'm using Phil's lab as my base resource. As I was finishing the schematic, I moved on to the footprint and I got a bunch of "Footprint of component not found" which I ignored for the time being. I was able to make a ton of progress until I came across my first "missing footprint". So here's what I did:I went to YouTube and looked up how to add a device onto Altium that isn't in its library yet. I found this:The device that was missing was a USB C: USB31-TYPEC-32X41-XFSI got the footprint from EasyEDA and was able to get a file that ends in ".schdoc". The problem is that when I begin placing/routing the components, the USBC did not have a footprint.I opened the properties tab and saw no model was available, so I got a file ".pcbdoc", which is a 3D model of the device, and I tried adding it to the footprint using the add footprint in the properties.The problem is I can't find the .pcbdoc file and it sends me to a library which is not where I need to go.I know I'm doing something wrong, but w/o being told explicitly where, I'm pretty much stuck.If someone would kindly point me to a youtube video where I can just upload the device to altium without messing with the footprint, that would be awesome. If I have to design the footprint myself I can do that as well it would just take some time but I'd rather not.Thank you very much!Below are pics detailing my progress:

author: strawberry
author_rank: Super Contributor
timestamp: October 11, 2022, 08:09:19 pm
content: here is dedicated section for Altiummake schematic lib symbol - make pcb lib footprint - place 3D model (.step) - link footprint to sch symbol
Altium Designer Solidworks collaboration - Page 1
Forum section: electronics / beginners

author: xtr0d3m0n
author_rank: Newbie
timestamp: November 27, 2016, 01:37:42 pm
content: Hey Guys!!! SO after a day dickin around I finally installed Altium Solidworks collaborations ...but when I pull the design from the svn repository ..nothing happens and this error appears ....anybody experienced this??? Any help would be appreciated....Thanks in advance.
Altium help for newbie. Help needed to find 5V DC barrel Jack component - Page 1
Forum section: electronics / beginners

author: Gurpreet
author_rank: Contributor
timestamp: November 11, 2015, 02:33:09 am
content: Hello guys.!!I started using Altium designer 14. How to find the libraries of the components other than the comapnies that altium provides. For example, I am looking for a 5V Barrel DC jack. But I could not find it. Is there a special way to do the search on altium that I did not come across.??Help people..!!

author: Gurpreet
author_rank: Contributor
timestamp: November 11, 2015, 02:40:02 am
content: Quote from: blueskull on November 11, 2015, 02:37:02 amThis is World Of Internet , you don't need subscription to use Altium if you really want to!!!!

author: Gurpreet
author_rank: Contributor
timestamp: November 11, 2015, 02:46:51 am
content: Hmmm..!!! Ohkk!!What software do you use by the way?

author: Gurpreet
author_rank: Contributor
timestamp: November 11, 2015, 02:51:28 am
content: Do you know of any link to some videos to start off with altium smoothly!?? what was your approach while learning altium??

author: Gurpreet
author_rank: Contributor
timestamp: November 11, 2015, 02:57:29 am
content: hmm.. now I can feel the complexity of altium ..!!
Altium on Parallels Access - Page 1
Forum section: electronics / beginners

author: bckybarnes
author_rank: Newbie
timestamp: May 06, 2016, 03:41:46 am
content: Hi. I'm trying to download Altium designer onto my MacBook but it's not able to run. So I've downloaded Parallels to do that, but I have no actual clue on how to use Parallels Access and I was wondering if someone could guide me through it?

author: mettlerr
author_rank: Unknown
timestamp: May 06, 2016, 08:35:35 am
content: Parallels Access I think is not what you need. Parallels Access is used to connect from a remote location to your Mac and display applications running on it (Windows and Mac apps), like Remote Desktop for Windows. You still need a virtual Windows environment on your Mac if you want to use Parallels Access.I think this is what you need:http://www.parallels.com/products/desktop/Or, from VMware:http://vmware.com/products/fusion/EDIT: Or, this OpenSource solution:https://www.virtualbox.orgAnd: You will need a Windows Licenses to be able to legally run Windows on your Mac.

author: Aeternam
author_rank: Unknown
timestamp: May 06, 2016, 05:04:57 pm
content: Before buying Parallels you also want to check if Altium is able to run in a virtual box; some (usually high cost) software packages refuse to run if they detect that they are installed in a virtualization environment. A quick google should tell you that.

author: Bud
author_rank: Super Contributor
timestamp: May 06, 2016, 06:13:34 pm
content: To my experience Altium Versions newer than 14 will not run properly in Oracle VirtualBox. Older versions including v14 run ok. Altium requires specific graphics capabilities which vm platform may not be able provide.
Altium PCB Update discrepancy - Schematics to PCB - Page 1
Forum section: electronics / beginners

author: Freshman
author_rank: Regular Contributor
timestamp: March 05, 2025, 02:45:20 pm
content: The Altium project contains both schematic and PCB designs. After implementing minor updates to the schematic, the "Design -> Update Schematics to PCB" function was executed, generating a few Engineering Change Orders (ECOs), which were addressed, and the PCB update was completed successfully.However, when the updated design file is opened in an older version of Altium and the "Design -> Update Schematics to PCB" function is run, no ECOs are generated. Conversely, when the file is opened in the newer version of Altium and the same function is executed, some ECOs are generated, specifically related to "Add Rules" for power supply and ground nets in the schematic.Could you provide insight into why this discrepancy occurs and how to resolve it?

