hybridfree/eevblog-posts huggingface dataset:
Inquiry for ?Underground 512 hz sonde for Plumbing detector system? - Page 1
Forum section: electronics / beginners

author: avokarayan
author_rank: Newbie
timestamp: December 18, 2016, 06:34:20 pm
content: All I know there is a control unit above ground has 4mhz crystal, a microchip and few more components, and from there 2 wires go underground and on a end is a coil ( no ferrite, 500 winding, 29-30GA ) witch will transmit a 512HZ signal. Can you please help me with the simple circuit diagram. Thank you.The same sonde used mostly by plumbers, to get the location of the problem in a sewer or drain lines

author: Simon
author_rank: Unknown
timestamp: December 18, 2016, 06:43:30 pm
content: people will need more information than that.

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 18, 2016, 07:13:25 pm
content: Your description sounds backwards. They typically bury an insulated wire alongside a pipe (particularly a non-conductive pipe like plastic.) Then, to detect it, they connect a simple transmitter to the exposed end of the buried wire, and use a receiver with a loop antenna above the surface to identify the location of the buried wire (and the adjacent pipe.) If you have some other kind of activity in mind, then please reveal it.This is sometimes called "fox and hound". There are many resources available online by spending a few quality milliseconds with Google. You could start here:https://www.google.com/search?q=underground+pipe+locator+circuit&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjewOm4uf7QAhVEVWMKHWqfDHYQsAQIfA&biw=1280&bih=660
Inrush current limiter: power driven - Page 1
Forum section: electronics / beginners

author: shreknel
author_rank: Newbie
timestamp: August 14, 2014, 06:12:52 pm
content: Hi guys,I have a question which I've been looking into but cannot find anything about online.I've put the reason behind it as a PS so the curious or helpful can read about it there.I need an AC inrush current limiter (ICL) which is "power controlled" (resets to initial low current passing state when load is disconnected).I found some models online that support this:http://www.fg-elektronik.de/en/powersystems/standard-devices/ac-ac/einschalt-strombegrenzung.htmlBut I wanted to understand how they work, so I tried to find a schematic for them and came up short. (the pdf linked on the previously linked site seems to contain a "voltage controlled" schematic".The only schematics I found were for "voltage controlled" ICLs (only resets to initial low current passing state when circuit itself is disconnected).An example of this type is found in the following drawing:(apologies for the poor picture quality)My theory is that a small modification to this schematic would result in a "power controlled" ISR:instead of connecting the "bottom" of the rectifier to the "bottom" of K1, one could connect it to the"top" of K1 and insert a (measuring) resistor R between this new connection point and F1.This measuring resistor would then create the voltage drop to power the relay (which would ideally be a 5V or so variant) instead of theoriginal voltage over K1. When the AC current would drop to 0, the relay would not be powered anymore and the current would have to flow throughthe NTC resistors again.If anyone has any more insight into this topic, I'd be very grateful to learn a bit more about this topic.thanks!PS: reason why:I'm planning on purchasing an inverter generator (http://en.wikipedia.org/wiki/Engine-generator), which I want to use for emergency power.Now, I need to let the generator do a little bit of work once every month to avoid it getting clogged and jammed.I anyway need to mow my lawn or do some work in the garden with electric tools, so I wanted to use it to power those.However, I want to stay well below the limits of the inverter and this is not so easy with highly inductive loads which have high inrush currents
Inrush current will kill a SOD323 Schottky? - Page 1
Forum section: electronics / beginners

author: makebit
author_rank: Unknown
timestamp: October 10, 2025, 04:49:54 pm
content: Hi ,The 4.2V source gets suddenly applied, once per day.Do you think the SOD323 Schottky BAT54J will eventually die from the inrush?The 4.2V source has 20 milliohms internal resistance.The 1uF cap is an MLCC, 16V , X7RBAT54Jhttps://assets.nexperia.com/documents/data-sheet/BAT54J.pdfLTspice simulation and PNG schem attached

author: inse
author_rank: Super Contributor
timestamp: October 10, 2025, 05:32:22 pm
content: I don’t think 1uF can do any damage
Install ampmeter in psu? - Page 1
Forum section: electronics / beginners

author: Unknown
author_rank: Unknown
timestamp: February 23, 2016, 02:12:05 am
content: Hi, I'm new here.Got a question about how to install an Ampmeter in a PSU.Should it be installed on GND?Thanks in advance

author: Audioguru
author_rank: Super Contributor
timestamp: February 23, 2016, 03:21:24 am
content: If the psu has a regulated voltage then simply tacking a current meter to the output ruins the voltage regulation.The current meter should be designed into the circuit of the psu so that it is inside the negative feedback loop. Then its current sensing resistance has no effect on the voltage regulation.

author: Unknown
author_rank: Unknown
timestamp: February 23, 2016, 05:21:46 am
content: It has no voltage regulator, I am in progress of building it.

author: michaeliv
author_rank: Frequent Contributor
timestamp: February 23, 2016, 10:36:23 am
content: What is your schematic / idea ? Are you making a variable power supply out of prebuilt modules ?Generally you would put the ammeter on the positive side.

