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“Introducing an accurate AC energy meter that is Wi-Fi enabled. The meter has a power range of 5W to 3.2kW and measures True RMS volts, True RMS current, Real power, Power factor, kilowatt-hours and includes a scrolling plot of …
“An advanced lithium battery charger and powerbank with a SSD1306 OLED display, charges 18650, 20700 and 21700 batteries. Story I wanted to make a battery charger that was not based on the popular Chinese TP4056 IC that you see all …
“So here’s something special, A Mini R2D2 PCB that speaks Astromech. Astromech is a fictional language in the star wars franchise consisting of whistles and beeps. This Mini R2D2 that I made is a Keychain. Its brain is an …
“An Arduino UNO Compatible Board with isolated Glowing headers and some Extras If its not broken don’t fix it, just add some more features. The Uno Plus+ is An Arduino Uno Compatible Board with a twist. All the components …
“Why $3 Macropad? I have always been a great fans of Maker Faires around Asia and I am thinking if I could make something special so during maker events, I can exchange gifts with the makers I like so as …
“LED Dot Matrix modules are an excellent way to display information in a compact and visually appealing way. These modules consist of a matrix of LEDs arranged in a grid pattern, which can be used to display graphics, text, and …
“A seven segment LED clock that connects to the internet to automatically set the time and sync on the hour every hour. I made some internet connected 8 digit 7 segment LED displays using a NodeMCU and Harris semiconductor ICM7228A …
“18650 LiPo cells are almost everywhere these days. Keeping them properly charged and maintained can be quite a pain. My attempt to fix this. Due to their high capacity and relatively low cost, LiPo cells are almost everywhere these days …
“Zen and the pursuit of CW operation with SDR Console. After a few on-air queries, I decided to write this article which documents how I operate CW using my SDR based QO-100 groundstation. The circuit I designed incorporates the …
“A Stereo I2S shield for use with my ESP32-S dev board, or any other I2S-capable MCU if you are so inclined… some hacking required though. Sound or music adds another level of complexity to any project. Having the …