author: tszaboo
author_rank: Super Contributor
timestamp: March 05, 2025, 04:47:13 pm
content: You should fix the component links, and try again. There is something for it in the menu of the PCB design window.

author: ahsrabrifat
author_rank: Regular Contributor
timestamp: March 14, 2025, 06:57:41 am
content: If team members are using multiple Altium versions, it might be beneficial to standardize on a single version to avoid inconsistencies.
Altium Sam4e board - Page 1
Forum section: electronics / beginners

author: hsn93
author_rank: Regular Contributor
timestamp: January 23, 2018, 12:01:51 pm
content: hello, im looking into pcb design ofSAM4E Xplain boardusing Altiumim looking into can transiever i saw a via that goes to 3v3 net ..however my question is in altium, i cant trace the net that is connected to the via .. ?there is via here but why i cant see any trace connected to it from another layer?

author: hsn93
author_rank: Regular Contributor
timestamp: January 25, 2018, 07:29:31 am
content: another questions:why there is via connected to the path of xout track ..finally why altium doesnt recognize (NetJ302_1) net with (XOUT) net as 1 net .. ?http://ww1.microchip.com/downloads/en/DeviceDoc/SAM4E-Xplained-Pro_Design-Documentation.zipdesign file for reference ..
ALU effective schematic design advice - Page 1
Forum section: electronics / beginners

author: Lucky-Luka
author_rank: Unknown
timestamp: July 25, 2020, 08:40:54 pm
content: Hi allI would like to make an arithmetic logic unit using discrete logic chips as an educational project.Since the project has repeated modules, is there a way to optimize the design?Thanks

author: rstofer
author_rank: Super Contributor
timestamp: July 26, 2020, 02:57:00 am
content: Maybe the schematic for the 74181 ALU will helphttps://en.wikipedia.org/wiki/74181

author: ledtester
author_rank: Super Contributor
timestamp: July 26, 2020, 03:23:58 am
content: If you want to actually use it in a custom CPU implementation you might consider just using an EEPROM:https://minnie.tuhs.org/Programs/CrazySmallCPU/https://www.youtu.be/BA12Z7gQ4P0https://www.reddit.com/r/beneater/comments/cky3g8/my_eeprom_alu/For a minimal discrete ALU that can get work done, have a look at the design of the Gigatron:https://gigatron.io/and for more ideas:https://www.homebrewcpuring.org/
Aluminum as a conductor - Page 1
Forum section: electronics / beginners

author: JoeN
author_rank: Frequent Contributor
timestamp: January 15, 2018, 01:35:09 am
content: This is more an electrical question than an electronics question, but please humor me.I know aluminum is used as a conductor in certain circumstances and that pure aluminum is the fourth best conductor of electricity among all known elements and compounds at room temperature, and it's far cheaper than copper.The problem is that the oxide that aluminum forms is an insulator. This causes problems with wiring, but you still see it sometimes, and also aluminum busbars.What confuses me is how aluminum can be used even for those purposes since it quickly forms an oxide and we all live in an oxygen atmosphere. How are contacts created between one conductor (say a copper wire to distribute power from the busbar) and an aluminum conductor such as a busbar, so that no oxide forms in the junction of those two conductors. Any oxide there would have serious implications for that circuit, right? I am thinking of this as the "last micron" problem. Aluminum is great until it hits that aluminum oxide. How is that last micron of oxide suppressed?

author: CatalinaWOW
author_rank: Super Contributor
timestamp: January 15, 2018, 01:40:33 am
content: The secret is that last micron. It is thin enough to mechanically break and abrade when terminals are screwed down to aluminum wires. And then the deformation of the metals involved seals the area off from oxygen so the barrier can't form again.This isn't perfect (nothing is). If the screws are not aluminum (which is very frequent), and/or the wire is not aluminum there will be differences in thermal expansion, and temperature changes will tend to let oxygen in and degrade the contacts.

author: Nerull
author_rank: Frequent Contributor
timestamp: January 15, 2018, 01:40:38 am
content: When aluminum is used as a conductor it is common to plate it with some other metal, which prevents an oxide layer from forming. If you have good metal to metal contact, such as in a crimp, there will be no way for an oxide layer to grow between the aluminum and the metal in any case - they will essentially be cold welded. This requires starting with an oxide free surface, though.Tin and silver plating are both common for aluminum bus bar contact areas.

