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 A request from a fellow ham made me revisit an old project, and Arduino based repeater controller. This lead to an iterative process to up...

Playing with Arduino and it's C++ I often use timed tasks. Basically, in Arduino you can do things at specific interval either by adding...

I have a lot of those little boards made around a TP4056 IC. According to the datasheet: The TP4056 is a complete constant-current/constant-...

I have an old Proxxon tool and, like many old power tools, the built-in speed controller is not working anymore. So, I was thinking to do a ...

ATTENTION!!! This was made and tested on my Xiegu G90 and it is working very smooth and nice. However, your mileage can vary from similar ex...

Sometimes in the lab there is need to monitor the power parameters during some period of time and put it on a nice graph. Because I couldn...

 There is a time when an Arduino is too big and has useless features. An ATMEGA328p on a breadboard, using internal clock at 8 MHz with a co...

A few years ago I came around a nice POS Vacuum Fluorescent Display. The model I have is CD7220 and it is designed to show information abou...

I decided that I have to make another K3NG keyer, this time full featured in order to test some things.  Therefore, I started to make it ...

After a long time I decided to came back to CW. Just for fun and to use the Pandemia holiday I thought will be interesting to have a lit...

For some time I wanted to put LED DRL (Day Running Lights) on my car. It was some pain in the a*** to run the wires into the car and I was ...

1. Install Sonoff-Tasmota firmware following the instructions here . 2. Default relay output on NodeMCU is GPIO 12 on ESP8266 (D6) on LoLin...

I was playing with a Adafruit Huzzah ESP8266 breakout board and somehow I screw it, leaving it into an undefined "load programm" ...