Simple 12V DC Fan Speed Controller Circuit is an useful project in electronics. It changes fan speed by adjusting the voltage. This post talks about fan speed controller using IC LM2941. LM2941 is low dropout voltage regulator and it handles up to 1A current. It is good for cooling, temperature control and automation projects. In […]
Sensors and Detectors
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. This circuit is easy to make and can be used at home, in car and in many places. It is good for security, stop theft and in feel movement. Main parts of the circuit […]
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. It finds nearby things that can block the way. It has two parts: Transmitter Circuit: which sends IR light using IR LED around the car. Receiver Circuit: which gets back the IR light if […]
Understanding Photosensitive Devices Circuits
Photosensitive device works with light. When light hits the voltage or current changes. It can turn ON or OFF lamp, alarm or control system. They are used in auto lamp, sensors and safety circuits. Photocell: Photocell has special design. Light material is placed in zigzag between two metal contacts on ceramic base. Zigzag gives is […]
Simple Short Circuit Detection and Alert System
Simple Short Circuit Detection and Alert System is very important in power system. It stop damage when short happen. Short happen when positive and negative wire get touch. This make big current flow and can break parts or burn wire. Circuit uses 2 transistor, buzzer and LED to find and show short. If there is […]
Simple Flame Sensor Circuit using Arduino
Flame sensor is very important for many uses like industry machines, safety check and fire alarm. In this post for Simple Flame Sensor Circuit using Arduino shows how to connect flame sensor to Arduino to find fire. This project is cheap and works well for real-life fire detection. Coding: Code for Flame Sensor Digital (D0) […]