hybridfree/eevblog-posts huggingface dataset:
Video Blog Entry: ITIC 1480A USB 2.0 LS/FS/HS Protocol Analyzer Demo - Page 1
Forum section: electronics / general

author: John_ITIC
author_rank: Frequent Contributor
timestamp: October 22, 2015, 06:46:24 am
content: Published on Aug 22, 2014 by John GulbrandsenThis video describes how to use the ITIC 1480A LS/FS/HS USB Protocol Analyzer to capture high-speed USB data.The 1480A USB Protocol Analyzer can be purchased fromhttp://www.InternationalTestInstruments.com1. Overview of the 1480A front and rear panel connectors and LEDs.2. Example capture of data exchanged between a HS Sandisk flash key and a host computer. This demonstrates the host LED, Link Power and Link Activity LEDs.3. Decoding Device and Host Chirp trace data.4. Explanation of Device Requests (Set Address and others).5. Decoding device and configuration descriptors (vendor and product IDs etc).6. Explanation of Interface and Endpoint Descriptors decoding.7. Decoding of IN and OUT transactions and packets.8. Demo of how to use the Filter Dialog to hide NAKed IN Transactions and SOF packets.9. Explanation of how to use the Details View to decode Packet , bus events and transaction details.10. Shows how to use the PayLoad View to display hex and ASCI payload data of packets and transactions.11. Explains how to use markers and time references.12. Demo of the Node Finder View and how to use it to find packets and bus events in the overall trace.13. Comparison of capabilities between software and hardware based protocol analyzers.14. Description of OTG SRP, VBus and HNP events.15. Use of payload view to watch raw payload data of data and transactions.16. Functionality of the Message View. Shows lowest-level D+ and D- data line states as well as packets and data content.17. Description of the Discovered Devices View. It shows all discovered devices via use of the device descriptors obtained from the devices in the trace.18. Demo of the Print and Print Preview functionality.19. Overview of the 2500A PCI Express Protocol Analyzer software, which has many advanced features that will be integrated into a 1480B version of the USB Protocol analyzer.20. Demo of the Search Payload Data dialog. How to find the "Cruzer Blade" string in the overall protocol trace capture.21. More complete overview of the Filter Protocol Items Dialog box.22. Explanation of how to use the Filter Dialog to hide traffic to/from specific devices or endpoints.23. Demo of relative and absolute timestamps and how to change the time reference in the trace.24. Description of the 1480A Printed Circuit Board. PHY, FPGA, SDRAM and FX2LP microcontroller.25. Description of planned 1480B USB Protocol Analyzer hardware changes (256 MB trace RAM and external trigger port).
Video Blog Entry: A History of PC Buses - From ISA to PCI Express  - Page 1
Forum section: electronics / general

author: John_ITIC
author_rank: Frequent Contributor
timestamp: October 21, 2015, 11:23:23 pm
content: Published on Oct 21, 2015This presentation explains the major expansion buses used by the PC platform up until PCI Express between the years of 1981 to 2004:1) Introduction2-4) ISA (Industry Standard Architecture)5-6) MCA (Micro Channel Architecture)7-9) EISA (Extended Industry Standard Architecture10-12) VLB (VESA Local Bus)13-17) PCI (Peripheral Component Interconnect)18-20) PCI-X (Peripheral Component Interconnect - Extended)21-24) PCI Express25) SummaryThis is the 2nd of many videos explaining practical concepts surrounding high-speed board design, FPGA digital design as well as software engineering.-----------------------------------------------------------------------------------------------------------------------------------I currently accept new consulting projects. To contact me, please email John@SummitSoftConsulting.com or visithttp://www.SummitSoftConsulting.comand send me a message.
A fairly new blog that deserves a lot more views - Page 1
Forum section: electronics / general

author: Mashpriborintorg
author_rank: Regular Contributor
timestamp: November 09, 2015, 05:26:07 pm
content: The dude started with teardowns of incredibly expensive server stuff, and now just published a part 1 of avionics teardowns:https://www.youtube.com/user/chrigel1234/videos

author: Mashpriborintorg
author_rank: Regular Contributor
timestamp: November 09, 2015, 05:47:43 pm
content: Avionics freaks may like this other channel too :https://www.youtube.com/user/Sigmatechnica/videos

author: PA0PBZ
author_rank: Super Contributor
timestamp: November 09, 2015, 07:50:56 pm
content: Or this one:https://www.youtube.com/user/msylvain59/featuredIt's a mix of consumer electronics and aviation teardowns, a whole lot of it.

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 10, 2015, 05:43:37 am
content: Subscribed to all of them and subscribing to this thread!

author: dexters_lab
author_rank: Unknown
timestamp: November 10, 2015, 09:31:15 am
content: subbed, thanks for the tip
A video tour around my old time shop and ham shack - Page 1
Forum section: electronics / general

author: Radio Tech
author_rank: Frequent Contributor
timestamp: September 26, 2015, 11:05:35 pm
content: In this video we have a quick look around my shop and ham shack. Most of my equipment is old and bough in non-working state. I like buying stuff and repairing it to use for myself. Don’t expect to see a lot of flashy new gear here. Hope you enjoy this cluttered mess I call my playground. I spend many hours in the shop and enjoy working on gear of all types. The old computers in the one room are using for programming Eproms like the 27C128 and 27C64 chips. These were used in some older radios.With all this ld stuff Dave may think I am a grey beard

author: EEVblog
author_rank: Unknown
timestamp: September 28, 2015, 01:14:16 am
content: Nice lab, thanks for the tour.That Owon looks totally out of place!The fold down whiteboard is a good use of space.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: September 28, 2015, 01:36:21 am
content: Quote from: EEVblog on September 28, 2015, 01:14:16 amWhy thank you sir.I agree, that Owon needs to go lol. Honestly, when you did the first review on the Rigol DS1052E I thought I needed to get a DSO. At that time I could not afford the Rigol so went with the Owon. Now I very seldom use it other than video capture. A few weeks later I picked up the two Tek 2235 scopes for about 25 bucks each. I think now I want the 1054z. The Owon, on a scale from 1 - 10, I give it a 5. For a 60 MHz scope I much prefer my old Sencore.Every wall in the lab has either shelves or component cabinets on it. So I decided to hinge it from the ceiling so I have access to it when doing videos. Worked out real nice.Thanks for your comments.

