This article is about is a Simple Transistor Based Touch Switch Circuit. It works when finger touches the pad with no push button used. Human body gives small signal and circuit senses this signal. Two NPN transistors are used and one LED is used as output. Circuit works with only 3V supply which is very […]
Sensors and Detectors
Arduino Touch Sensor Relay Circuit
Want to control appliances by touch? then this circuit makes it possible. This Arduino Touch Sensor Relay Circuit uses Arduino and touch sensor. Arduino reads touch signal and relay works like toggle switch. Touch sensor is touched once and relay turns ON. If we touch again then relay turns OFF, each touch changes relay state. […]
Simple Infrared Fire Alarm Circuit
This is Simple Infrared Fire Alarm Circuit for beginners. It use infrared receiver sensor to detect fire heat or flame light. When fire come close sensor output changes. Then LED glow and buzzer makes sound. This circuit is cheap and easy to make. It also use only few parts like BC547 transistor, LED, buzzer, IR […]
Simple Sound Sensor Circuit with Arduino
This project show how to use sound sensor with Arduino. Sound sensor detect clap or loud voice. When sound come, Arduino turn ON LED and buzzer. This project for Simple Sound Sensor Circuit with Arduino help beginner understand sensor working. Arduino Coding: Code Explanation: Circuit Working: Parts List: Item Quantity Resistors 220Ω 1/4 watt 1 […]
Measuring Bend Angle using a Flex Sensor Circuit
Flex sensor is a small strip that changes resistance when we bend it. When straight, resistance is low. When bent, resistance becomes high. Many projects use this sensor. It is used in robots, gloves, gaming, medical tools and wearables. Sensor works simple with more bend gives more resistance. Flex Sensor Output Voltage Comparison Graph: Circuit […]
Arduino Flex Sensor Circuit
If we want Arduino to feel the movement, flex sensor is best. No click, no sound only smooth bending. It bends and Arduino gets new value every time. Perfect for beginners who want to control things by bending. Simple circuit, simple code, powerful idea. Arduino Coding: Code Explanation: Circuit Working: Parts List: Item Quantity Resistors […]