author: mariush
author_rank: Super Contributor
timestamp: February 23, 2016, 05:11:54 pm
content: You have at least two choices.You can use a small resistor (current shunt) to measure the voltage drop across it and optionally amplify this value to be within a specific range (0..5v for example). In this case, you would need to use a third voltage sense wire after this current shunt and constantly read the voltage there and adjust so that the output voltage will be as desired. The more current used by devices, the higher the voltage drop on the resistor so the output will be lower, so your regulator will actually have to output slightly higher voltage.If super accuracy is not that important, you can use one of those hall effect chips, which measure the current without a resistor (there is some resistance but it's somewhat constant at 0.01 ohm or something like that so negligible ) ... for example see ACS712 :http://www.digikey.com/product-detail/en/ACS712ELCTR-05B-T/620-1189-1-ND/1284606They'll output a particular amount of voltage depending on how much current flows through the wire, without affecting the voltage on the wire so you could read the output voltage of this chip and use a small microcontroller or something to convert that output voltage to Amps (with a microcontroller you could also "calibrate" each chip and correct the readings in your microcontroller to get a higher accuracy).

author: Unknown
author_rank: Unknown
timestamp: February 27, 2016, 02:06:57 am
content: Sorry for the late reply.I am makeing my benchPSU from a topgrade pc PSU.Thanks for the answer.I bought 2x ofhttp://www.ebay.co.uk/itm/DC100V-10A-Voltmeter-Ammeter-Blue-Red-LED-Amp-Dual-Digital-Volt-Meter-Gauge-FT-/321752233227?hash=item4ae9ed750b:g:vPUAAOSweW5VUKP1As it is my first PSU build, I'm not gonna do too much, but I've made it so it's easy to add other stuff to it.Anyway, I'm starting out simple, will make my own from bottom at some point in the future, just want more knowledge, and this is more so I have a benchPSU.Thanks
Installing an HDMI Port in an iPad Air  - Page 1
Forum section: electronics / beginners

author: Sublime
author_rank: Contributor
timestamp: August 03, 2015, 08:47:06 am
content: I've been wondering if installing an HDMI Port in an iPad Air would be a reasonably doable thing for a beginner like myself... An issue I already see is that the outer frame would not be able to fit the size of the HDMI port... So perhaps a Mini-HDMI would be doable. Although - the HDMI port would be ideal. I realize there is an adapter for this purpose... But a port for the HDMI itself would be pretty handy. I'll work around the casing issue if this is doable.If this is a doable thing for a beginner like myself - what all will I need to do? For future reference - how can I "modify" already built boards? This is a kind of off topic question but also relevant. I'm quite confused on how to modify boards that have already been designed - especially in regards to adding components to them. Is this a doable thing?

author: RobertHolcombe
author_rank: Frequent Contributor
timestamp: August 03, 2015, 10:56:37 am
content: I've never worked on apple devices but I would guess like most tablets and phones they have very little if any empty space.Below is a link to the innards of the lightning to HDMI adapter apple sellhttp://www.stock-bond.com/Lightning-Digital-AV-Adapter-chip.jpgClearly not as simple as mounting the connector somewhere and running bodge wires to it, you could buy the adapter and hack it into the case assuming you find space, but at that point you have bought the adapter... lol

author: helius
author_rank: Super Contributor
timestamp: August 03, 2015, 11:06:53 am
content: That's the funniest thing I've heard since "a series of tubes".No, such modifications are not possible unless you can reverse engineer the hardware.

author: amyk
author_rank: Super Contributor
timestamp: August 03, 2015, 12:07:38 pm
content: Yes you can probably fit the connector to the case somehow, but the biggest question iswhat are you going to connect it to? I highly doubt they will have unpopulated pads on the mainboard for HDMI out...
Installing QSpectrum Analyzer & SoapySDR on Ubuntu  - Page 1
Forum section: electronics / beginners

author: sairfan1
author_rank: Frequent Contributor
timestamp: March 08, 2024, 04:06:49 pm
content: I tried installing QSpectrum analyzer ond SoapySDR on windows but I came to know that QSpectrum Analyzer has issue running on windows with HackRF OneI download and installed Ubuntu, but found that there is not one package (or one set of instructions) to install SoapySDR which is dependency for QSpectrum Analyzer, below are the links to their main repository and instructions that look outdated.https://github.com/xmikos/qspectrumanalyzerhttps://github.com/pothosware/SoapySDR/wikiI was lost looking at installation instructions related to SoapySDR there are lots of dependencies, when i run commands from instruction page I came to know that those packages do not exist anymore etc.I wanted to know if someone has setup SoapySDR and QSpectrum Analyzer can you please provide help or some sources (website page) to setup it on Ubuntu or Windows.

author: wofritz
author_rank: Contributor
timestamp: March 09, 2024, 10:02:33 am
content: I am running soapysdr on Ubuntu 22.04Following packages are installed:Code:ii libsoapysdr0.8:amd64 0.8.1-2build1 amd64 software defined radio interface libraryii soapysdr-tools 0.8.1-2build1 amd64 software defined radio interface library toolsii soapysdr0.8-module-airspy:amd64 0.2.0-3 amd64 Airspy device support for SoapySDRii soapysdr0.8-module-bladerf:amd64 0.4.1-4 amd64 bladeRF device support for SoapySDRii soapysdr0.8-module-hackrf:amd64 0.3.3-5 amd64 HackRF device support for SoapySDRii soapysdr0.8-module-redpitaya:amd64 0.1.1-4 amd64 RedPitaya device support for SoapySDRii soapysdr0.8-module-remote:amd64 0.5.2-3 amd64 Use SoapySDR devices over network (client module)ii soapysdr0.8-module-rtlsdr:amd64 0.3.2-1 amd64 RTL-SDR device support for SoapySDRii soapysdr0.8-module-uhd:amd64 0.4.1-3build1 amd64 UHD device support for SoapySDRI think following commands should install it:Code:sudo apt-get install lsudo apt-get install libsoapysdr-0.8sudo apt-get install soapydr-toolsMaybe you should install -dev and -doc too:Code:sudo apt-get install libsoapysdr-devsudo apt-get install libsoapysdr-docI have no idea about QSpectrum analyzer.