author: rstofer
author_rank: Super Contributor
timestamp: January 15, 2018, 01:43:33 am
content: Most unit substations use aluminum busbars and have done so for many decades. And they're still in service...We use an anti-oxidant past like:https://www.homedepot.com/p/Ideal-NOALOX-4-oz-Anti-Oxidant-Compound-30-026/202276208The paste is also used in crimp-on terminations and sometimes on clamp connections (like circuit breakers). I prefer to use an aluminum crimp to copper pigtail for circuit breaker connections.https://www.gordonelectricsupply.com/index~text~6065005~path~product~part~6065005~ds~dept~process~searchThere are many connection schemes that are UL approved for Cu/Al. They all work.
Aluminum Electrolytic Capacitor - Dielectric Reforming - Page 1
Forum section: electronics / beginners

author: PaulJF
author_rank: Newbie
timestamp: October 30, 2019, 03:27:31 pm
content: HiI've been doing some research on the mechanisms of liquid-electrolyte based aluminium electrolytic capacitors. I was hoping for a sounding board to confirm whether or not the things I've learned make sense or not. I also had some questions about reverse-bias conditions.So, I believe an aluminum electrolyte capacitor with liquid-based electrolyte is constructed via:An anodic aluminum foil with etched surfaceA cathodic aluminum foilA spacer, often paper, soaked in proprietary electrolyte mixtureA thin, naturally occurring layer of aluminum oxide on both aluminum foils due to galvanic reaction between the foils and the working electrolyteA "manufactured" dielectric, commonly Aluminum Oxide (but can be different?), induced via applying positive voltage to anode foil and negative voltage to cathode foil causing oxidization between the anode foil and electrolyte, and is attached to the etched surface on the anode foilI also understand that the working electrolyte, and the electrolyte used to manufacture the core dielectric on the anode foil are different.The way I understand these processes work, is that the dielectric can be reformed indefinitely so long as it's done carefully. I.E., Apply low current with slowly increasing voltage levels. Is this true?The slower, methodical process of reforming dielectrics are for capacitors which have almost essentially depleted their oxide layers. I understand that if voltage is applied periodically, then a methodical process of dielectric reforming isn't needed as the periodically applied voltages would be enough for the working electrolyte + aluminum foil to "heal" the few impurities in the dielectric. To me, the applied voltage required to induce the self-healing processmustbe rated voltage, otherwise the dielectric would not be restored to factory conditions. Is this true, what are your thoughts?Why, in reverse-bias, does a significant aluminum oxide layer not form on the "cathode" foil? Is it because there is no etching on the foil to collect enough aluminum oxide and create a strong enough dielectric? I feel as though every one of these polarized capacitors could have been made bipolar if both of the foils were etched "correctly".Thanks in advance for your thoughts!I am excited to get a better understanding of what's going on.

author: mcovington
author_rank: Regular Contributor
timestamp: October 31, 2019, 05:05:25 am
content: My understanding is the following. I am not an expert.(1) The dielectric can be re-formed forever IF the capacitor never loses any of its moisture. That's why we have working 50-year-old capacitors, and also why so many old capacitors fail!(2) Reverse bias *does* form an insulating layer on the wrong electrode, reducing the performance of the capacitor.
Am I correct in this way Vds? - Page 1
Forum section: electronics / beginners

author: man1
author_rank: Contributor
timestamp: April 23, 2025, 05:18:39 am
content: I want to measure vds to get the junction temperature of the mos by the thermal electrical parameter method, now I add drive voltage 12v to my mos tube to drive it normally. The main power circuit add constant current 2a, my mos tube Rds 160mΩ, at this time measure mos tube vds=3v. why this vds is so big?isWhere is it?Where is the problemWhere is the problem?My mos tube model SCT3160KLGC11, power circuit load 1Ω, please help me answer thanks!

author: springburo
author_rank: Newbie
timestamp: August 04, 2025, 01:59:45 pm
content: lots of issues here. first the accuracy of the scope probes, and how well they are calibrated. Second is how the transistor is cooled. A factor of 10 difference suggests that the scope is set for the wrong probe attenuation
Am I correct in this way Vds? - Page 1
Forum section: electronics / beginners

author: man1
author_rank: Contributor
timestamp: April 22, 2025, 06:51:25 am
content: I want to measure vds to get the junction temperature of the mos by the thermal electrical parameter method, now I add drive voltage 12v to my mos tube to drive it normally. The main power circuit add constant current 2a, my mos tube Rds 160mΩ, at this time measure mos tube vds=3v. why this vds is so big?isWhere is it?Where is the problemWhere is the problem?
Am I dealing with NC pins or they are not NC?  - Page 1
Forum section: electronics / beginners

author: u666sa
author_rank: Frequent Contributor
timestamp: September 22, 2023, 12:38:59 pm
content: The question is why these pins are NC while in datasheet they are not NC?As you can see D9 is ripped. It looks to me like no contact. But in datasheet it says BASE_TRX_QP. C9 above it is BASE_TRX_QN.Baseband I 20Mhz debug I/O (positive)&Baseband I 20Mhz debug I/O (negative)Next to them at D8 & C8 are Baseband Q 20Mhz debug I/O (postive), connected via VIA at C8 & Baseband Q 20Mhz debug I/O (negative) at D8, also looking like no contact.Datasheet attached.Close ups.

author: thm_w
author_rank: Super Contributor
timestamp: September 22, 2023, 11:39:47 pm
content: Debug I/O. So its not needed for normal operation and might only be used for debugging.Presumably some intermediate digital signal.