author: GreyWoolfe
author_rank: Unknown
timestamp: September 29, 2015, 09:18:17 pm
content: , nice setup.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: September 29, 2015, 11:36:31 pm
content: Quote from: GreyWoolfe on September 29, 2015, 09:18:17 pmThank you very muchNice to see responses.

author: Vgkid
author_rank: Super Contributor
timestamp: October 01, 2015, 04:49:51 am
content: Thanks for the video, I got a chuckle out of the power supply built inside another(dead) power supply.You HAM guys are pretty serious about your gear.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: October 01, 2015, 09:19:55 am
content: Quote from: Vgkid on October 01, 2015, 04:49:51 amThank you.If it is the supply you are refearing to, I bought it just for the insides. I built a homebrew 6 meter rig a few years ago and used the supply in the radio. Leaving me with an empty case to have a go at. I think that one has a LM317 in it, cant remember lol.Thank you for your kind words.
Interesting project information  getting lost ! Please help finding a solution ! - Page 1
Forum section: electronics / general

author: hary
author_rank: Contributor
timestamp: October 09, 2015, 10:51:10 am
content: Hi there.I hope this is the right place to post.Some time ago, I've found a very interesting project related to ACCURATE VOLTMETER and provided by a web site called "provideyourown".http://www.provideyourown.com/2012/secret-arduino-voltmeter-measure-battery-voltage/There was all kind of other interesting stuff on this site, indeed !When I now google it, I find some links but they link to nowhere !Some links inspired from the project I'm talking about :http://www.instructables.com/id/Secret-Arduino-Voltmeter/In the next link, (Tinkerit), it is a "READ-ONLY" status and may soon disapea (January 2016)rhttps://code.google.com/p/tinkerit/wiki/SecretVoltmeterCould somebody confortable with internet stuff, may help to find back the original information ("provideyourown" website) and maybe safely store it in a safe way before it's lost !Many thanks.

author: PA0PBZ
author_rank: Super Contributor
timestamp: October 09, 2015, 11:00:33 am
content: The way back machine will solve that for you (archive.org)http://web.archive.org/web/20150329175309/http://provideyourown.com/2012/secret-arduino-voltmeter-measure-battery-voltage/

author: hary
author_rank: Contributor
timestamp: October 09, 2015, 12:35:47 pm
content: Thanks you very much !And thanks to this archive.org's feature.The only problem is that google won't find it !If you don't know the adress you want to reach or don't know archive.org, no way to get it !A shame for people seeking information on the subjet.

author: Seekonk
author_rank: Super Contributor
timestamp: October 09, 2015, 12:50:27 pm
content: Nice article. First time I did a temperature project the temperature reading changed when the laptop was plugged in. The USB 5V was higher than the boards regulator changing the readings. This is a trap many fall into. I modified a USB cable by cutting the 5V line and inserting back to back diodes. That insured that it always ran on the boards regulator.

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 09, 2015, 11:02:42 pm
content: Quote from: hary on October 09, 2015, 12:35:47 pmMy theory on why that's the case is that Google doesn't want to store the Wayback Machine's archive, because it's quite large.

author: eas
author_rank: Frequent Contributor
timestamp: October 12, 2015, 06:29:55 pm
content: Quote from: crispy_tofu on October 09, 2015, 11:02:42 pmAnd they already have their own...
Diode noise investigation - Page 1
Forum section: electronics / general

author: idpromnut
author_rank: Unknown
timestamp: September 23, 2015, 04:42:48 pm
content: While examining the schematic for the Power Designs 6050A power supply, I came across a couple of capacitors that compelled me to look closer.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 23, 2015, 06:30:01 pm
content: Yep, recovery noise is well known. In this case it might even just be common mode picked up from your wiring, and the diodes being on or off (but not the switching or conduction itself) is simply gating that from your probe.You actually won't observe any recovery, because 1N4148 is very fast. 1N400x series are very slow (a few us), and will make troublesome RFI even at line frequencies. This is audible using an AM/SW radio and, for the antenna, an inductive loop probe held near the rectifier in most equipment.The act of a diode going from low impedance to high impedance excites resonances around it, particularly Cj versus wiring inductance. If the inductance is known (or can be estimated), then the ideal solution is to use an R+C in parallel with each diode, where C >= 2.5*Cjo, and R = sqrt(L/Cjo). Often, C >> Cjo is used (e.g., 10nF), which has the effect of dropping sqrt(L/Cjo) so that the resonance, though still present, is just too much of a "thud" to care about.Tim
I have a youtube channel with weird stuff teardowns - Page 1
Forum section: electronics / general

author: Mashpriborintorg
author_rank: Regular Contributor
timestamp: September 09, 2015, 10:37:04 am
content: Hi,If you have curious about how stuff like avionics, military electronics are made, my channel is for your viewing pleasure !One of my more popular videos:https://youtu.be/PsxDOUnO9TkAll of my videos:https://www.youtube.com/user/msylvain59/videosEnjoy !

