Mod Your Goodknight Gold Flash
I’m sure there’re a lot of electronic gadgets in your house that can be recycled. The good news is most of them can be used again or for another purpose. So, don’t just throw those […]
Arduino Traffic Lights (v2) – Crosswalk Button
I finally got around to testing this concept – adding a crosswalk button to the previously published Arduino Traffic Lights project I must admit, I was surprised to find a compact traffic light controller module […]
Arduino Analog Sensor – Read & Display
Arduino provides a number of analog inputs which enables us to measure parameters such as voltage, current, resistance, light, temperature, and so on in the analog arena. In this post, we’ll look at how to […]
20mm LDR & Raspberry Pi Pico – Quick Guide
In this tutorial, we will learn how to interface a big photoresistor with Raspberry Pi Pico. Since the Raspberry Pi Pico microcontroller provides analog ports, we can easily do a number of projects using common […]
Laser Monkey Scarer v1
There has been a drastic and steep increase in the number of monkeys coming into my backyard over the last few months. Below you can see a shot taken by my surveillance camera. So, naturally […]
RCWL-0516 Doppler Radar Motion Sensor Module – Revised Primer
This is a quick revision of the cheap and popular motion sensor radar module RCWL-0516 (https://www.codrey.com/electronic-circuits/microwave-radar-motion-sensor-switch/). The RCWL-0516 module would be a good choice for making motion sensing lamps and other devices, and it probably […]
Pro Mini Beacon Light
This is an updated version of an old project that was published in EFY Magazine (print) 21 years ago! Now you can see that article here https://www.electronicsforu.com/electronics-projects/solidstate-signal-lamp This time I’m using a minuscule microcontroller to […]
Raspberry Pi Pico & Sweeping Servo
A servo motor is a compact motor whose shaft turns to position something based on a control signal. The common servo motor consists of plastic housing that contains a small motor, control circuitry, and a […]
Arduino Touch Sensor/Capacitive Proximity Sensor
A capacitive proximity sensor is a non-contact device that can detect the presence or absence of an object in its close vicinity. It utilizes the electrical property of capacitance and the change of capacitance based […]
Arduino Optical/Light Theremin – Make it Yourself!
The theremin is an electronic musical instrument with two metal rods (antennas) used to control pitch and amplitude by the human operator using hand gestures. The left rod (a horizontal hoop) reduces the amplitude as […]