Electronics

Avoid DHT-11 sensors

Bruce Ediger

A few years ago, I realized I had a shoe box with several Raspberry Pi single-board computers just sitting around.

I came across an article saying that interfacing something called a “DHT-11” is a rite of passage for Raspberry Pi users.

2 Transistor LED Flasher

2 Transistor LED Flasher

Bruce Ediger

In an attempt to gain some electronics knowledge, I bought $30 worth of components and breadboards from Amazon, and built a 2-transistor LED flasher.

Wireless Charging Detector

Bruce Ediger

I dropped my cell phone and cracked the screen, so I got a Google Pixel 6 and a wireless charging stand. I ended up looking up the “Qi” standard for these chargers. It seemed like the coils used to transfer energy weren’t particularly exotic in size, shape, material or manufacture, so I decided to try to receive some energy from the charging stand.

I’ve since revised this contraption.