author: Vgkid
author_rank: Super Contributor
timestamp: September 10, 2015, 01:03:18 am
content: Your channel looks interesting, will subscribe.I believe that I have seen your stuff before.

author: albert22
author_rank: Regular Contributor
timestamp: September 10, 2015, 01:11:43 pm
content: Interesting to see all that unusual stuff.Thanks

author: AF6LJ
author_rank: Unknown
timestamp: September 10, 2015, 01:44:22 pm
content: This will be Good.

author: firewalker
author_rank: Super Contributor
timestamp: September 10, 2015, 02:38:57 pm
content: Your channel is already mentioned by mikeselectricstuff.https://www.eevblog.com/forum/reviews/someone-ese-doing-oddball-teardowns/Alexander.

author: SeanB
author_rank: Super Contributor
timestamp: September 10, 2015, 05:05:59 pm
content: Already a subscriber, there is a lot of stuff you get, which is both a mix of Russian and European military hardware. I like the flight computer dismantling you did recently, along with the sensor heads of that Russian heat seeking missile as well.

author: gilbenl
author_rank: Regular Contributor
timestamp: September 11, 2015, 10:27:38 pm
content: Enjoyed the sperry flight computer teardown. Nice job!

author: dexters_lab
author_rank: Unknown
timestamp: September 15, 2015, 11:41:37 am
content: nice to see you posting herekeep up the great teardowns, you really do find some unusual items!
Check out the last video from the Signal Path Blog ! - Page 1
Forum section: electronics / general

author: jipihorn
author_rank: Contributor
timestamp: August 24, 2015, 09:25:18 am
content: This guy is great !Jérôme

author: pickle9000
author_rank: Super Contributor
timestamp: August 24, 2015, 09:37:06 am
content: Dave should make one, and so should everyone else that can.Great job.

author: jipihorn
author_rank: Contributor
timestamp: August 24, 2015, 11:59:01 am
content: In fact, I've been watching his channel from the beginning and everybody agrees that he is making very high qulity content.I've pointed out this very specific episode because his message is what I consider the essence of right thinking.This is similar to what Dave's thinking, though.Check out the Amp-hour episode too where he describes his job at Bell Labs (where 1 GHz is considered DC...). Competence at its best.Jérôme.

author: EEVblog
author_rank: Unknown
timestamp: August 24, 2015, 12:26:26 pm
content: Quote from: pickle9000 on August 24, 2015, 09:37:06 amThankfully, still shows up in the top 10 videos when searching "free energy" or "overunity", and 210K views. Hopefully is helps some people

author: alsetalokin4017
author_rank: Super Contributor
timestamp: August 24, 2015, 12:56:12 pm
content: You call that a Free Energy device? That's not a Free Energy device! _This_ is a Free Energy device!

author: eas
author_rank: Frequent Contributor
timestamp: August 27, 2015, 06:28:34 pm
content: Quote from: alsetalokin4017 on August 24, 2015, 12:56:12 pmThe greenback carpeting really ties the room together.

author: kezat
author_rank: Contributor
timestamp: September 02, 2015, 08:46:15 pm
content: Pffft, needs more inductors and heat sinks, after all heat sinks just scream efficiency and inductors just look cool and scienceyQuote from: alsetalokin4017 on August 24, 2015, 12:56:12 pm

author: SundayProgrammer
author_rank: Contributor
timestamp: September 03, 2015, 06:01:05 am
content: The latest is interesting FPA video.Axel.

author: R_G_B_
author_rank: Frequent Contributor
timestamp: September 07, 2015, 07:21:27 pm
content: More free energy for David L jones to inspecthttp://jnaudin.free.fr/R_G_B

author: Quarlo Klobrigney
author_rank: Super Contributor
timestamp: September 07, 2015, 07:26:31 pm
content: It's all about the way that you wind the coil. If you do it wrong, it can't tap into the "special" energy. The whole process uses hyperdimensional physics that us laymen could not possibly understand.By winding the coils at 19.5°, in relation to the Earth's core, the Aether can be tapped, similar to the physics that Dick Hoagland has explained.

author: Quarlo Klobrigney
author_rank: Super Contributor
timestamp: September 07, 2015, 07:33:52 pm
content: One of the hucksters that I feel bad for because of his age is John Searl, inventor of the "Searl Effect" and his "Law of Squares". Let you fingers and Google do the walking.....Here let me help:Of course you can't make the device yourself, but you can send money so that he can!But wait, there's more! The sheep ship gets even deeper:
My blog - Page 1
Forum section: electronics / general

author: Lesterwyatt
author_rank: Regular Contributor
timestamp: November 08, 2015, 09:02:17 am
content: Hello. Just thought I would share me playing around in my lab. Nothing heavy just a few projects I have been working on. Follow link:https://m.youtube.com/channel/UCClA4ezBnhsdD1bDoQX6wJwThanks Lester

author: Radio Tech
author_rank: Frequent Contributor
timestamp: November 08, 2015, 11:59:08 am
content: Nice,Thanks for sharing.
Mailbag, thought I have a go :) - Page 1
Forum section: electronics / general

author: mswhin63
author_rank: Frequent Contributor
timestamp: July 29, 2015, 12:44:03 pm
content: Seeing that most people are doing it, thought I would have a go. only one item to test the waters, included a review with it as well.I have noted a couple of things with the item after doing the post which I will cover in later videos.http://youtu.be/mYdv5jLv4ZY

