My friend Fatima of Little Egret Studio was interested to monitor the temperature of her pottery kiln, a SKUTT KM822. We came up with a system that uses the kiln’s built-in K-type thermocouple, and the Blynk app on any phone/tablet to
A good project to get the kids up in the morning: play a random song of their favourites list. This Arduino based alarm clock uses an MP3 shield with SD card, an OLED display, and a Real Time Clock module
Kids love calculators so i made an Arduino based calculator with a generic 4×4 keypad that uses 8 digital pins. It comes with a sticker, so it was easy to attach it to a plywood laser cut box. The only
The DP30V5A is a cheap digital power supply with constant voltage and constant current features, so i was inspired by this video to build my own bench power supply. The only thing i had to hack to put it into a
Combining various sources of code, i built a cheap web camera that sends an updated image to a web server every 2 minutes. It is based on the ESP8266 wifi module, programmed with the Arduino IDE, and a serial camera (TTL level)
My son was super excited with his junior foosball from Shenzhen. It was easy enough to assemble, and worked well except for the plastic scoreboard. An excellent opportunity for an electronics project! Actually the electronics are fairly simple: an Arduino Nano an
This box shows the time (NTP sync) and a few data feeds of my home monitoring system. It uses a 32×16 LED matrix driven by an Arduino Nano, and ESP8266 Wifi module (NodeMCU v1). I put it in a laser
The polargraph is a fascinating vertical plotter, that uses two small motors and gravity to move a pen over a paper, controlled by software on a computer. Actually ‘polargraph’ is the name given to it by a guy who wrote an
This is an Arduino-based battery powered air quality monitor using the optical SHARP GP2Y1010AU0F dust sensor (or its more recent version the GP2Y1014). It reports values in micrograms per cubic meter, which is also the unit of PM2.5 and PM10. Having
My 8-yo daughter asked if we could put an electronic lock on her treasure box. I suggested we use her Octopus card (Hong Kong public transport smart card) to open and close the box. I had experimented a while ago