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

Kids love robots. And parents seem to like the idea that their kids are learning about robotics. So i came up with the BuffaloBot for my students: a 2WD Arduino robot with geared motors on a laser cut design of

For my kids workshops i always try to come up with new Arduino games, and they really liked the recent Gyro game.  I decided to make a laser cut box for it, and add a second game, Pong for 2

I have been building several sound boxes lately (amps, sequencers), and when i thought of making an internet radio, i found the excellent Esp-radio project using the Arduino IDE to program the ESP8266 WiFi module (ESP-12E version). The documentation is

I made an Arduino game around the MPU-6050 sensor (6DOF = gyro+accelerometer) and an OLED display: tilt the sensor to move the ball around do not touch the borders try to catch as many squares as possible within 1 minute I’m