author: Muttley Snickers
author_rank: Unknown
timestamp: July 29, 2015, 01:35:05 pm
content: ...A thumbs up from me, very informative and easy to listen to, I wasn't aware of these devices and assume they are a direct replacement for a current shunt or possibly prior to one, I wondered if they made a version that could output a lower voltage or if the output could be reduced for say 200 mv panel meters, I also suspect as you pointed out that those terminal blocks are rated at far less than 30 amp,PM me your details if you have plans for more, that other bloke gets more than he can handle....Aussie Accent...Keysight Meter...I learnt something newMuttley
To whom it may concern: N vs. P channel MOSFETs.  - Page 1
Forum section: electronics / general

author: ElectroIrradiator
author_rank: Frequent Contributor
timestamp: August 04, 2015, 02:04:33 pm
content: (Yes, I do believe this is in the right forum section.)Please be adviced that usually youcannot replace an N channel MOSFET with a P channel ditto without suffering some dire consequences. That is why the first replacement MOSFET instantly blew up when you applied power. You shorted out the battery through the body diode, and the current was only limited by the DC resistance of the transformer.Otherwise enjoyed the video as always.Message meant for a fairly narrow selection of 'you'.

author: McBryce
author_rank: Super Contributor
timestamp: August 04, 2015, 02:11:21 pm
content: That's a VERY narrow "you" indeed. Any chance of a link to the video?McBryce.

author: ElectroIrradiator
author_rank: Frequent Contributor
timestamp: August 04, 2015, 02:13:02 pm
content: ApparentlyShahriarand I were typing our respective posts at the same time.Edit: I spelled Mr. S' name incorrectly...

author: McBryce
author_rank: Super Contributor
timestamp: August 04, 2015, 02:20:07 pm
content: It wouldn't be a Shahriar video if nothing exploded or caught fireMcBryce.

author: dadler
author_rank: Unknown
timestamp: August 05, 2015, 02:19:26 am
content: I am supremely confident that Shahriar knows the difference between P and N channel mosfets, considering he has a Ph.d in EE and works at Bell Labs (engineering manager, designing microwave-frequency ASICs)--in the building where the transistor was invented.

author: ElectroIrradiator
author_rank: Frequent Contributor
timestamp: August 05, 2015, 07:55:33 am
content: Quote from: dadler on August 05, 2015, 02:19:26 amI know about his background in general terms.I am also supremely confident that we all make thosemistakes from time to time.

author: MagicSmoker
author_rank: Super Contributor
timestamp: August 05, 2015, 10:53:35 pm
content: Quote from: ElectroIrradiator on August 05, 2015, 07:55:33 amYes, this. I am always impressed when someone with a stellar pedigree does something exceptional stupid but still owns up to it; conversely, I am totally unamused when some wet-behind-the-ears intern blames an incomplete datasheet or the like for his/her failure.

author: dadler
author_rank: Unknown
timestamp: August 06, 2015, 12:15:02 am
content: In this case though, Shahriar just showed the wrong datasheet in the video. The newly-toasted mosfet in question was indeed N channel and actually only rated for 400mA. Hence why the to-220 mosfet was getting super hot, as the dc converter circuit really pulls a lot of current.

author: Hugoneus
author_rank: Frequent Contributor
timestamp: August 21, 2015, 04:11:00 pm
content: I just saw this!In this case I showed the wrong datasheet in the video. As I was searching for replacement parts I downloaded many datasheets in the process. I added a note to the video.Indeed if a PMOS would be used, it would put the DC-DC converter in positive feedback and would surely destroy the device in question.
DIY portable selfie light - Page 1
Forum section: electronics / general

author: will9twl
author_rank: Contributor
timestamp: July 27, 2015, 07:22:26 am
content: "But first, let me take a #selfie"DIY portable selfie light @fusion2xhttp://omgbazinga.com/blog/index.php/component/k2/item/11-diy-portable-selfie-light

author: BravoV
author_rank: Super Contributor
timestamp: July 27, 2015, 07:30:44 am
content: My 2 cents comments :1st, led needs constant current driven, driving it using constant voltage is not good for the led's life.2nd, dissipating the led's heat straight at the power bank body with no thermal cut off or monitoring which contains the Li-Ion cells is not good for ... your life.Oh , last one, putting a spam at your sig also is annoying.

author: will9twl
author_rank: Contributor
timestamp: July 29, 2015, 02:08:24 am
content: Hi BravoVThanks for those good points! Noted the sig and reduced the estate. LEDs with internal resistance doesn't require current-driven power source. Also, a newer version is being worked on with additional features after our demos.
We need more USB ports - Page 1
Forum section: electronics / general

author: will9twl
author_rank: Contributor
timestamp: July 29, 2015, 01:32:35 am
content: In a post-PC era, designers like ourselves might need more than just one USB port on our tablets/ultrabooks.Check out our latest blog post as we build our own USB hub for our Microsoft Surface Pro 3.http://omgbazinga.com/blog/index.php/component/k2/item/12-we-need-more-usb-ports
10MHz GPSDO Frequency Reference Modifications - Page 1
Forum section: electronics / general

author: SteveyG
author_rank: Unknown
timestamp: August 09, 2015, 11:38:28 am
content: This is the final part on the GPSDO which I've modified to give a 10MHz output, RS-485 time link and provision for a Microchip 2.4GHz MiWi link. Following on from this, I will be modifying a video distribution amplifier to feed the 10MHz to my equipment in the lab.https://sdgelectronics.co.uk/10mhz-frequency-reference-gpsdo/

