EEVblog #735 – Mailbag

Another movie length Mailbag.
What have people sent in this week?

Why are cheap Ebay LED light bulbs so bad? Dave investigates why some of them are doomed to fail. DaveCAD and thermal camera time.
Datasheet for example LED

CPM700 Countersurveillance unit from Research Electronics Inc for cold war spy bug sweeping.

Cheap Ebay voltage sources for multimeter calibration

Raspberry Pi I/O Hat Kickstarter, the Hatilogico:

Industrial RS232 modem teardown
Bricked Assus TF300 Transformer Tablet
Belkin router teardown

Cypress Parachute Automatic Activation Device.
Previous video teardown on this

About EEVblog

Check Also

EEVblog #1334 – Mystery Dumpster Teardown

Mystery dumpster teardown time! With the most amazing mechanical mains power switch you’ll ever see! ...


  1. You are so cool! I don’t think I have read through a single thing like that before.So great to discover another person with some unique thoughts on this subject.Really.. thanks for starting this up. This web site is one thing that’s needed on the internet, someone with a bit of originality!

Leave a Reply

Your email address will not be published. Required fields are marked *