This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...

Posted in Arduino Hacks Tagged arduino, capacitance, proximity sensor ← Split A USB-C PD Port Into Three Port-ions SIMD-Accelerated Computer Vision On The ESP32-S3 → ...

Posted in Arduino Hacks Tagged adafruit wave shield, arduino, ultrasonic, ultrasonic distance sensor, wav shield ← Fabricate Your Own 7-Segment Displays Easy Capacitive Touch Sensors In Eagle → ...

I've just come across a no-name non-contact, high-precision 80 GHz mmWave radar sensor for liquid level detection with a 40m ...

Those sensors include a Waveform flame sensor module, a DHT11 temperature & humidity sensor, and an IR receiver. You can see the prototype in use below, picking up the flame from a regular lighter.

After some searching, I ended up using a microcontroller and a piece of code borrowed from the web that I tweaked and adapted. The microcontroller-based concept was chosen because I wanted to scale ...