In an IC 4047 astable oscillator circuit, the output of the IC continuously generates a switching ON/OFF signal. Since the output is never in a stable state and constantly switches between and low and high, it is called an astable multivibrator. The astable ON/OFF switching frequency is adjustable and can be varied by changing the […]
Newly Updated Circuit Projects:
SMS Based Water Supply Alert System
In this post I will show how to construct a circuit which will notify the user via SMS if the water supply to you area / home is initiated. It can show the time when the water is begin to supply and ended, average water flow speed in liter per minute and total water delivered […]
How to Make a RFID based Attendance System
In this post I will show how to construct a RFID based attendance system, which can record attendance of 12 students / staffs for a given time window and this system can record up to 255 attendances per person. What is RFID Attendance System We don’t need any introduction regarding the RFID based attendance system, […]
Digital Weighing Scale Using Load Cell and Arduino
In this post I have explained about strain gauge based load cell. We will be exploring what Strain Gauge is, what Load Cell is, temperature effect on strain gauge, temperature compensation with Wheatstone bridge and Load cell amplifier HX711, and finally I have explained how to build an Arduino based weighing scale machine by implementing […]
Buck Converter Circuit Using Arduino
In this project we are going to step down 12 V DC to any DC value between 2 and 11 V. The circuit which steps down the DC voltage is known as buck converter. The output voltage or step down voltage needed is controlled using a potentiometer connected to Arduino. By Ankit Negi INTRODUCTION TO […]
CDI Tester Circuit for Automobiles
The first design below shows a simple workbench setup for testing all types CDI circuits. It uses a capacitive discharge ignition circuit along with a CDI coil to implement the testing procedure. Audio/Video Representation The circuit does not require any separate oscillator, rather the 100Hz from the bridge rectifier itself works like a pulsed trigger […]