author: sairfan1
author_rank: Frequent Contributor
timestamp: March 10, 2024, 03:15:11 am
content: Meanwhile I was able to run it one Windows, On Ubuntu I setup SoapySDR/Pothor and QSpectrum Analyzer, When I run a sweep on console I can see commands were sent to HackRF and response received, but no activity on application I'm not experienced with Ubuntu (Linux) I believe, I need to set path to executable ie. hackrf_sweep can you please guide me on Ubuntu what could be the path? I install Pothor on default path
Installing Variable or fixed Current limiter on an existing Condor Power Supply - Page 1
Forum section: electronics / beginners

author: ohmedarick
author_rank: Newbie
timestamp: July 13, 2017, 04:04:45 pm
content: Hi:I'm new in electronics. I Have a old Condor Power supply from 1990 I think. It came out out of a Stress Test ECG machine.. The PS works fine. It puts out +5v at 10 amps ; +12v at 3 amps ; -12v at 3 amp ; +15v at 3 amp; +28v at 1.25 amps ; -28v 1.25 amps, I would like to regulate the voltage between 1.2 to 30 volts and be able to control the current output from 10 uA to 1.10 amps on the plus and minus side of the 28 volts output of the PS. On the 12 volt and 5 volt output I would like to control the current output from 10 uA to 1.5 amps in order to avoid toasting or damaging any components when testing on a test board... I’m very prone to shorts and mistakes. If anyone have any simple solution. Please HELP!! Thank youRicardo
Instek and NI Signalexpress, Anyone done it? - Page 1
Forum section: electronics / beginners

author: Bren
author_rank: Contributor
timestamp: October 31, 2012, 06:06:49 am
content: Hi everyone,I'm interested in being able to use signalexpress with my Instek scope (GDS1102A-U). Instek has provided the Labview drivers, so I believe it is possible. I would love to be able to use signalexpress with my scope similar to the way that you can use signal express with a Tektronix scope.I am fairly new to Labview, and would like to know if anyone had any success with signalexpress and their Instek scope.Thanks in advance!Bren
Instek-PC3030 questions - Page 1
Forum section: electronics / beginners

author: FlameTai1
author_rank: Newbie
timestamp: January 04, 2024, 11:32:04 pm
content: Hi all, about to pick up an older style DC power supply, while I'm okay with it having analog displays, I was curious how hard of a project would it be to convert the displays to digital? Any input/insight would be greatly appreciated!Pic is of the one I'll be snagging up!

author: Smokey
author_rank: Super Contributor
timestamp: January 05, 2024, 12:52:37 am
content: I have two of those exact same supplies. Been on the bench for years now. Powered lots of projects and works fine for what it is. Only ever had one output diode problem that was pretty easy to fix.About the only time they get use these days though is in parallel/series with the Rigol DP832 when I need more current or voltage.I would personally say it's not worth it to mess with the analog displays. The front panel pots are really pretty coarse. So unless you also plan on changing the set point adjustments too you aren't getting a lot. If you need better readout, just put a meter on the output and monitor it that way.

author: FlameTai1
author_rank: Newbie
timestamp: January 05, 2024, 02:58:04 am
content: Really appreciate the input! Actually an electrician by trade so good point on the multimeter. I'm 32, finally starting to delve into the world of ICs and learning about everything that I can for it. I know a decent amount already but never had the tools (oscilloscope, etc) to properly diagnose issues and/or prototype my own boards. Super excited to do so though! Have only ever replaced bad components and blown caps when obvious to the eye, which is far and few nowadays with them getting smaller and smaller lol!Actually perked my interest big time to get into board prototyping because of my Flipper ZeroAnyway, not looking to make it extravagant or super accurate, was actually just looking at it as a possible learning experience that would just have an upside to it as well tbh!
Instruction for Mega328 - Page 1
Forum section: electronics / beginners

author: javagerms
author_rank: Newbie
timestamp: February 25, 2017, 10:28:08 am
content: I'm new to the forum. just bought the 2016 kits Mega328 transistor tester MOS ESR frequency LCR Diode Capacitor meter from ebay:http://www.ebay.com/itm/152191861608?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIThowever, the kit doesn't come with the instruction. if anyone have a copy of the instruction, please point me where I can download it.thanks

author: madires
author_rank: Super Contributor
timestamp: February 25, 2017, 11:06:30 am
content: Somewhere on the last ten pages ofhttps://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/there are several posts about that kit.

author: javagerms
author_rank: Newbie
timestamp: February 25, 2017, 08:21:05 pm
content: Found it. Thank you so much!!!
instruction on SMT soldering - Page 1
Forum section: electronics / beginners

author: daedalus
author_rank: Regular Contributor
timestamp: May 25, 2011, 09:52:55 pm
content: Hi,If anyone is interested in proper techniques for SMT and through hole soldering, you might want to check out the videos on the IPC website. For each of their expensive training videos, they offer a low resolution download for you to evaluate the video. Not great quality, but still watchable. For examplehttps://portal.ipc.org/Purchase/ProductDetail.aspx?Product_code=e8a9a607-b586-db11-a4eb-005056875b22, then click the free review button.The site covers soldering, assembly, rework, etc.

