Toy Car Signal Light & Siren
This post showcases an example project I made to help you add a terrific signal light and siren to almost all toy cars. As we all know, cheap remote control (radio control) toy cars (R/C […]
MAX30100 Pulse Oximeter & Heart Rate Sensor Module – Quick Refresher
The moment you get a MAX30100 pulse oximeter and heartrate sensor breakout board, you can move on to the process of making your own perfect pulse oximeter. But is making one as easy as you […]
Pool LED Lamps & Idea Sparks
Recently while searching for little floating toys, I came across some inexpensive Chinese LED pool lamps. Most sellers described them as water-activated lotus/lily LED flower lamps. Out of curiosity, I purchased a few of them […]
Raspberry Pi Pico & Little Light Stick (v1)
A couple of months after its release, ultimately, I got a hand on the Raspberry Pi Pico, and posted a few hobby projects here. The RPi Pico is a microcontroller board centered on the RP2040 which’s […]
Little Light Sensor Switch OPT101
Some time ago my neighbor asked me to design a better light sensor module. In fact, he already has a few small light sensor modules to automatically control the lights in his barn. Those cheap […]
Solar LED Lantern Torch – Quick Teardown
Have you ever wondered what’s inside this cheap Chinese Solar LED Lantern Torch? Although it appears like a safe and beautiful emergency lamp, be aware that it has the potential to kill you through its […]
Wet Floor Warning LED Sign
It’s human nature to let our guard down temporarily and be distracted by random thoughts or doing multiple activities. A momentary lapse of attention that ends in a slip can led to a variety of […]
Raspberry Pi Pico – Light & Sound Maker!
This title is a bit exaggerated, I agree, but the following writeup is actually about controlling LEDs and Buzzers using Raspberry Pi Pico. At first, this may seem like a simple topic, but here you […]
Quick OLED Thermometer v1
After getting my new soldering iron tip thermometer, I got inspired by that idea and decided to design a quick digital thermometer for general use. By the way, the soldering iron tip thermometer is an […]
Funny TV Faker (v1)
The Funny TV Faker project presented here is in fact a portable TV Light Simulator. A commercial television light simulator device has a bunch of flashing and flickering lamps to simulate the light of a […]