author: amyk
author_rank: Super Contributor
timestamp: September 23, 2023, 01:36:40 am
content: NC means the pins have no connection to the die, but pins that do have a connection may not need to be connected to the circuit in a particular application of the IC.
Am I doing it right? - Page 1
Forum section: electronics / beginners

author: Yanagibashi
author_rank: Newbie
timestamp: July 12, 2019, 05:53:06 pm
content: I have been working on this design for the past few weeks and I want to be able to daisy chain 3 of these together to balance the batteries in my EV but i'm not sure if this will work. Any feedback is appreciated because i'm probably doing this wrong as it is my first time trying to design a complex circuit..Slave Rev10b.pdf(339.78 kB - downloaded 285 times.)
Am I misunderstanding how Buck converters function? - Page 1
Forum section: electronics / beginners

author: cbc02009
author_rank: Regular Contributor
timestamp: July 22, 2018, 01:55:02 pm
content: So I built a breadboard prototype of a buck converter I will be using as part of a larger project, but I'm not sure if the results I'm getting make sense, and I was hoping someone could sanity check for me, as the buck converter is stepping down the voltage just fine, but doesn't seem to be stepping up the current.The converter schematic is attached below. Both the VCC and the V_in are coming from a USB 5V supply. The PWM is supplied by an MCU.I think it has something to do with the load, since it's just a plain resistor, and I = V/R, so the load essentially dictates the current coming out of the converter. I get that the buck converter is useful because the output voltage will always be duty_cycle*V_in, regardless of the load (within reason), but I feel like either I made a mistake in the design for the efficiency to be so low, or there's just something fundamental that I'm missing.LTspice simulations match what I'm getting for results, as well, which makes me think I'm just not getting something. Apologies if it's something blatantly obvious that I'm missing.

author: Benta
author_rank: Super Contributor
timestamp: July 22, 2018, 02:15:40 pm
content: At only 4.6 mA out, the current used to just keep the circuit running is a large part of the input current. The efficiencies look OK to me. Try with a smaller load resistor and see what happens.

author: cbc02009
author_rank: Regular Contributor
timestamp: July 22, 2018, 05:39:45 pm
content: Quote from: Benta on July 22, 2018, 02:15:40 pmThank you, I reduced the load to 10ohms and the results are much closer to what I expected them to be.I definitely need a better power supply though, because you can see the voltage gets dragged down a lot with the increasing duty cycle.So why does the reduced load make so much difference? is it because it's closer to the internal resistance of the converter? Or is it something else?

author: Benta
author_rank: Super Contributor
timestamp: July 22, 2018, 06:18:41 pm
content: It's simply because the IC and MOSFET gates need power independent of the output current. If you remove the load resistor, your efficiency would drop to zero, but the circuit would still consume power.

author: cbc02009
author_rank: Regular Contributor
timestamp: July 22, 2018, 08:49:13 pm
content: Quote from: Benta on July 22, 2018, 06:18:41 pmSorry, I should have clarified, I'm only measuring the current going into V_in in both tests, not the current going into the chip.
Am I Reading My Counter Correctly? Help! - Page 1
Forum section: electronics / beginners

author: NT0Z
author_rank: Regular Contributor
timestamp: February 13, 2023, 02:05:28 am
content: Hi, gang,Got my GPSDO working solidly (outdoor antenna), and Lady Heather is quite pleased. (And if she's pleased, I am too.)I connected the 10-MHz sine wave reference signal to the ref input on my HP counter and began "counting" the various outputs of my AADE 1-Hz to 10-MHz TCXO frequency reference (running 24/7 for a week).Yes, long ago I had four semesters of calculus, and yes, I hate scientific notation.In that vein, I do not like how my HP counter displays most frequencies. But the price was right... And if Lady Heather can discipline, it was REALLY right.For the 10-MHz pic, which reads 9999.9981 kHz, if I slide the decimal point three places to the left, I come up with 9.999.998.1 MHz, which I think suggests that the AADE standard, after sitting in a box for eight years, is running 1.9 Hz low @ 10 MHz. Is that right?And for the 1 MHz pic, which reads 999.9999 kHz, is that a tenth of a Hz low -- or is it 1 Hz low at 1 MHz?These digit strings really tax my brain... Don't tell LH, cuz I don't want her to discipline me...Thanks,Kirk, NT0Z

author: xrunner
author_rank: Super Contributor
timestamp: February 13, 2023, 02:13:44 am
content: Quote from: NT0Z on February 13, 2023, 02:05:28 amYep.Quote0.1 Hz low - yesQuoteTwo beers and I can do it.

author: NT0Z
author_rank: Regular Contributor
timestamp: February 13, 2023, 02:22:07 am
content: Thanks. My math teacher is smiling down on me for not screwing that up!I'm so impressed with the build quality and accuracy (when disciplined or with a properly aligned internal reference) of this 1975 model HP counter. I bought it for $20 on CL. It sat in the trunk of my friend's car for four months, and then sat in my ham shack, without being powered, for eight years. The fan worked but had blown bearings. I replaced it for $16 -- nearly my original price for the entire unit! It has the GPIB and DVM modules which I probably won't need, and it doesn't have either of the prescalers, but I can build a prescaler or find the HP module on eBay if this thing hangs in there for a while (it's "new" to me and hasn't had its chance to "fail early.")Boy, they sure don't build 'em like that anymore. What a thing of beauty!--Kirk, NT0Z

author: xrunner
author_rank: Super Contributor
timestamp: February 13, 2023, 02:46:34 am
content: Quote from: NT0Z on February 13, 2023, 02:22:07 amYea hp is a great line of test equipment - I'm kinda partial to them myself, not that it's obvious.Now that it's got your GPSDO ext. ref input it's as good as gold. I'd power it up every day and admire it if I were you.
Am I suppose to be able to select the oscilloscopes maximum memory depth? - Page 1
Forum section: electronics / beginners

author: cvriv
author_rank: Frequent Contributor
timestamp: June 23, 2016, 12:52:18 am
content: I installed the upgraded license I received with the purchase of my oscilloscope and the oscilloscope said it was installed successfully, but when I was poking around I noticed that my memory depth only went to 28Mpts. I checked the installed options and I think everything is enabled. Am I missing something here? Am I just not understanding this correctly? I attached some pics.Also, are there more options available that I'm not aware about, that if I hacked this machine I would receive?