author: Vgkid
author_rank: Super Contributor
timestamp: August 12, 2015, 09:40:01 am
content: Thanks for the video, your front panel turned out nicely.
Empower your projects with Bluetooth Smart - Page 1
Forum section: electronics / general

author: will9twl
author_rank: Contributor
timestamp: July 20, 2015, 09:38:53 am
content: Hi allDo check out our blog post on Bluetooth Smart as we study its past-present-future and the various options in the market.http://omgbazinga.com/blog/index.php/component/k2/item/9-empower-your-projects-with-bluetooth-smartCheers!--@will9twl
Not EE Specific - but Dave should like this - Apollo 11 launch anniversary - Page 1
Forum section: electronics / general

author: kphannan
author_rank: Unknown
timestamp: July 16, 2015, 02:55:46 pm
content: Today 7/16 is the Anniversary of the Launch of Apollo 11 (7/16/1969).http://t.co/x5t7UnDqgK7/20 is the anniversary of Neil Armstrong's first step on the Moon.
SDGEE #022 Cambridge Audio A4 Amplifier Modifications - Page 1
Forum section: electronics / general

author: SteveyG
author_rank: Unknown
timestamp: June 28, 2015, 08:01:35 am
content: In this video, I disassemble a Cambridge Audio A4 Integrated Amplifier which was rescued before it was thrown away.The amplifier is refurbished with new electrolytic capacitors and a clean inside before performing a modification to make the dials on the front panel glow.
Solartron LM1619 Digital Volt Meter (with nixies!) - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: October 14, 2015, 08:27:13 am
content: Did a teardown on a solartron lm1619 digital volt meter the other day, thought some of you might like to see.dates from the early 1970 from what i can gather.

author: edpalmer42
author_rank: Super Contributor
timestamp: October 14, 2015, 05:19:12 pm
content: The BTY>14V setting is probably to check the voltage of the internal battery.Do you know the purpose of the standard cell? After this many years, the cell is probably dead and yet the unit seems to be working properly so the cell can't be part of the measurement process.Ed

author: Andy Watson
author_rank: Super Contributor
timestamp: October 14, 2015, 05:37:15 pm
content: When I started work, sometime in the 1980s, we had the DC only version of this meter. It was the only half-decent bit of kit that we had! The "Cal" position measures the voltage on the standard-cell and there's the screwdriver adjustment to bring it into alignment. I had always assumed that the standard was some sort of compensated zener (or such like) - never dreamed that they would put a standard cell in the unit!

author: Macbeth
author_rank: Super Contributor
timestamp: October 14, 2015, 06:09:06 pm
content: Aha, so CAL10185 means set it to 1.0185 volts!I never would have believed an actual Weston cell would be used as an internal reference.

author: dexters_lab
author_rank: Unknown
timestamp: October 14, 2015, 07:05:10 pm
content: i had a quick look at it today, if i adjust the cal on the solartron against my bench PSU and my bench meter and switch back to the cal range on the solartron the value is 1.017 so i guess the cell is past its besti also noticed today the AC ranges are completely deadi am tempted to hack this into a nixie clock, or would that be wrong?

author: edpalmer42
author_rank: Super Contributor
timestamp: October 14, 2015, 07:11:18 pm
content: Quote from: Macbeth on October 14, 2015, 06:09:06 pmSounds likely, but that's confusing for a couple of reasons. First, the meter can't display 1.0185. Second, since there's no temperature control it's going to be an unsaturated cell. They have voltages in the 1V019x range. EOL is considered to be 1V0183 according to NBS Monograph 84.Ed

author: dexters_lab
author_rank: Unknown
timestamp: October 14, 2015, 07:22:36 pm
content: Quote from: edpalmer42 on October 14, 2015, 07:11:18 pmi guess it would have been explained in the user guide and there was probably a recommended time period to change the celli am looking for a user guide/service manual, if anyone sees one, let me know!
Wavetek 859 Pulse Generator Teardown and Repair - Page 1
Forum section: electronics / general

author: AlphZeta
author_rank: Regular Contributor
timestamp: June 14, 2015, 07:24:55 pm
content: I recently did a teardown and repair of a Wavetek 859 50 MHz pulse generator.This is a really old school pulse generator (made in the 80's), but is still a nice equipment to have in the lab. If you want to read my blog posts rather than watching the video, you can find them onhttp://www.kerrywong.com.

author: AlphZeta
author_rank: Regular Contributor
timestamp: June 16, 2015, 12:37:35 am
content: By the way, does anyone by any chance know the GPIB command format for this unit? It would probably be much easier accessing it through GPIB than via the front panel.
Electron microscope slow-motion video of vinyl LP - Page 1
Forum section: electronics / general

author: dexters_lab
author_rank: Unknown
timestamp: June 15, 2015, 07:27:54 am
content: Some great work from Ben of Applied Science to get stop-motion animation of a record needle

author: Melt-O-Tronic
author_rank: Frequent Contributor
timestamp: June 15, 2015, 07:37:38 am
content: Ben has some awesome videos and this is one of the most interesting. The only thing that would make them better is more detail and more of them.

author: mcinque
author_rank: Unknown
timestamp: June 15, 2015, 11:28:46 am
content: amazing!

author: miguelvp
author_rank: Super Contributor
timestamp: June 15, 2015, 03:46:49 pm
content: Not bad for someone that built his own electron microscope years back.

