The key purpose of a panic alarm (also called duress alarms, hold-up alarms, or panic buttons) is...
Recently Published
BJT & Diode Temperature Sensors – A Quick Walk
When it comes to everyday temperature sensing, the thermistor is the most simple and inexpensive...
Locker Security Switch
Want an inexpensive locker security switch? Look no further – build this little but versatile project. All components for this...
Poor man’s RC Battle Switch/RC Relay
This is quite a fun little project that can easily help you to build a battle switch for your radio-controlled (RC) model...
Residential Electronic Pest Deterrent
There’re many residential electronic pest deterrent circuits on the web, and with some research, you will be able to build...
Audio Induction Loop Receiver (Quirky Ideas)
Little version of the audio induction loop receiver presented here can serve a variety of purposes. It is extremely useful for...
Arduino pulseIn() Primer
A while ago someone asked me via email how to read a pulse input on an Arduino I/O pin. So, I decided to write a short note about...
Arduino Larson Scanner
This is the simple way to play with a Larson Scanner. Just buy a Larson Scanner kit like the one shown above and start up the...
Embedded Systems
Different Types of Sensors – Analog and Digital
Sensors have become an integral part of the embedded system. Right from your mobile to security systems installed at home. They...
UART Communication Protocol – How it works?
UART (Universal Asynchronous Transmitter Receiver), this is the most common protocol used for full-duplex serial communication...
7 Best Books to learn Embedded Systems that excels your Career
Getting knew about embedded systems is toilsome for an engineering graduate and a fresher who has just passed out. To learn the...
What is RS232 Protocol and How it Works?
Historically, RS232 Communication protocol is an old serial communication protocol developed by EIA (Electronics Industry...
Electronic Circuits
Solar LED Book Light
Poor man’s Lost Model Alarm (LMA)
Poor man’s Dog Silencer/Whistle
Spark Transmitter & Receiver (another dirty diy...
A Mighty LED Flasher
Aquarium Cooler Fan
Nap Zapper Alarm? Don’t Buy! Do It Yourself!!
Musical Doorbell
Automatic Fragrance Dispenser