author: KJ6EAD
author_rank: Contributor
timestamp: May 28, 2011, 11:46:25 am
content: The IPC videos are okay but slow and boring. I recommend these to start:How and Why to Solder CorrectlySurface Mount Soldering 101
Instrumentation Amplifier exercise - Page 1
Forum section: electronics / beginners

author: alex123
author_rank: Newbie
timestamp: May 12, 2020, 12:39:54 am
content: If the site's Ad gain is 1000 (times). Determine the resistive components of the circuit.I came to the conclusion that vo / (V1-V2) = (R3 / R2) (1+ {2R1 / Rgain}) Take the traditional 3-opamp instrumentation amplifier, keep in mind that operational amplifier 1 is inverted

author: gbaddeley
author_rank: Regular Contributor
timestamp: May 12, 2020, 03:04:30 am
content: FYI , it is Instrumentation, not Instrumental (pertains to music)

author: Jwillis
author_rank: Super Contributor
timestamp: May 12, 2020, 03:51:05 am
content: G= R3/R2 (1+2R1/Rgain)R3=100KR2=10KR1=9k9Rgain=100

author: magic
author_rank: Super Contributor
timestamp: May 12, 2020, 04:17:17 am
content: Quote from: alex123 on May 12, 2020, 12:39:54 amIndeed, this is some nonsense circuit with positive feedback. A1 output will randomly saturate into either of its supply voltages. I suppose that has to be a mistake.

author: Circlotron
author_rank: Super Contributor
timestamp: May 12, 2020, 05:19:41 am
content: The upper opamp is wrong. Various websites have copied and pasted without looking closely. Most have it right though.https://www.google.com.au/search?q=3+op+amp+instrumentation+amplifier&source=lnms&tbm=isch&sa=X&ved=2ahUKEwihyduTya3pAhXZHDQIHZK_A8MQ_AUoAXoECBAQAw&biw=1264&bih=951Edit -> seems the same set of images don't come up every single search...

author: Jwillis
author_rank: Super Contributor
timestamp: May 12, 2020, 05:33:53 am
content: Quote from: Circlotron on May 12, 2020, 05:19:41 amYour right . Shouldn't both inputs be non-inverting ? So my calculations would be wrong.

author: anvoice
author_rank: Frequent Contributor
timestamp: May 12, 2020, 06:22:55 am
content: Quote from: gbaddeley on May 12, 2020, 03:04:30 amI had a class in uni called "Instrumental Chemistry". We played 0 music.

author: alex123
author_rank: Newbie
timestamp: May 12, 2020, 09:04:24 pm
content: https://www.elprocus.com/what-is-an-instrumentation-amplifier-circuit-diagram-advantages-and-applications/

author: chris_leyson
author_rank: Super Contributor
timestamp: May 13, 2020, 07:44:53 am
content: QuoteReminded me of this:-

author: Jwillis
author_rank: Super Contributor
timestamp: May 14, 2020, 02:23:11 am
content: Quote from: alex123 on May 12, 2020, 09:04:24 pmIf you read the paragraph . Instrumentation Amplifier using Op Amp"The instrumentation amplifier using op-amp circuit is shown below.The op-amps 1 & 2 are non-inverting amplifiersand op-amp 3 is a difference amplifier. These three op-amps together, form an instrumentation amplifier. Instrumentation amplifier’s final output Vout is the amplified difference of the input signals applied to the input terminals of op-amp 3.Let the outputs of op-amp 1 and op-amp 2 be Vo1 and Vo2 respectively."This leads me to believe that the circuit is drawn wrong on that web sight. Op amps 1 and 2 must be non-inverting.
Instrumentation Amplifier Vin Vout Question - Page 1
Forum section: electronics / beginners

author: Kv3t4k
author_rank: Newbie
timestamp: November 22, 2021, 06:38:30 pm
content: Hello,Sorry for my bad English, but i have never learned English.I have a question about the Instrumentation Amplifier.I am using INA828 for the current sense through the voltage drop on the resistor. I will be measure current flow in to the DC-DC convertor.I need measure current only when DC-DC convertor is running without load, so the current flowing into him shoud be between 10-14 mA.Circuit connection is shown in the attachment.Input voltage is 5V DCResistor is 0,27RGain is set to 501Vs+ =s +10VVs- = -10VBy my calculations for the output voltage shoud be 1,353V(10mA) - 1,894V(14mA) depends on the current.So my question is when i turn on the load of the DC-DC convertor, there shoud be current flowing through the resistor about 140mA. Can it cause some damage to the INA828, because voltage drop on the resistor will be 0,0378V and output voltage would try to achieve 18,938V but it is impossible with supply voltage i have using.Thank you very much.

author: Manul
author_rank: Super Contributor
timestamp: November 22, 2021, 07:57:37 pm
content: What you describe is called op-amp (in this case in-amp) saturation. When power rail voltage is not enough to achieve required output. No damage will occur from that. The only negative aspect is that most op-amps spend some time to get out of saturation. So if you overdrive it and then the signal drops, it reacts slower then overwise slew rate would alow, with a delay. I think it really does not matter in this application.The general rule is to keep inputs between the power rails. Functional range could be smaller if inputs are not "rail to rail". In your case, none of inputs should go below -10V or above +10V, then everything will be fine. There are op-amps and in-amps which have some protection or extended range and can tolerate more voltage without damage. INA828 datasheet states +-40V.

author: Kv3t4k
author_rank: Newbie
timestamp: November 22, 2021, 08:20:06 pm
content: I was not 100% sure, but i think it shoud not be a problem. Thank you very much for quick response.
Insulation expected on an flyback transformer - Page 1
Forum section: electronics / beginners

author: gkmaia
author_rank: Frequent Contributor
timestamp: May 11, 2020, 10:01:46 am
content: I am testing the insulation between windings of a 220v to low voltage 100khz flyback transformer.I am applying 1Kv with my insulation tester and I am getting really low results. For some winding pairs I get values above 5Gohms.But for others I get something at the 2Mohm range. I imagine that is way too low and for those windings the insulation between them has fried. Is that correct?What is the expected minimum threshold insulation resistance between transformer windings at 1000v I should expect?Should I expected different insulation resistance on ferrite vs iron transformers?

author: Siwastaja
author_rank: Super Contributor
timestamp: May 11, 2020, 01:37:39 pm
content: It is possible those windings with smaller insulation resistance are not supposed to be insulated from each other. For example, it could be a primary winding, and a feedback winding, which are both referenced to the primary side. Or, you could have two output windings. In these cases, functional isolation is enough.
Insulator lacquer - Page 1
Forum section: electronics / beginners

author: lastwarrior
author_rank: Contributor
timestamp: May 09, 2015, 09:13:11 pm
content: Hi, i cant find anything about what i need using google , i just dont know how it's called. Ok , my problem : i had damage a little bit isolation of a brush DC motor winding and i want to cover it using an insulator lacquer or something. Please give me an advice what is better thing for this purpose. Or give me some name of the solutions using as electrical insulator that are available. Thank You.

author: rdl
author_rank: Super Contributor
timestamp: May 09, 2015, 09:45:48 pm
content: You have not specified your requirements such as operating temperature, voltage, etc. However, in general you are looking for something like conformal coating, insulating varnish, or insulating lacquer.

author: lastwarrior
author_rank: Contributor
timestamp: May 10, 2015, 05:18:22 am
content: The voltage of this DC motor is 220V and i think temp. of the insulator must be below 100 degree . Becouse this motor is directly concted to main line , there are huge currents . This lacquer must resist it. 1400Watts

author: OC71
author_rank: Contributor
timestamp: May 10, 2015, 06:45:17 am
content: Glyptal.http://www.glyptal.com/1201tech001.pdf
Integer to string conversion - Page 1
Forum section: electronics / beginners

author: wicket
author_rank: Contributor
timestamp: April 22, 2014, 08:57:50 am
content: Hi,is there a way to convert an integer to string (array of chars) in c? For example int x = 15 to char y[] = "15" ? I'm using MPLAB (xc8 compiler).

author: andtfoot
author_rank: Unknown
timestamp: April 22, 2014, 10:01:27 am
content: For a more manual method, you could try the following. I'm not much of a programer, so I wouldn't know the syntax to actually achieve it.- Divide the number into individual digits (e.g. 157 is (1 x 100) + (5 x 10) + (7 x 1))- For each number, add 48 to it. This gives the ASCII value of that number (e.g 1 + 48 = 49 = ASCII '1' ... 5 + 48 = 53 = ASCII '5' ... 7 + 48 = 55 = ASCII '7')Not sure if then you can feed in the numerical ASCII value instead of a char to then print it.

author: DmitryL
author_rank: Regular Contributor
timestamp: April 22, 2014, 10:10:58 am
content: Quote from: wicket on April 22, 2014, 08:57:50 amThere are too many ways to skin this cat.As already mentioned, you can use sprintf (heavy).Also, if you don't want to use sprintf and division, you can try to convert your number to BCD and convert BCD nibbles to characters.http://stackoverflow.com/questions/13247647/convert-integer-from-pure-binary-to-bcd

author: Codemonkey
author_rank: Regular Contributor
timestamp: April 22, 2014, 10:11:44 am
content: See if you have the itoa() function available in MPLAP. I don't use it so I've no idea.

author: wicket
author_rank: Contributor
timestamp: April 22, 2014, 11:36:33 am
content: itoa() worked for me, thanks.

author: icon
author_rank: Regular Contributor
timestamp: April 22, 2014, 07:21:50 pm
content: Hi(I know you've solved it but) Some useful info here:https://www.eevblog.com/forum/microcontrollers/(pic)-converting-sfrgpr-values-to-strings/RegardsJohn

author: amwales
author_rank: Regular Contributor
timestamp: April 23, 2014, 10:36:29 pm
content: RANT ON ---->The xc8 library is appalling and the optimized code produced by the compiler is bad enough to make you hurl. Just take a look at the shit it kicks out if you write*dst++ = *src++;*dst++ = *src++;*dst++ = *src++;<---- RANT OFF
integrated bipolar stepper motor driver with external mosfet support - Page 1
Forum section: electronics / beginners

author: nour
author_rank: Frequent Contributor
timestamp: March 21, 2016, 12:07:50 pm
content: Hi,I wonder if there is any bipolar stepper motor driver integrated circuit that support adding external H-bridge using mosfetsI am asking because I think if there is something like that I will have all the features of well engineering and well design driver and also will be able to add whatever mosfets I want to gain more power

