Photoelectric Light Sensor
It’s rather ridiculous to think how cheap you can get light sensor modules today. Sure, you’ll get those by online for a couple of coins! Most Chinese light sensor modules have a photo resistor or […]
Triac AC Dimmer/Speed Regulator – Random Thoughts
I made a little purchase in the midway of December, and there’s a nice packet waiting for me when I got home from Xmas holidays – A couple of AC230V/2000W light dimmer/speed regulator modules! The […]
RPM & Infrared Tach – Rough Realities!
Governing the speed of a motor is very important in many situations especially in mechatronics. By measuring the speed of a motor, we can then adjust the motor’s speed to exactly what we want. Along […]
Mini Pocket Weight Scale Hack
I’ve a few mini pocket weight scales. What I love about the cheap device is that it uses a pretty little load cell. When a scale get worn out, perhaps you can reuse its 4-wire […]
How To Use MQ-135 Gas Sensor
A Gas sensor serves to detect and measure the concentration of gas in the environment. Nowadays you can find many different types of easy to use gas sensors, especially in MQ series. In this article, […]
A Junk box 555 PWM Generator
Often you’ll need a simple pulse width modulation generator circuit to test or run small dc lamps and motors in your electronics projects. There’re ways of creating cheap and practical circuits at home, and today […]
Simple Flame Supervisor
Simple flame supervisor is nothing but a little flame status monitor. The theme of this play is to build a cheap device to provide an alert when the flame under supervision runs out unexpectedly. Admittedly […]
SS49E Hall-Effect Sensor & A Random Hack
Very recently I wanted a couple of Hall-Effect Switches again for some random experiments, hence placed an order for a bunch of A3144 Hall-Effect Switch ICs. The online retailer quickly delivered the packet at my […]
Arduino Morse Code Practice Oscillator
Morse code almost not need an explanation! Anyway simply note that it’s a telegraph code in which letters and numbers are represented by strings of dots and dashes (short and long signals). Learning and practicing […]
Little 1 Key DC Touch Dimmer
If you’re an active electronics hobbyist or maker, sometimes you may get a request from your close friend or neighbor to build a very economical table lamp or bedroom lamp for him/her but with some […]