Dave fixes a rather strange fault in his Tandy 102 portable computer. Forum: https://www.eevblog.com/forum/blog/eevblog-1376-tandy-102-vintage-computer-repair/ Podcast: Download
Read More »EEVblog #1375 – Mailbag
Another bumper Mailbag! Forum: https://www.eevblog.com/forum/blog/eevblog-1375-mailbag/ SPOILERS: 00:00 – Start 00:17 – Dave hates cats 02:29 – BIG stud power diodes and SCR’s 06:20 – Workbench of the week. Louis Borsu from Brussels, Belgium 08:20 – Amiga Addict magazine: https://www.amiga-addict.com/ 11:35 – Dave levels up in the IEEE 13:09 – Canadian …
Read More »EEVblog #1374 – DIY Trezor Crypto Hardware Wallet – Part 1
How easy is it to take the open source Trezor Model T crypto hardware wallet files and manufacture your own? Or to modify or improve the design? The Trezor is open source hardware, so Dave checks out the Github and looks at the hardware files available and imports into Eagle …
Read More »EEVblog #1373 – DIY PCB Photograhy LED Light Box – Part 2
Part 2 of the DIY PCB LED light photography box. This time experimenting with top and bottom side emitters and paper reflectors to give an even better result. Forum: https://www.eevblog.com/forum/blog/eevblog-1372-diy-pcb-photography-light-box/ Podcast: Download
Read More »EEVblog #1372 – DIY PCB Photography Light Box
How to build your own DIY light box for photographing PCB’s Dave experiments with a cardboard box, some alfoil, and a hacked YujiLED high cri studio light. https://www.flickr.com/photos/eevblog/albums Forum: https://www.eevblog.com/forum/blog/eevblog-1372-diy-pcb-photography-light-box/ Podcast: Download
Read More »EEVblog #1371 – A 10,000hr Battery Life Bench Multimeter?
Dave is a tad obsessed with making a 10,000hr battery life bench multimeter. It’s actually not hard. Forum: https://www.eevblog.com/forum/testgear/10000hr-battery-life-bench-multimeter/ Podcast: Download
Read More »EEVblog #1370 – Kindle Paperwhite REPAIR
Dave repairs his pesky Kindle Paperwhite with touch screen and charging issues. Forum: https://www.eevblog.com/forum/blog/eevblog-1370-kindle-paperwhite-repair/ Podcast: Download
Read More »EEVblog #1369 – Xiaomi Mi Air Wireless Charging BUSTED!
Dave debunks the Xiaomi Mi Air wireless charging system that claims to be able to charge at 5W up to several meters using mm wave RF beam steering technology. Where have we heard this before? The Amp Hour 5G episode: https://theamphour.com/430-shahriar-discusses-5g/ https://blog.mi.com/en/2021/01/29/forget-about-cables-and-charging-stands-with-revolutionary-mi-air-charge-technology/ Forum: https://www.eevblog.com/forum/blog/eevblog-1369-xiaomi-mi-air-wireless-charging-busted!/ Podcast: Download
Read More »EEVblog #1368 – Active Oscilloscope Probes COMPARED (Part 2)
Part 2, this time looking at different types of active oscillocope probes. Single ended active FET probes, differential active FET probes, current clamp probes, high voltage differential probes, positional current probes, and EMC magnetic and electric field probes. 2MHz Current clamp probe: https://www.eevblog.com/product/cp2100b/ Active FET probe: https://amzn.to/3oq0Q8g EMC probe set: …
Read More »EEVblog #1367 – 5 Types of Oscilloscope Passive Probes COMPARED
Dave looks at the pros and cons of 5 different types of oscilloscope passive probes. Switchable x1/x10, Fixed x10, High voltage single ended, DIY Transmission line Z0 probe, and BNC to banana/croc leads. PART 1 of 2 200MHz 100M 100:1 HV probe: https://amzn.to/3onPj9w Cheap 100:1 HV probe: https://amzn.to/36fN0iM 8kV HV …
Read More »EEVblog #1366 – Mystery Bunker Item Teardown
Another mystery item from the storage bunker. Forum: https://www.eevblog.com/forum/blog/eevblog-1366-mystery-bunker-item-teardown/
Read More »EEVblog #1365 – Viewer PCB & Circuit Design Review
Dave answers a viewer technical question about why his circuit is acting up, and goes through a design review outlining the possible problems. Level translation, clocking, schmitt triggers, line driving, loading, buffering, bypassing, and other aspects are discussed. If you want to see more design reviews like this please drop …
Read More »EEVblog #1364 – Compaq Portable PSU REPAIR
Dave repairs the Compaq Portable Plus power supply. And takes a look at the schematic and an unusual old documentation system. Forum: https://www.eevblog.com/forum/blog/eevblog-1364-compaq-portable-psu-repair/ Podcast: Download
Read More »EEVblog #1363 – Solar FREAKIN’ Roadways Gets NEW FUNDING!
Solar FREAKIN’ Roadways has just raised over $1M by selling common stock in the company! AND has scored ANOTHER government contract!, this time from the Department of Defence! Solar FREAKIN’ Aircraft Carriers! https://www.startengine.com/solar-roadways Energy Output: https://monitoringpublic.solaredge.com/solaredge-web/p/kiosk?guid=1e085701-ccb3-4ce5-b107-86e3b5e831dd&locale=en_US Forum: https://www.eevblog.com/forum/blog/eevblog-1363-solar-freakin-roadways-gets-new-funding!/ Podcast: Download
Read More »EEVblog #1362 – A Very Skookum Mailbag
First Mailbag of 2021 is a skookum bumper! Forum: https://www.eevblog.com/forum/blog/eevblog-1362-a-very-skookum-mailbag/ Spoilers: 00:00 – AvE’s 5lb Copper Widlarizer! https://www.youtube.com/user/arduinoversusevil Making of the hammer: https://www.youtube.com/watch?v=lutiVGV5Omg Final packing of hammer: https://www.youtube.com/watch?v=Exs4kQre62I 05:05 – Avionics Guest Lab from Gary Bertram 10:01 – Koki’o Project Cases: https://www.crowdsupply.com/cowfish-studios/kokio-project-case 12:50 – 1960’s Chinese Analog VOM! + modern …
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