author: HighVoltage
author_rank: Super Contributor
timestamp: June 15, 2015, 07:14:11 pm
content: He has many great videos and there is always something to learn from.This was pretty cool.Thanks for sharing this

author: orion242
author_rank: Unknown
timestamp: June 15, 2015, 07:20:03 pm
content: He always seems to have Great videos.Wonder how many people on the planet can claim they a electron microscope @ home?
SDGEE #017 Peak Electronics LCR45 LCR Meter Review and Teardown - Page 1
Forum section: electronics / general

author: SteveyG
author_rank: Unknown
timestamp: June 09, 2015, 08:08:32 am
content: A look at the Peak Electronics LCR45 LCR Meter from Peak Electronics

author: neslekkim
author_rank: Super Contributor
timestamp: June 10, 2015, 03:22:17 pm
content: Maybe it's just me, but it looks like an DCA75, not an LCR45

author: SteveyG
author_rank: Unknown
timestamp: June 11, 2015, 06:08:48 am
content: Quote from: neslekkim on June 10, 2015, 03:22:17 pmWow, indeed it was. Sorry for the error - fixed now...

author: neslekkim
author_rank: Super Contributor
timestamp: June 11, 2015, 11:15:07 am
content: Quote from: SteveyG on June 11, 2015, 06:08:48 amIs there any hope for an ZEN review?

author: SteveyG
author_rank: Unknown
timestamp: June 12, 2015, 09:04:54 am
content: Yes, I have one now which I can review in the next few weeks.

author: neslekkim
author_rank: Super Contributor
timestamp: June 12, 2015, 01:17:20 pm
content: Ah, cool, I'm interested in that one since it can be used with leds, but not sure if it can be used with high power cob ledsSent from my SM-N9005 using Tapatalk
TPAI Lab Report # 001: Reverse Engineering / Welding Machines  - Page 1
Forum section: electronics / general

author: orion242
author_rank: Unknown
timestamp: June 20, 2015, 01:05:49 am
content: https://youtu.be/9rhGUkbqwCULOL Love the wine tip. Should have a quick beverage review / tip in each video for those of us that want to drink along at home.For the seal, auto mechanics get sheets of gasket material and cut their own if one cannot be had. Goggling around should come up with something suitable.http://www.grainger.com/category/rubber-sheets-and-strips/rubber/raw-materials/ecatalog/N-c1z

author: SeanB
author_rank: Super Contributor
timestamp: June 20, 2015, 07:47:42 am
content: Gaskets are often the back or front cover of the phone book ( about the only time I use it these days) and some gasket compound. Making them is either by using a small cutter, some scissors or the small ball peen hammer to tap out the shape. Works for all thin gaskets, other than head gaskets, cork or thick rubber gaskets.I did buy a few sheets of proper gasket material recently, to make some gaskets that were needed to do preload of bearings in a gearbox, which did not have any other preload method. Ended up sanding some down to get the right thickness, as the original did not have any specs and the gaskets disintegrated on removal. Also added the one thing missing ( and the cause of the failure in the first place), which was a gearbox vent, the lack of which had blown the seals and dumped the oil into the drive motor, which did not like that at all.
SDGEE #021 2.3" 6 Digit LED Clock Build - Page 1
Forum section: electronics / general

author: SteveyG
author_rank: Unknown
timestamp: June 01, 2015, 06:46:21 am
content: I recently built a 6 digit LED clock from some 2.3" red 7 segment displaysFor anyone interested, I've uploaded the schematics and firmware to my website and uploaded a YouTube video. Enjoy!http://sdgelectronics.co.uk/ledclock-projects/

author: hgg
author_rank: Frequent Contributor
timestamp: June 01, 2015, 10:07:57 am
content: Cool project!Nice work and programming.I really liked the OLED version. Any schematics for that?These 7 segment displays look like they are of very good quality! The only problem for me isthe multiplexing that produces flickering and can be irritating especially when you look at itwith averted vision. Its not noticeable by everyone though.250hz its not bad, but how fast can you make the update rate?Alternatively is it possible to add some sort of fade off delay with capacitors for the segments?This way the flickering will be much less noticeable. Maybe you can leave a lower delay for theseconds segment.If you add a red filter on top of the segments the contrast will increase dramatically.Nice work!George.

author: SteveyG
author_rank: Unknown
timestamp: June 01, 2015, 10:23:08 am
content: The microcontroller is barely breaking a sweat at 250Hz, so it's likely that the refresh rate could be increased by an order of magnitude without any issues. This would simply be a change to the Timer 2 configuration in the code. The 250Hz was chosen so that it didn't cause odd effects with the camera.Adding capacitors wouldn't work with the circuitry in it's current configuration. I'd advise changing to latches or shift registers and driving the displays statically if the multiplexing is irritating.I'll have to re-visit the OLED clock at some point and tidy it up. I'll produce some schematics for that at the same time.Thanks!

author: hgg
author_rank: Frequent Contributor
timestamp: June 01, 2015, 11:14:34 am
content: QuoteIs it more work to drive them statically? Almost all of the 7 segment display applications I've seen, haveused multiplexing.QuoteI will wait for that!Thanks.

author: SteveyG
author_rank: Unknown
timestamp: June 01, 2015, 12:07:06 pm
content: It does add to the bill of materials, and makes things a bit less compact, but there are some situations where they are not multiplexed. I've seen it a lot in legacy medical applications as it was simpler to detect segment failure back then.