author: tautech
author_rank: Super Contributor
timestamp: June 23, 2016, 01:29:23 am
content: Total memory may be divided by the # of active channels.

author: rsjsouza
author_rank: Super Contributor
timestamp: June 23, 2016, 02:48:08 am
content: As tautech said. Your picture shows the two channels active and therefore the memory will be halved.

author: cvriv
author_rank: Frequent Contributor
timestamp: June 23, 2016, 02:49:27 am
content: Ok. Makes sense. Thanks.
Am Looking for 12Vdc battery to 240Vac Grid Tie Inverter - Page 1
Forum section: electronics / beginners

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 15, 2014, 06:29:03 pm
content: looking in ebay i mostly found "solar" to "grid" inverter which cannot be hooked directly to 12V LA battery as input sigh. here's what i want to do basically... i have storage battery that are charged externally, dont ask where from it can be anything solar, wind, sweat whatever. the point is, charging/storing to 12V battery is the crucial part. if while charging or not, when its decided the battery have enough juice (voltage check), the battery energy, including the "externally charging" energy (if any) will be feed to home grid to make electricity bill cheaper. if battery do not have enough juice, then inverter will turned off and the home will use normal mains grid power wait until some charging to bring back the battery juice/volt level. the power is not much, just for personal home use in range of maybe 500W - 2KW. any suggestion of the device (grid tie inverter) that can do the job? (12V battery as input).maybe this? but i believe this is not "grid tie" inverter that i can directly connect to grid right? i will need separate grid tie inverter?http://www.ebay.com.my/itm/OPTI-SOLAR-HYBRID-INVERTER-2400W-24V-PURE-SINE-WAVE-WITH-CHARGE-REGULATOR-50A-/301327416749?pt=UK_Gadgets&hash=item4628837dad#ht_4897wt_1125or maybe this one? but its pricey. its hybrid can take solar and wind and MPPT stuffs which probably i dont need. any cheaper than this?http://www.ebay.com.my/itm/3000w-Solar-Hybrid-inverter-off-grid-On-grid-max-PV-input-4500w-/131214685480?pt=AU_Solar&hash=item1e8d013528#ht_7053wt_1125i only need battery as input and converted to grid, thats it. thanks for suggestion.

author: Lightages
author_rank: Unknown
timestamp: October 15, 2014, 07:06:38 pm
content: You will want a 24v or 48v inverter. Have a look at the Schneider/Xantrex SW and XW series of inverters. They fo what you want.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 16, 2014, 05:14:39 pm
content: man thats huge! i believe the price is also proportional if not exponential. re-installation of my home distribution box, finding room for it is another big story.http://www.solarelectricsupply.com/solar-inverter/schneider-electric-xantrexisnt there any simpler that i can plug to the power outlet anywhere in the house? i'm thinking at the back of my house is the right spot for the setup (battery room + the inverter).the cost of running the cabling from batteries at the back to the front side of the house to reach those schneider XW alone can be a pain in the arse.
AM Radio with Synchronous Demodulator LM565CN - Page 1
Forum section: electronics / beginners

author: snowmix
author_rank: Newbie
timestamp: August 20, 2015, 12:30:57 am
content: I found about a 100 LM565CNs at an estate sale and I saw the 2400 Hz Synchronous AM Demodulator in the data sheet. I can't seem to find the LM1596 that also shown in this same circuit. I wonder if I could use something else or if the signal that comes out before going into the LM1596 could be amplified with an LM390 which I have a few of. Maybe im barking up the wrong tree with this whole idea and I have the total wrong IC for the job.http://www.radio-electronics.com/info/rf-technology-design/am-reception/synchronous-demodulator-demodulation-detector.phpThis is what got me interested. If I need to go another direction please let me know.

author: retrolefty
author_rank: Super Contributor
timestamp: August 20, 2015, 01:22:45 am
content: I have a Sony ICF-2010 portable shortwave radio. It's rather a famous model and was in production for a pretty long run. It has AM/SSB/ and synchronous AM. To be honest while the advantages from fading and weak AM signals was somewhat effective, the audio quality suffered compared with normal AM reception on a strong and non-fading path and I would soon tired of listening due to 'ear fatigue'.So AM SyncDet does have advantages it may not raise to the level of expectations you might expect. So a lot depends on your listening goals, broadcast quality audio is not it's strong suit.http://webpages.charter.net/n9ewo2/icf2010.jpg

author: snowmix
author_rank: Newbie
timestamp: August 20, 2015, 01:24:57 am
content: What would be the best for nice clear am. I was looking at the lady bird set up but I can't find those parts either.Sent from my Studio Mini LTE using Tapatalk

author: Kleinstein
author_rank: Super Contributor
timestamp: August 20, 2015, 09:01:54 am
content: AM detection must be done soon - not many AM stations left.AM can hardly provide high qualtity audio, not matter what type of detector. Its just the limited bandwidth of the stations and the senstivity to noise. So the detector is the least problem. With good filtering synchronous detection is very good.

