Sunday, October 18, 2020

TL-21 Kelvin clip test lead upgrade for DER EE E-5000 LCR meter

There's no shortage of blog posts and videos describing TL-21 probe upgrade for the extremely popular DER EE E-5000 LCR meter. With that said, this post will is somewhat repetitive, but hey, I already took the pictures, so why not share.

For impatient readers, this is what the finished job looks like:

Tuesday, October 6, 2020

Measuring NiMH vs Li-Ion voltage sag at small loads with ESP32

This article is a brief excerpt from my experience with using Nickel Metal Hydride (NiMH) and Lithium-ion (Li-ion) cells for powering home sensors running the ESP32 Wi-Fi microcontroller.

Measuring breadboard wiring resistance: how bad is bad?

This article is a brief record of my early breadboard wiring adventures, because learning things the hard way is fun! You may also read the related post if you wish: