€ 15,00 Adafruit Feather HUZZAH with ESP8266 € 19,00 Adafruit ADXL345 - Triple-Axis Accelerometer (+-2g/4g/8g/16g) € 10,00 2500mAh Li-Po rechargeable battery with JST-connector € 4,00 Half-size ...

If you do not know about LED and ultrasonic sensor (pinout, how it works, how to program ..), learn about them in the following tutorials: -Arduino-LED tutorial ...

LEDs are a wonderful technology. You put in a little bit of power, and you get out a wonderful amount of light. They’re efficient, cheap, and plentiful. We use them for so much! What you might not ...