Portable electronics toolkit

When I’m working on site I generally carry a small electronics toolkit with me. This is my current kit. I’m mostly using Hozan and Hakko tools. While these are really great tools, they are a little expensive (about 20USD for the sidecutters). I’d like to put a bunch of these kits together using cheaper alternate …

Ultra-cheap Chinese Microcontrollers

I’m heading to Shenzhen and one of the things I want to take a look at is the ultra-cheap MCUs that are available in the Chinese ecosystem. Ultimately I’d like to see what the cheapest part available is, and how much a reel would cost. This post documents the parts I’ve seen on taobao. I …

Some simple Arduino code to read from a keypad

Wired up a cheap keypad to an Arduino. These keypads were a few cents each on ebay and look suitable for a project I’m working on. This is the same keypad as used here and their code is worth referring to. The following reads presses from the keypad and prints them over serial. It only …