author: xyrtek
author_rank: Regular Contributor
timestamp: March 25, 2016, 02:57:25 am
content: Hi,check here:http://www.digikey.com/en/product-highlight/s/stmicroelectronics/motor-control-devkitshttp://www.digikey.com/product-detail/en/EVAL6480H/497-13354-ND/3694208?WT.z_slp_buy=stmicroelectronics_motorcontrol-devkitshttp://www.st.com/web/en/resource/technical/document/data_brief/DM00064882.pdfThere are many other choices but I have used that series (64XX).C, netmf and arduino drivers are easy to find/provided by st. (I have some UWP drivers in the work)It helps they have plenty of development boards available.85V@10A covers quiet a lot of motors.Incidental work pic here:https://www.eevblog.com/forum/testgear/siglent-spd3303d-review/msg902444/#msg902444
Integrated circuits designed for network firewall applications - Page 1
Forum section: electronics / beginners

author: brownt
author_rank: Regular Contributor
timestamp: October 02, 2024, 10:23:00 am
content: Hi, are there integrated circuits designed specifically for firewall applications?

author: coromonadalix
author_rank: Super Contributor
timestamp: October 02, 2024, 04:02:25 pm
content: i dont think the common human can get themFortinet does use some ... but as general availability ..... i don't think so .... and data sheet would be un-available most of the time

author: indeterminate
author_rank: Regular Contributor
timestamp: October 02, 2024, 10:19:23 pm
content: All the ones i have seen are proprietaryhttps://community.juniper.net/blogs/dmitry-shokarev1/2024/03/12/express-5-overviewhttps://community.juniper.net/blogs/david-roy/2024/09/02/fast-lookup-tuple-an-innovative-filtering-featureI have seen a few boxes use FPGA's with a hardware cpu & IP core to speed things up when a cpu alone was to slow.unless you are building sumthing with industrial scale grunt just use opensource code and a cpu , its cheep and fast.
Integrated diode bridges over discrete diode bridge. - Page 1
Forum section: electronics / beginners

author: sahko123
author_rank: Frequent Contributor
timestamp: June 16, 2020, 02:47:28 pm
content: When it comes to power supplies what are the specific benefits (besides package convenience) to integrated bridge rectifiers over just having them made discretely? You get access to all contacts anyway for suppression caps anyway and both diodes are designed for power applications what tangible benefits would one hold over the other?

author: Gyro
author_rank: Super Contributor
timestamp: June 16, 2020, 05:28:39 pm
content: That's it - packaging convenience, particularly when some form of heatsinking is involved.They're also usually more compact than discrete too (for the same rating).

author: bob91343
author_rank: Super Contributor
timestamp: June 16, 2020, 11:10:25 pm
content: The bottom line is cost. Cost of the part, and labor time to insert and solder. Reliability perhaps a bit better.A side benefit is likely to be better matching of the diodes than picking from a bag at random. And very slightly lower output ripple.

author: james_s
author_rank: Super Contributor
timestamp: June 16, 2020, 11:39:00 pm
content: Space on the PCB is the main one. Separate diodes are typically cheaper but they consume more space. In larger sizes that need a heatsink, having a single packaged unit is far more convenient. Otherwise it doesn't matter, just use whatever. I have thousands of 1A diodes a friend gave me years ago so I often use separate diodes in place of a bridge simply because I have loads of them.
Integrating Harman Kardon speaker into car  - Page 1
Forum section: electronics / beginners

author: andrewlapham
author_rank: Contributor
timestamp: January 28, 2020, 07:09:07 am
content: Hey guys i picked up one of those nice Harman Kardon Onyx Bluetooth speakers from my local thrift shop the other day and the sound quality is superb! anyway, i was thinking i would like to integrate it into my old Mazda 121 as the stock speakers are pretty terrible. I'm just having trouble figuring out how i should merge it into the car audio ecosystem.The car currently has a small BlueTooth stereo that drives 4 small speakers. i would like the main head unit in the car to still drive the front speakers but have the back speakers replaced with the Harmen Karmon Amp.. somehow..The car stereo has 4x RCA audio outputs and the basic speaker harness plugany ideas??

author: Psi
author_rank: Super Contributor
timestamp: January 28, 2020, 09:16:08 am
content: The bluetooth in your car stereo is a Bluetooth audio receiver, so you cannot use it to send audio to the Harman Kardon speaker.You have two options as i see it- Keeping the Bluetooth -Buy a bluetooth audio transmitterPair it to the Harman Kardon speakerConnect the bluetooth audio transmitters audio inputs to the RCA outputs for the rear channels- Rip device apart -Rip out bluetooth PCB from the Harman Kardon speaker and wire your existing rear speaker wires to the drivers inside the Harman Kardon speakers.

author: andrewlapham
author_rank: Contributor
timestamp: January 28, 2020, 11:33:17 am
content: So I've been snooping around inside the speaker and found the audio inputs for the driver(s). would I be correct in assuming I could push audio from the RCA OUTPUT in the back of the car stereo into the Left and Right channels of the driver? As there are two drivers on this board I guess ill have to follow the traces to where they meet up and inject my audio at that point, would this magic spot be on the DAC?Also, any information on the ADC + DAC would be helpful. I'm guessing this is a bridge between the Bluetooth module and the audio driver?Picture is attachedJust after posting this image (wow taking a picture really help with enlarging the detail!) I've noticed that the left and right inputs from the driver do in fact run through the block of capacitors and resistors in the middle straight through to the DAC's analog output pins
INTEL 3604 PROM PROGRAMMING - Page 1
Forum section: electronics / beginners

author: pilogger
author_rank: Newbie
timestamp: October 07, 2013, 05:23:52 pm
content: Does anyone know of any Memory programmer that can program INTEL 3604 PROMs?

author: free_electron
author_rank: Super Contributor
timestamp: October 07, 2013, 06:06:13 pm
content: The intellec prom programmer can do that. good luck finding one. The intel museum has one ...

author: Kjelt
author_rank: Super Contributor
timestamp: October 07, 2013, 08:07:21 pm
content: Don't know one eitherI suggest comparing the datasheet with a common supported eprom like the 2708 for instance and see if you can build you're own conversion board between the two. I did that a few times in the far past for some pinball machine pcbs.You say program or do you mean only to read the contents?Programming is often some more work ( converting the program voltages and times) and is only interesting if you want to keep the device as original as possible.

author: woodchips
author_rank: Frequent Contributor
timestamp: October 07, 2013, 08:23:22 pm
content: Sure it is 3604? A 2604 would be more likely, that is a non-erasable 2704 and that is half a 2708. A 2708 should be readable on the 2716 setting. By bending pins out, +12v and -5v then should be possible to use a 2716 or 2732.

author: free_electron
author_rank: Super Contributor
timestamp: October 07, 2013, 08:34:58 pm
content: guys. this is not en eprom but a prom.Eprom is charge injection on a floating gate. a prom is a diode that gets fried into a short...the programming algorithm for a prom is much more timing critical. dump too much power and you end up with an open diode.. not what you want.

author: Kjelt
author_rank: Super Contributor
timestamp: October 08, 2013, 07:06:23 am
content: Ok then I am really curious why someone would like to use one of these now a days

author: MrAureliusR
author_rank: Unknown
timestamp: October 08, 2013, 07:18:23 am
content: This is an interesting topic. I've got a handful of old AMD PROM's that I would either love to use in a project (just for the vintage fun value) or see if there's anything on them. My MiniPro doesn't even come close. It can do some EPROMs though. I'm trying to find UV bulbs to hack my own EPROM eraser. Anyone know how much power I need for a decent eraser bulb?

author: Kjelt
author_rank: Super Contributor
timestamp: October 08, 2013, 08:08:58 am
content: Quote from: MrAureliusR on October 08, 2013, 07:18:23 amNot so much power as wavelength is important. If the power is lower simply use more time. Check when the eprom is empty and double the time. But look at the wavelength, some uv face browners with tl lights work perfectly but the special lamps work better.
Intel on-site interview - Page 1
Forum section: electronics / beginners

author: Fantasma25
author_rank: Regular Contributor
timestamp: April 14, 2015, 03:42:06 am
content: Hello! A couple of months ago I made a post about a phone interview I was going to have with Intel. It went well thanks to your tips, but I was still 1 semester away from graduating, so the person that interviewed me told me to contact him again around march-april to interview me again. Time passed by and I studied/made projects about some of the topics that he asked me (mainly how to make a design go faster). I contacted him again and he scheduled another interview for last week, but this time with a person from the US (the Intel facility i'm applying to is in Mexico). The interview went waaaay better since I had acquired a lot more experience in the last few months, and so today I got a call from them again. They want to interview me on-site next week and I'm super excited and scaredWhat do you think I should expect? Do you have any tips like the ones on Dave's videos? The interviews I've had so far have been highly technical. The position is for a pre-silicon validation engineer.Thanks!!!

author: Falcon69
author_rank: Super Contributor
timestamp: April 14, 2015, 06:55:46 am
content: If your person to person interview is at their campus in Beaverton, Oregon?Don't be scared, think of it this way, if things go bad, you were looking for work when you got that call. Nothing will have changed, no reason to be scared. Now, if they pick you up from the airport, there are dressed in black and wear sunglasses even indoors, and they escort you to a black SUV, then be VERY scared.Seriously though, just relax, try and talk to the person as if you've known them forever. They can sense fear!

author: Fantasma25
author_rank: Regular Contributor
timestamp: April 14, 2015, 01:50:36 pm
content: The campus where I'm begin interviewed is in Guadalajara, Mexico :p I'll try to hide my fearThis is the first time I've been interviewed this way. Do you have any experiences to share?

author: zerorisers
author_rank: Regular Contributor
timestamp: April 14, 2015, 02:46:57 pm
content: enthusiasm and willingness to work. Prove your worth in the workplace itself after you are hired. Find the most efficient way to work using their system. That can sometimes be hard as with my internship ordering a part from the back room can take from a few hours to a week or so. and with a high-school I went to they had the most unorganized system that I could not figure out ( I am not one to ask for help usually as I try not to be a nuisance) but if you need help that will make you more efficient in the future GET IT! Stay professional at the in person interview.http://www.schooltube.com/video/45dcce49e0e7e93842ad/Job-InterviewHere is a video my current school has provided that may help you out a bit with your interview. Hope this helps, and good luck!
Intelligent 12v battery charger - Page 1
Forum section: electronics / beginners

author: TorqueRanger
author_rank: Frequent Contributor
timestamp: April 17, 2013, 05:16:09 pm
content: I have been looking around for a good quality intelligent 12v battery charger because it would just seem cheaper to build one than to buy .. Do you guys have any suggestion or plans??I found this though and it looks pretty good but will have do some research for valves
Interactive Whiteboard Panel - Page 1
Forum section: electronics / beginners

