# Call In Show #4

- Show: [The Amp Hour](https://hardwarepodcasts.com/podcast/the-amp-hour)
- Published: 2016-04-01
- Length: 1h 09m
- Episode: 293
- Page: https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4
- Listen: https://theamphour.com/293-call-in-show-4/

## Summary

Hosts Dave Jones and Chris Gammell take calls from Trevor Sutherland, Todd, Sam, Arsenio, Chris Kessler, and William regarding power grid generators, surface wave transmission, multimeter troubleshooting, and product development advice. They diagnose SCR latch-up in a power sequencing circuit for Chris Kessler and discuss the challenges of measuring microamp currents for William's USB tester. The episode concludes with updates on Dave's EEVblog multimeter crowdfunding and upcoming travel plans.

## Chapters

- [0:00](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4#t=0) Introduction and Travel Updates
- [4:37](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4#t=277) Power Grid Generators and Reactive Voltage
- [15:55](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4#t=955) Surface Wave Transmission and Single-Wire Power
- [28:21](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4#t=1701) Multimeter Troubleshooting and Kickstarter Advice
- [38:21](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4#t=2301) SCR Latch-up and Power Sequencing Diagnosis
- [55:22](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4#t=3322) USB Tester Design and Microamp Measurement Challenges
- [1:06:32](https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4#t=3992) EEVblog Multimeter Updates and Closing

## Topics

- [Analog & power electronics](https://hardwarepodcasts.com/topic/analog-and-power-electronics)
- [PCB design & layout](https://hardwarepodcasts.com/topic/pcb-design)
- [Validation & product-market fit](https://hardwarepodcasts.com/topic/validation-and-product-market-fit)
- [Test & measurement](https://hardwarepodcasts.com/topic/test-and-measurement)
- [Crowdfunding & preorders](https://hardwarepodcasts.com/topic/crowdfunding)

## Most relevant to

early-stage companies, makers and hobbyists

## Mentioned

- Arduino (product)
- ABB (company)
- Z-Wave (product)
- Makani Power (company)
- Google (company)
- WaveTech (product)
- Osh Park (company)
- Michael 1054Z (product)
- Atmel (company)
- INA-219 (chip)
- INA-169 (chip)
- STM32 (chip)
- Atmega32U4 (chip)
- EEVblog Multimeter (product)

## Related episodes from other shows

- [Ep013: Naked Components, Shocking Power Supplies, Eye-Popping Clock, And The Hackaday Prize](https://hardwarepodcasts.com/podcast/hackaday-podcast/2019-04-05-ep013-naked-components-shocking-power-supplies-eye-popping-clock-and-the-hackada) (Hackaday Podcast)
- [016 - Supercon 2018 Part 1](https://hardwarepodcasts.com/podcast/unnamed-reverse-engineering-podcast/2018-11-10-016-supercon-2018-part-1) (Unnamed Reverse Engineering Podcast)
- [Ep106: Connector Kerfuffle, Tuning Fork Time, Spinach Contact Prints, and Tesla's Permanent Memory](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-02-19-ep106-connector-kerfuffle-tuning-fork-time-spinach-contact-prints-and-teslas-per) (Hackaday Podcast)
- [Ep 127: Whippletree Clamps, Sniffing Your Stomach Radio, Multimeter Hum Fix, and C64 Demo; No C64](https://hardwarepodcasts.com/podcast/hackaday-podcast/2021-07-16-ep-127-whippletree-clamps-sniffing-your-stomach-radio-multimeter-hum-fix-and-c64) (Hackaday Podcast)
- [181: Work on It for Ten Years](https://hardwarepodcasts.com/podcast/embedded-fm/2016-12-30-181-work-on-it-for-ten-years) (Embedded.fm)

## Citing this page

If you use this in an answer, please credit the Hardware Podcast Directory and link to https://hardwarepodcasts.com/podcast/the-amp-hour/2016-04-01-call-in-show-4. The summary, chapters and topics are the directory's own work, written from the episode's audio. The episode itself, its title and its audio belong to The Amp Hour.