EEVblog

Repairing a customers Brymen BM786 multimeter, and investigating the cause of the InEr error message on the input jack alert feature. Plus a giveaway to a local youngster. 00:00 – A returned BM786 Multimeter with InEr error message 03:23 – Split jacks and input alert circuit 05:19 – In-Circuit probing TIP and Low Ohms mode. …

This was going to be a repair of a vintage Tandy 200 Portable Computer… Forum: https://www.eevblog.com/forum/blog/eevblog-1662-vintage-tandy-200-portable-computer-claytons-repairteardown/ 00:00 – I sear this Tandy 200 had a problem… 02:54 – Teardown 03:57 – The new BM2257 Multimeter 05:25 – I think it’s the buzzer 08:06 – Microscope teardown 16:20 – They don’t m

The difference between Time Domain and Frequency Domain in AC circuit analysis. AC Theory Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- Forum: https://www.eevblog.com/forum/blog/eevblog-1661-ac-basics-tutorial-part-5-time-domain-vs-frequency-domain/

Part 4 in the AC basics tutorial series. AC applied to resistors, capacitors and inductors, along with Capacitive Reactance and Inductive reactance. AC Theory Playlist

Review of the new Quick 861 Pro hot air station compared to the original 861DW. Forum: https://www.eevblog.com/forum/blog/eevblog-1659-quick-861-pro-hot-air-station-review/

It’s important to understand the difference between Mean and Median, not just for engineering, but for everyday life, so you don’t get manipulated by people with bad intentions. UBS Global Wealth Report: https://www.ubs.com/content/dam/assets/wm/global/insights/doc/global-wealth-report.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1658-tutorial-mean-vs-median/

Almost 30 minutes of tearing down a Samsung 75″ QLED One Connect dumpster TV and trying to power it up to see if it’s busted or not. QA75Q7FNA 00:00 Dumpster Samsung QLED 75″ 04:46 – Teardown wasn’t easy as expected… 08:11 – What is this cable retention BS? 11:26 – I’m still at it… 14:22 …

More Mailbag! 00:00 – DPS Ultrathin DIN 5V PSU’s https://digitalpowersystems.eu/de/standard-produkte/ 01:15 – The Knife 06:16 – USB-C Isolator https://digitalpowersystems.eu/de/schnelle-und-sichere-usb-zu-uart-kommunikation-dank-digitaler-isolierung-und-esd-schutz-fur-ein-und-ausgange/ 07:34 – Zubax FluxGrip FG40 Electropermanent Magnet for Drones https://zubax.com/produc

You can use almost any decent modern multimeter to safely discharge high voltage capacitor banks WITHOUT a LowZ function. Forum: https://www.eevblog.com/forum/blog/eevblog-1655-multimeter-tip-discharge-capacitors-using-any-meter/ Transistor Zener Clamp video: https://www.youtube.com/watch?v=BGcKjy_UNQ4

A full 3 hour discussion with the legendary Lee Felsenstein, designer of the Osborne 1, SOL computer, VDM-1, Pennywhistle modem, and the inventor of social media. Covering everything from the Berkeley free speech movement, the counterculture movement, his career, through to Obsorne and how he invented social media with Community Memory. His book: https://www.amazon.com/Me-My-Big-Id