author: hgg
author_rank: Frequent Contributor
timestamp: June 01, 2015, 12:09:19 pm
content: Interesting.Thanks again.
Guest Request: John Kenny Returns? - Page 1
Forum section: electronics / general

author: jumper385
author_rank: Newbie
timestamp: October 06, 2025, 04:54:23 pm
content: Every year, i keep coming back to the John Kenny Interview. It is ABSOLUTELY FANTASTIC interview!https://youtu.be/WoRJOCdNahcI'm wondering @Dave and @Chris, Do you have any strings to pull to get him back on the Amp Hour? I'd imagine he's got so much to say about the last 7 years! Would like to hear about the transition to linux systems with the oscilloscopes and how Keysight has faired 7 years from that chat.Would like to also love to hear what Chris has to ask the guy seeing as he briefly worked for tek/fluke!SURELYYY!!!!
JOB: AmpHOur EDITOR REQUIRED - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: January 28, 2025, 11:59:19 pm
content: The Amp Hour podcast is in need of a new audio editor to take the raw recorded footage from our shows and edit it into a finished audio file suitable for podcasting.Shows are usually an hour long with two guests, but can be longer or more complicated.All the usual stuff is needed, levelisation, muting talk-overs, um's and ah's, coughs, maybe noise reduction etc.We are after someone with specific previous experience editing podcasts or other audio productions. Please, if you do not have previous commercial experience editing audio, do not apply.Apart from the experience we don't care who you are or where you are based, it's a remote work gig.Email your hourly rate, evidence of experience and a screen shot of a timeline you have done to theamphour@gmail.com
Chris live streaming? - Page 1
Forum section: electronics / general

author: Peabody
author_rank: Super Contributor
timestamp: September 24, 2024, 11:22:26 pm
content: Near the end of the last episode, Chris mentioned that he has been live streaming, but didn't say where. Does anyone know?

author: oPossum
author_rank: Super Contributor
timestamp: September 25, 2024, 12:35:02 am
content: https://www.youtube.com/@GoliothOfficial/streamshttps://www.youtube.com/@GoliothOfficial/videos
#659 – Altium…Acquired! - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: February 21, 2024, 12:57:16 am
content: https://theamphour.com/659-altium-acquired/octopart has not been working properly for many yearsi dont know if they fixed anythingeg : selecting resistor, some value/model, then a distributor, the result is a garbage un-intuitive mix of everythingand the sorting horror, the numbers are all jumbled

author: thinkfat
author_rank: Unknown
timestamp: February 21, 2024, 07:13:58 pm
content: They're going to raise prices again, for sure. Renesas spent $5.9 billion on Altium, Altium has to earn that money now.
#656 Pneumatic Tubes, Straight To The Home - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: February 09, 2024, 07:01:54 am
content: https://theamphour.com/656-pneumatic-tubes-straight-to-the-home/Dave just drove 4500 km / ~ 2800 milesDumpster room tier on Patreon?Hyperloop failureFlorida train video (Wendover)PipedreamSeries of tubesGuam capsizeHugo site builder, based on GoDreamweaverChris recommends buying a foldable lightbox (Light this)Chris’s blog post when he was going to meet Dave for the first timeDehumidifiers are raising money based on ridiculous hypeSpec Sheet for Genesis SystemsChris just got a chest freezer, was surprised at the low energy needsPower chargesTexas grid article on NYT after recent deep freezeEnergy mix in NCBeta voltaicUsed for aerospaceBantam Tools (Bre Pettis) acquires Evil Mad Scientist (Lenore, Windell)Vulnerabilities in the ESP32 RISC V partsWill people make tools to make it easier to crack into something, like discussoned the CAN episode with Ken TindellDave might get a free pick and place, the TVM920Video about the 1980s “drink robots”Chris’s daughter is really into robots and gondolasPool robots videos on EEVblog2
#655 12th day of KEYZERMAS - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: January 16, 2024, 06:37:16 am
content: Jeff Keyzer of Mightyohm.comjoins Chris for a later-than-usual holiday episoderecording on what will be known as The Twelfth Day of Keyzermaswhat is akeyzermas?https://theamphour.com/?s=keyzermas
#650 - Accessible ASICs with Andreas Olofsson (adapteva/parallella/zero-asic) - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: November 19, 2023, 05:58:38 am
content: https://www.digikey.com/en/product-highlight/a/adapteva/parallella-boardhttps://en.wikipedia.org/wiki/Zero_ASICreference to chiplets #499
No new episodes? - Page 1
Forum section: electronics / general

author: Peabody
author_rank: Super Contributor
timestamp: September 27, 2023, 04:57:29 pm
content: The last episode on the website is #646 issued 9/11, which is over two weeks ago. Well, perhaps something has happened.

author: Bloch
author_rank: Unknown
timestamp: October 10, 2023, 06:12:44 pm
content: New podcast #647 is up now.
#674 turtles as a service - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: August 15, 2024, 07:45:53 pm
content: https://theamphour.com/674-turtles-as-a-service/summary from amphour website :MurphyMore efficient with cooled panelsBattery storage solutionServer rack batteriesChris has been doing hardware LivestreamsGeofencen8n, Similar to Zapier, IFTTTHome assistantEE Grad wants some insight on new techhttps://4dsystems.com.au/Scott Williams of Xentronix recorded with Dave and then ChrisSaw at ElectronexMy Cousin VinnyEmbedded World North America is happening in Austin in October. There is a vendor map now.VoltnutsOpen source bookTiny TapeoutTantalum Caps from AliExpressWhat’s next for ASMLBen Krasnow printing PCB traces againending bonus : asianometry mentioned
#619 super tecmo bug - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: February 15, 2023, 11:28:48 pm
content: 0:00:00 start0:04:10 chatGPT0:06:15 lasercutting0:10.12 R&S n coding bugs0:21:40 TEK 2 bugs0:25:45 Brymen meter - flash firmware0:26:55 $0.0x MCUs - PUYA0:32:55 what is the coolest prototype you could build with $100?0:35:50 google cancelled their tpu0:41:50 Rpi arcade emulator0:46:45 new mustang SUV EV has an extra mile of cables0:55:20 enphase bidirectional EV charging0:57:41 Atlas technologies / lightyear is bankrupt1:00:43 green credit / ESG / carbon credit1:07:22 TESLA has dropped the AM radio?1:09:57 catch you next time
#196 (recast 01-08-22) An Interview with Mike Engelhardt (LTspice) + bonus - Page 1
Forum section: electronics / general

