DHT11 Sensor Primer
In this guide we will learn how to play with a cheap ‘n’ cheerful temperature and humidity sensor DHT11 – the minuscule 4-pin sensor accurate enough for most do it yourself projects need to read […]
Attiny85 Programming Adapter for Arduino
Using an Attiny85 microcontroller is an attractive and economical way to build a minuscule Arduino project backed by a few lines of code. Very often such a project will demand an external adapter to program […]
BJT Switch & Microcontroller
Recently I got an unusual query from a newbie microcontroller hobbyist on how to drive an electromagnetic relay using a bipolar junction transistor (BJT). Admit it, analog electronics is not a piece of butter cake […]
Ultrasonic Water Level Monitor
Here’s a little idea to monitor the level of water in a water tank with the help of an ultrasonic sensor module. The build process is very simple, and best understood by referring to the […]
Simple Selfie Light
Let me introduce another minimalistic circuit of a simple Selfie light based on generally available low-cost components. The idea presented here is a compact USB chargeable design with inbuilt rechargeable battery and dedicated battery charger […]
Solar LED Road Stud
Let me start this month with a Solar LED Road Stud project. Solar LED road stud is a self-powered, autonomous device usually installed on the center line of a road, the lane boundary, and crosswalks […]
Hack Your 16×2 LCD
Nowadays most popular microcontrollers are working on 3.3V but many liquid crystal displays (LCDs) for them are usually on 5V, because they are centered on Hitachi’s de facto standard LCD controller – the HD44780 chip. […]
Mini Solar Garden/Street Light
Here’s another do it yourself project of an automatic mini solar garden/street light. This design belongs to the ‘renewable energy’ category, and is wired around a handful of inexpensive electronic parts. This nifty light circuit […]
Active Heat sink Fan Controller
Active heat sink fan controller presented here is a very simple yet highly useful circuit for automatic control of cooling fans in active heat sink units. The circuit is realized using easy-to-use inexpensive parts and […]
Stand-alone PWM Power Driver
Do you remember the feeling of building your own power electronics projects with a nifty analog chip? Something like DC-AC power inverter based on the SG3525? The SG3525A is a pulse width modulator integrated circuit […]