author: Circlotron
author_rank: Super Contributor
timestamp: August 21, 2015, 02:56:17 pm
content: Quote from: snowmix on August 20, 2015, 12:30:57 amThat article is interesting, but SO badly written! Author keeps on repeating himself.
AM2302 Sensors - Page 1
Forum section: electronics / beginners

author: Morlan
author_rank: Newbie
timestamp: October 22, 2012, 09:55:05 pm
content: Hi,This is my first post here, so I'm a new guy, I'm also almost new to electronics.I'm having an issue, sheer lack of understanding on my part, but I'll also use this post as a kind of introduction of myself post, hope you don't mind, Isn't it still netiquette to intro and not just jump in "i want this", I dunno, It's been a while ... yes ... I can also talk the ears off a dead goat.I'm not great at electronics but I've been around it all my life (My father did this stuff for a job working in Arabia and such places for Tait, Pie etc, he was also a RadioHam, all the male side of my family are, I turned to computers and phones (back when they were still fun)) I have some experience myself, I like PIC's and I've named my Arduino Rufus. anyway, I digress somewhat,.I'm learning every day, but I don't like relying something and not understanding the goings on. I'm trying to use an AM2302 Temp and RH sensor, there is a link on a manufacturing that, very kindly, supply an Arduino library and sketch. Works a treat too. I can just use an Arduino nano in the project.but .. Than I have an Arduino project huh.I want to make this using a pic, I'm a software guy at heart and i love building stuff with them, and using a bootloader style system and wiring up empty ports on the projecteverything gets either re-purposed or expanded. And its a better "Completed project" than what would undoubtedly otherwise end up some vero attached to an Arduino nano.Only thing is, how do I do this? ...The sensor outputs by capacitance, i figured you pulse it and watch either the charge or discharge rate, (checking for the charge/discharge would be the next step to solve lol)I looked at some data, (REF:http://embedded-lab.com/blog/?p=4333) and it talks about setting the pin low, then high, then flipping the pin into read and watching for is a 5 byte data packet from the device.This small (what appears to be some passive components inside and little else) is capable of modulating a data packet like that???The sensor is an analogue to the DHT11 according to websites.I think I've just over complicated things in my head, can anyone help throw some light on this, and sorry for all the Electronic-meta-verbal-diarrhea.Nice to meet you.Morlan - UK.

author: Morlan
author_rank: Newbie
timestamp: October 23, 2012, 11:27:29 am
content: That should be DHT22 not 11.
AM2302 vs SHT11 - Page 1
Forum section: electronics / beginners

author: Dave_PT
author_rank: Frequent Contributor
timestamp: February 03, 2021, 11:56:31 pm
content: Hello everyone.I have a device (already a few years old) that used an SHT71.This sensor broke due to a fall.So I started looking for a similar sensor, but it has already entered end of life and that is why it is very rare.Alternatively I started looking for SHT11, which is more common, cheaper and compatible.However I find lots of articles for sale similar to this:But from what I see in the datasheet it seems to me that the protocol is not compatible.Can someone confirm this to me? Can you explain to me why you advertise the AM2302 as a replacement for the SHT11?Thank you.

author: msat
author_rank: Regular Contributor
timestamp: February 04, 2021, 12:30:10 am
content: Trust the datasheet and not the reseller! If the protocol between the two is different according to their datasheets, then it's a safe bet that the AM2302 will NOT be a drop-in replacement.

author: DrG
author_rank: Super Contributor
timestamp: February 04, 2021, 01:29:39 am
content: Quote from: Dave_PT on February 03, 2021, 11:56:31 pmThe two (SHT71 and AM2302/DHT22) absolutely do not use compatible protocols. Weasly advertisement. You could probably replace any humidity sensor with another, at least technically BUT that does not mean that they are drop in replacements.The DHT22 uses a proprietary serial protocol and the SHT71 uses I2C.You can get an SHT71 on Digikey for US$27https://www.digikey.com/en/products/detail/sensirion-ag/SHT71/5872295On $bay, I see them for US$16.Unless you have the project code and can program, I would say that you should just pick up another SHT71.

author: Dave_PT
author_rank: Frequent Contributor
timestamp: February 04, 2021, 07:15:43 pm
content: In short, just another wrong sales ad that was copied too many times between hundreds of sellers ...Thanks for confirming my certainties, I could be evaluating something wrong.Topic closed
AM312 pir sensor showing different vout when I add an LED - Page 1
Forum section: electronics / beginners

author: AH1234
author_rank: Contributor
timestamp: May 10, 2020, 03:15:15 am
content: I'm testing a pir sensor (namely AM312) with a multimeter, I'm finding that when I have vout connected to just a resistor then vout is coming out as around 3.2 volts by testing the voltage drop across the resistors which is expected, but as soon as I add an led then the led seem to drop 1.7 volts whilst there is no voltage drop across the resistors, I'd expect the voltage drop across the led and resistor to total 3.2 volts.I've tried sticking the resistors either side of the led thinking it could be a push up/pull down configuration but no luck, curious if anyone had any pointers on this behaviour?

