A simple F/V converter is a useful circuit that converts signals of different frequencies into corresponding DC voltages, and people use it in many applications, including tachometers, speedometers and industrial machines. LM331 is popular IC for this and it can do both V/F and F/V and it is very accurate and very flexible, here LM331 […]
Sensors and Detectors
Frequency to Voltage Converter Circuit using IC TC9400
Frequency to Voltage Converter Circuit using IC TC9400 is useful in signal work, motor speed control and sensor connect. It takes frequency signal and gives voltage output and this helps to read and use frequency as voltage in many ways. Also, the circuit operates from a 10–15 V DC power supply, the circuit diagram uses […]
Automatic Night Lamp Circuit using Battery Power
Automatic Night Lamp Circuit using Battery Power works on battery and saves energy, it turns ON in dark and OFF in light. Furthermore, this circuit is good for bedroom, hallway, stairs and gives light at night and it also uses two 1.5V batteries and has 7555 timer chip, LDR as light sensor and LED as […]
Simple Shock Sensor Alarm Circuit
In this Simple Shock Sensor Alarm Circuit we can feel vibration or shock, which then makes loud sound with piezo buzzer. Also, we can build this circuit easily and use it at home, in cars and in many other places, as it improves security, helps prevent theft, and detects movement. Furthermore, main parts of the […]
DIY Parking Sensor Circuit using IC 555 and IC LM324
DIY Parking Sensor Circuit using IC 555 and IC LM324 is smart device as it helps driver while parking a car, also it finds nearby things that can block the way. Circuit has two parts: Transmitter Circuit: which sends IR light using IR LED around the car. Receiver Circuit: which gets back the IR light […]
Measuring RPM with a Tachometer Circuit
A tachometer measures how fast a motor shaft or disk rotates and it displays the speed in RPM (revolutions per minute). This article for Measuring RPM with a Tachometer Circuit teaches us how simple tachometer circuit made, how it work and how to build it. Also, tachometers play an important role in industries, automobiles and […]