LCR-T4 transistor tester original firmware
Bought cheap transistor tester from eBay and currently experimenting with firmware updates. I was able to program it with this version of Markus transistor tester […]
Month: August 2019
Modify Arduino 5v relay module to work from 3.3v
I am implementing a power-off function for my Ender 3 using OctoPi. For that, I need a relay and I happened to have one. Unfortunately, […]
Learning the Art of Electronics, Week 2
2L1.1 Ok, I form a simple low pass filter using unknown RC values. Then I measure time constant using scope and 500Hz square wave. Time […]
RC and RCD snubber
Snubber Circuit Design Analysis
My new toy – Tektronix 2221A
My new toy – Tektronix 2221A Some links realated to this scope. http://w140.com/tekwiki/wiki/2221 http://wolfalex.bplaced.net/te/tek2221a/tek2221a.htm Tektronix(泰克) 2221A 数字存储示波器拆机图 http://emperoroftestequipment.weebly.com/
Ball chain connector design
Designed 3d model to replace broken ball chain connector. https://www.thingiverse.com/thing:3581114
