In this post we learn how to make a simple yet efficient transistor/diode tester circuit, that will not only test the quality of a BJT, but will also help to […]
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IC 555 Astable Calculator
This IC 555 software calculates the values of the resistors and capacitors for a NE555 timer chip, which is designed as a astable multivibrator (oscillator), or square wave generator. You […]
How to Make a RFID based Attendance System
In this post we are going to construct a RFID based attendance system, which can record attendance of 12 students / staffs for a given time window and this system […]
Arduino Automatic School/College Bell System
In this post we are going to construct an automatic school bell/college bell system using Arduino, 16 x 2 display and real time clock module. You can program this project […]
Build this Mosquito Bat without Battery
This simple homemade mosquito swatter bat neither requires a circuit nor a battery for the operation. The entire design works using a single high voltage capacitor and through quick charging […]
Patient Drip Empty Warning Indicator Circuit
In this post we will learn about a simple mechanism, and a circuit which will enable a patient’s IV drip bottle system to sound an alarm whenever it gets almost […]