author: 3roomlab
author_rank: Frequent Contributor
timestamp: August 20, 2022, 06:10:37 am
content: 6 episode video : Mike Engelhardt on LTspice

author: 3roomlab
author_rank: Frequent Contributor
timestamp: September 21, 2022, 10:38:47 pm
content: The below is not part of the video aboveBut I leave it here for referenceBy chance I was fiddling with these and figured out how it works4 parameters are requiredRtot = total potentiometer RWiper = 0.01 to 0.99 relative position of wiperRtap = "curvature" of log curveTap = 1 for Nlog / 0.01 for Plog(I editted the symbol roughly)run a test  sim and we get this(rename *txt to *lib)edit : to note are the pin assignment which will make cw/ccw turning relevantIn Plog 1 = cw 2 =ccwIn Nlog 1 = cw 2 =ccwWe get a log pot and a reverse log pot (useful for audio sims)
#598 - Helium - Page 1
Forum section: electronics / general

author: Peabody
author_rank: Super Contributor
timestamp: August 08, 2022, 11:19:47 pm
content: The Helium network and associated cryptocurrency were discussed at the end of this episode. Previous guest Andreas Spiess had a video on this over a year ago, and got it right:To the nearest approximation, nobody is using this network, and nobody wants to use it. But the runup in the crypto gave all the early players good profits just from having their gateways up and running. Why did the runup take place? For the same reason Bitcoin had its runup, I suspect, which is what has always bothered me about this stuff. But Dave likes it, so I must be wrong. After all, the fine art market has operated on the same basis for centuries, and there's no sign that's going to crash.

author: ataradov
author_rank: Super Contributor
timestamp: August 09, 2022, 12:12:11 am
content: It is an obvios scam. Helium started as a real startup, but it did not go well for many reasons. This is where build your own gateway comes from - they wanted more coverage. But that still did not help and it was time for the company to fail.Thankfully at about the same time crypto hype happened, so they pivoted and jumped on it. The offer looked attractive because they just decided to give away money. This increased coverage, but still did nothing for the users.All that time LTE was a much more viable option. More expensive and much more power hungry, but with actual useful coverage. There is no point in having low power if you can't send any data outside of major cities.And with NB-IoT getting more popular, there is no place for Helium network.
#589 – Mute Button Discipline - Page 1
Forum section: electronics / general

author: betocool
author_rank: Regular Contributor
timestamp: May 16, 2022, 11:38:23 am
content: Hey Dave Jones @EEVBlog,I worked for some time doing repairs for Zeiss Ophthalmological equipment, can't remember most of which you mentioned, but I do remember the Humphrey Fields Matrix, it runs on some sort of Linux OS (Ubuntu 12 or so if I recall correctly). Did you get the USB or the CD version? The're still around, they're used to measure your peripheral vision.Some of the most advanced equipment were the back-or-your-eye scanners, working with an interferometer and stepper motors and mirrors to direct the beam. That was a full blown PC with some serious machinery in there.Just be careful when you look at them, sometimes they can flash a fair bit. They should be safe if they're ok though.... after all they are for looking into someones eye... but you don't know when they were calibrated last.What was the other equipment again?Cheers,Alberto
How about getting Rod Elliot on The Amp Hour? - Page 1
Forum section: electronics / general

author: betocool
author_rank: Regular Contributor
timestamp: April 30, 2022, 12:14:59 pm
content: I know, I know,there is a list somewhere in the Amp Hour Website with requests but I seriously doubt someone's looking at it.When can you interview Rod Elliot of ESP on the Amp Hour? He's all about serious audio design and no audiowankery...My 2c's, hope there is progress.Cheers,Alberto
#586 – Fran Blanche Version 3 - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: April 18, 2022, 04:30:13 pm
content: #586 – Fran Blanche Version 3https://theamphour.com/586-fran-blanche-version-3/Video here...Audio herehttps://traffic.libsyn.com/theamphour/586-Fran.mp3

author: SeanB
author_rank: Super Contributor
timestamp: April 18, 2022, 04:39:18 pm
content: Thought I would put up some pictures of the controller I made, to replace Heath Robinson design, that came with the original duplicators I ran. Used what was spare lying around, all old PC parts that were unable to run Windows 95 on the upgrade to it. All new computers, I had a really busy 2 weeks work.Old 386SX machine, a whole 1M of RAM, mostly because I had plenty of it, and old mono EGA cards, with parallel port and FDC controller on separate cards. Ran MSDOS6.22, and with a quick and dirty bit oo GWBasic, running to bit bang the parallel port to operate the 2 remote control cards in the rest of the machine. worked really well, and after about 6 iterations of the software it was working quite well, able to run the duplication system well.