author: prashanthse
author_rank: Newbie
timestamp: June 20, 2019, 12:44:42 pm
content: Hello Everyone,Which is better for a classroom setting an Interactive Whiteboard Panel or a Projector?Thanks

author: janoc
author_rank: Super Contributor
timestamp: June 20, 2019, 04:52:25 pm
content: Quote from: prashanthse on June 20, 2019, 12:44:42 pmWhatever the teacher can use effectively.Almost anyone can connect a laptop to a projector and get going with a set of slides but with the whiteboards it can be a royal pain, depending on the vendor. Usually it ends up being used only as a projector anyway.The more gadgetry you put in the classroom the more class time will be lost getting the stuff running and fiddling with the various settings trying to get it do what it is supposed to.However, this is a bit weird question for an electronics forum, isn't it?
Interconnected terminal blocks - Page 1
Forum section: electronics / beginners

author: danners430
author_rank: Regular Contributor
timestamp: March 12, 2019, 12:28:40 pm
content: Hey guys,Silly question, but I'm having a senior moment here...I'm looking for chocolate block style terminal blocks, but the variant that are connected together with a bus bar of some description - essentially meaning that whatever you connect to one of the terminals is connected to all the other terminals.I'm afraid I've completely forgotten what these are called and what to look for!! Any ideas?Sent from my ONEPLUS A3003 using Tapatalk

author: Gyro
author_rank: Super Contributor
timestamp: March 12, 2019, 12:50:43 pm
content: Try looking for 'Neutral terminal block' as used in consumer units and industrial panels.

author: soldar
author_rank: Super Contributor
timestamp: March 12, 2019, 01:33:35 pm
content: Try searching for common bus bar terminal block.

author: danners430
author_rank: Regular Contributor
timestamp: April 16, 2019, 12:02:53 pm
content: Sorry for the delay once again in replying... one of these days I'll remember to turn on "notify" when posting topicsI'll have a look for those ideas - thanks for the help!
Interesting circuits for Oscilloscopes - Page 1
Forum section: electronics / beginners

author: SimonPbr
author_rank: Newbie
timestamp: August 31, 2015, 06:15:38 pm
content: Hey everyone,I just treated myself with a DS1054Z and have been fiddling around with it. Now my question is if there are any suggestions for fun/easy circuits that can be thrown together with some basic components that are nice to look at/mess with on an DSO and get to know all the functions (I got a good garden variaty of resistors, capacitors, diodes, mosfets, npn's, pnp's and some ic's like lm358, tl071, mc34063 etc..).Its just more fun than reading the manual and forget everything again before actually needing it in a debugging situation.I did charge/discharge a capacitor & tried to throw together a Wien bridge oscillator to generate a sine-wave using the lm358 but could not get it to work as of now..I'm happy about all kinds of suggestions and if a similar topic exists, I apologize but I did not find anything specific..Thanks in advance!

author: w2aew
author_rank: Super Contributor
timestamp: August 31, 2015, 07:14:03 pm
content: There are several described in videos on my youtube channel:Sawtooth Generator with current sources, diode switches and hysteresis comparatorControl an RC servo with an analog voltageFlexible Ramp Generator using 555Simple 3 transistor oscillator, sawtooth generatorCrystal oscillator / crystal testerVaractor diode oscillator

author: SimonPbr
author_rank: Newbie
timestamp: August 31, 2015, 07:32:32 pm
content: Awesome! That was just what I was looking for.. You got a new subscriber!I'll go straight ahead and try some of that stuff!

author: oldway
author_rank: Super Contributor
timestamp: August 31, 2015, 07:33:16 pm
content: Encyclopedia of Electronic Circuits (vol.1-6) by Rudolf F. Graf

author: ez24
author_rank: Super Contributor
timestamp: August 31, 2015, 11:57:18 pm
content: You might find something herehttps://www.eevblog.com/forum/beginners/electronics-primers-course-material-and-books/

author: dentaku
author_rank: Frequent Contributor
timestamp: September 01, 2015, 08:23:19 pm
content: Wow, I don't remember every seeing Flexible Ramp Generator using 555. That looks quite useful.
Interesting Electrical question from uni course - Page 1
Forum section: electronics / beginners

author: Jimmy
author_rank: Regular Contributor
timestamp: September 04, 2012, 07:02:06 am
content: A car travels at 100kmh?1. It will cut the vertical component of the Earth's field, which isabouta. Estimate the potential difference across the bonnet if the car is 1.5m wide (state anyassumptions you make).b. Say which side of the bonnet will be positive, if the car is heading West.

author: Rerouter
author_rank: Super Contributor
timestamp: September 04, 2012, 07:27:34 am
content: first thing i would state as an assumption would be that the car is driving along the equator and that where the car is driving is a uniform feild, at whatever earths relative magnetic feild is at sea level, as you can loose a little of your potential at other points from the magnetic feild not being perfectly spherical, equally the earths magnetic feild is spotchy with some parts stronger and weaker across the surface,driving west would mean it would be cutting feild lines head on, so the math is very easy from there, with velocity and length, still interesting,

author: free_electron
author_rank: Super Contributor
timestamp: September 04, 2012, 12:01:09 pm
content: My car is made from aluminum....

author: Rerouter
author_rank: Super Contributor
timestamp: September 04, 2012, 12:05:11 pm
content: doesnt matter, so long as its conductive,

author: 8086
author_rank: Super Contributor
timestamp: September 04, 2012, 12:19:17 pm
content: Whole bonnet at same potential, trick question