EEssential

ESP32-PICO-D4 is a SIP (System-In-Package) module; it is measured about 7 x 7 x 1 mm and looks like a regular IC chip in a 40-pin QFN packa...

Expressif comes out with ESP32, a more powerful successor to the popular ESP8266 .  The ESP-WROOM-32 module can be purchased for under $5.  ...

Some pictures of LCD pixel structures. 1.8" TFT LCD 128 x 160 Samsung TV 32" 1920 x 1080 Sony 4K TV 49" ...

An 1.8" 128 x 160 TFT LCD can be purchased for around $3.  The one that I got has the marking of "KMR-1.8 SPI".  It claims to...

I've built a number of LED lights myself.  But you can purchase a 1000LM Cree Q5 LED flashlight for less than $2.  What I found intrigui...

When I installed Armbian on the OPiP half a year ago, the builtin wifi was not supported.  I tried again with the later build, Armbian_5.3...

I'll detail some of the failures of electrical products that I encountered. Bluetooth Earphone I have a Bluetooth earphone that I ha...