author: AH1234
author_rank: Contributor
timestamp: May 10, 2020, 03:24:46 am
content: I have a 8-9v battery connected to the pir sensor, I've read that the am312 has a 3v voltage regulator which is what it seems like when I only use a resistor as the load as stated above.

author: AH1234
author_rank: Contributor
timestamp: May 12, 2020, 07:48:24 pm
content: The led has been used in other circuits where it's not shown any irregularities, standard 2 volt drop and no problem with 0.02 volts. Should I be looking into anything else, In terms of the internal circuitry of the AM312 I've found the attachment. My base assumptions are that the capacitor allows the signal to stay on for a couple of seconds after motion has been detect which is what I've seen with the led, in terms of the signal pin, there is a single resistor, I'm not sure what my led could be doing to alter the signal. Any thoughts on any method to debug further?

author: floobydust
author_rank: Super Contributor
timestamp: May 13, 2020, 12:41:05 am
content: That AM312 PIR board, note there is a large output resistor R2 20k, so the module cannot drive an LED, it can output ~0.1mA which is only enough to drive a logic gate or multimeter or an external NPN transistor. They do this to prevent damaging the PIR sensor IC from short circuits or because it is powered off higher voltage than 3.3V and the IC's max. is 3.3VTo fix, you could short R2 on the little board or add an NPN transistor to drive your LED.
Amateur electronic 'Monitor Repair' tutorial - thoughts? - Page 1
Forum section: electronics / beginners

author: SasquatchPoopSlinger
author_rank: Newbie
timestamp: May 20, 2018, 08:04:10 am
content: Hey all, been a Dave fan for agesand have been an electronic enthusiast for a lot longer than that.I have always like to create things and help teach others.So had a monitor I had to fix and thought I would give the you tube tutorial thing a go. I have been you tubing for a while just haven't been that active since life has its prioritiesTell me thoughts, criticisms about content/presentation. It is not too technical because I am not (only a sparky by trade).https://youtu.be/eHIdOK3Y010

author: Danielaz
author_rank: Newbie
timestamp: May 21, 2018, 05:10:01 am
content: The learning materials within this website have helped me tremendously and have helped to increase my knowledge.
Amazon AWS Deep learning - Page 1
Forum section: electronics / beginners

author: Karamel
author_rank: Regular Contributor
timestamp: March 05, 2018, 04:19:21 pm
content: Hi,I will deal with Amazon AWS cloud service. I need to run my deep learning codes that has written in Python language.Is there anyone who worked or is currently working on this kind of projects?Could you share your experiences with me? Where should I start?
Ambit Inverter pin details? - Page 1
Forum section: electronics / beginners

author: Lifeboat_Jim
author_rank: Contributor
timestamp: October 13, 2013, 06:44:50 pm
content: Bashing my head against a wall trying to track down the pinouts for an old Ambit DC-AC Inverter (for the CCFL backlight on an LCD panel).Model is a T62I244 Rev 01 (also written as T62I244.01, note it's a capital 'i' not a 1 in the middle). CN1 is a 10 pin and CN2 is a 2 pin (to the CCFL). Photo attached.I've tried many combinations of Google and a few Datasheet archives without success (well, plenty of mention of them in Acer 'service' documentation etc, but not the required detail just at the board level). There are also several sites selling these exact Inverters as parts, alas no Datasheet alongside.I then thought to spread the search out to other Ambit T62 Inverters in the hope they would have 10 pin CN1's but alas most have 5-7 pins so I can't even get close. I'm sure the info is out there somewhere, just a case of finding it.Cheers

author: Caca
author_rank: Contributor
timestamp: October 13, 2013, 07:31:20 pm
content: Hi,first try to identify the largest plane connected directly so connector pin - that is gonna be gnd, then the one going over the fuse is positive suply as for the others there is really no easy way to identify, but only other that should be required for it to power up is 5V ttl enable signal.

author: philpem
author_rank: Frequent Contributor
timestamp: October 13, 2013, 10:30:28 pm
content: Quote from: Caca on October 13, 2013, 07:31:20 pmThe datasheet for the controller chip is here --http://dalincom.ru/datasheet/MP1015%20schematic.pdfAn easy way would be to try and match that up with what's on the board and buzz out (continuity check) the pins -- see where they go. That should reveal the enable and brightness-control lines. You'll probably find an R/C filter on the "brightness control" line if it's meant to be driven from a PWM input.

author: fluxcapacitor
author_rank: Frequent Contributor
timestamp: October 13, 2013, 10:57:54 pm
content: The inverter is from an acer C310 ,the motherboard schematic is here :http://elektrotanya.com/acer_travelmate_c310_wistron_canary2_rev_sa_sch.pdf/download.htmlLook at page 13 for the inverter pinout.If you have the inverter cable you can test the pin connection between them.

author: Lifeboat_Jim
author_rank: Contributor
timestamp: October 13, 2013, 11:32:58 pm
content: Thanks guys, as they used to say "that will do nicely"
Ammeter tester - Page 1
Forum section: electronics / beginners

author: darinsquared
author_rank: Contributor
timestamp: March 27, 2020, 12:57:25 am
content: I have a tractor with electrical problems. I performed a voltage drop test and found a 0.6V drop on the positive side (the negative side had insignificant voltage drop). I want to build a ammeter to diagnose the problem. Here is my plan. I connect a shunt between the negative battery post and negative. Then connect an ammeter to the shunt to determine the current draw with all power usage turned off. I pull all fuses individually until I find the fuse that causes the ammeter to go to zero. Will this work?

author: Vovk_Z
author_rank: Super Contributor
timestamp: March 27, 2020, 08:10:18 am
content: Sorry, I dont fully understand your plan. If there is something wrong, usually voltmeter and ohmmeter can help.Maybe, it will be easier with multimeter like Unit UT210E - DC current clamp? They are about $50-$60. I've bought them for testing if there is some current leakage in my car.

author: Gregg
author_rank: Super Contributor
timestamp: March 27, 2020, 07:35:40 pm
content: Voltage drop from where to where and under what circumstance?Does the battery discharge when the tractor is turned off and you are trying to find the parasitic drain on the battery?Or when the tractor is running, there is a voltage drop from the positive battery terminal to some other connection point?That being stated for your consideration; a volt meter measuring a voltage drop from one point of a conductor to another is a de facto ammeter, uncalibrated, of course. But the volt meter will show relative amperage under varying conditions. The higher amperage, the higher the voltage drop across the two points.

author: bob91343
author_rank: Super Contributor
timestamp: March 27, 2020, 08:02:10 pm
content: Yes it will work. But easier might be to pull each fuse and measure across the terminals. You will see voltage if there is a load; otherwise nothing. Somebody sells a device to install in place of a fuse to measure current.These automotive problems are often elusive, as the design is usually a mess of interconnected cables and connectors.
AMOLED display with USB-C driver board - Page 1
Forum section: electronics / beginners

author: Sudomeme
author_rank: Newbie
timestamp: October 22, 2024, 12:41:05 pm
content: Hi,Apologies about the very basic question, as I don't have any real experience with PCBs or displays!I own a GPD handheld PC and the 6 inch display recently broke. I'm looking for a non OE AMOLED replacement and am thinking about utilising the device's second USB-C port as a Display port.The only MIPI board that I can find that works fits the criteria is a 60 pin MIPI and the only suitable display is a 48 pin. It's all double Dutch to me, but is it possible to get the board to work with the AMOLED display?
Amp attenuator cct. - Page 1
Forum section: electronics / beginners

author: kvresto
author_rank: Regular Contributor
timestamp: October 17, 2014, 05:18:04 am
content: Hi.I want to convert a bipolar +12V to -12V ac signal into a single ended 0V to 3V signal. I have been simulating in SPICE a general purpose amp for this example and I have settled on the design shown in the pic. What I don’t know is whether this configuration with the feedback set up as an attenuator is stable. Will this design work or is it doomed when I actually build the cct? Is there an amp which is best suited for this, or even another method, I’m still searching for the best method.Cheersk.v

author: HalfSpace
author_rank: Regular Contributor
timestamp: October 19, 2014, 09:05:31 pm
content: Hi kvresto,Do you need to use an opamp if all you require is an attenuator with dc bias?The LTspice simulation below may do what you want.HalfSpace

author: LvW
author_rank: Frequent Contributor
timestamp: October 20, 2014, 06:12:34 am
content: https://www.eevblog.com/forum/projects/amp-attenuator/kvresto - why did you ask this question again (see the above link)? Not happy with answers?
Amp clamp extension cord - Page 1
Forum section: electronics / beginners

author: ksat44
author_rank: Contributor
timestamp: April 30, 2023, 11:00:35 pm
content: I have a Hantek cc-65 amp clamp whose leads I'd like to extend. It has the usual BNC connector on the end of it. To make it happen, I thought I might use a 50 ohm RG58 cable that has either 1 BNC male and 1 BNC female connector on it or a cable which has 2 BNC male connectors and add a female to female connector to be able to join everything. Think there'd be any issue in setting it up that way? The clamp is used mostly in the automotive realm/low frequency stuff, if that matters any.

author: Kim Christensen
author_rank: Super Contributor
timestamp: April 30, 2023, 11:55:08 pm
content: I can't see any issue with that though you may want to have some insulation over the junction point.ie: If you were using it with a two channel oscilloscope and had one channel already measuring a ground referenced signal. (Your scope ground is now tied to vehicle ground)Then while placing the current clamp (Connected to 2nd channel of scope), somewhere else in the engine bay, you drag that BNC connector over the +battery post, etc. Sparks n smoke.

author: ksat44
author_rank: Contributor
timestamp: May 01, 2023, 03:32:57 am
content: Thanks for the reply and the suggestion. That had crossed my mind; about insulating that connection. Thought I might use a Velcro piece to cover it up.

author: barshatriplee
author_rank: Regular Contributor
timestamp: May 02, 2023, 01:33:36 pm
content: Make sure that the connectors are securely attached to the cable and have a good electrical connection. Loose or poorly attached connectors can cause signal loss, interference, and noise. Longer the cable, the greater the chance for signal loss due to cable resistance, capacitance, and inductance. To minimize signal loss, it is recommended to use the shortest length of cable possible for your application.