This post show how to make a Simple Arduino LED Dimmer Circuit using PWM. PWM changes voltage by changing square wave duty cycle. It changes duty cycle to make LED more or less bright. More power means more brightness. Coding: Circuit Working: Parts List: Component Quantity Resistor 220Ω 1/4 watt 1 10k 1/4 watt 2 […]
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Simple LED Flashing Circuit with Arduino Uno
This project for Simple LED Flashing Circuit with Arduino Uno is simple guide for learn electronics and Arduino. We can learn connect parts and use code to blink LED. It look easy but help us learn big and understand hard projects later. Coding: Code Explanation: Circuit Working: Parts List: Component Quantity Resistor 220Ω 1/4 watt […]
Simple Laser Diode Driver Circuit using IC LM317
One way to give steady current to laser diode is using a Simple Laser Diode Driver Circuit using IC LM317. Laser diode are very sensitive to current and with wrong current can damage it. LM317 usually gives voltage but here it gives constant current instead. Circuit Working: Parts List: Category Item Quantity Resistors 330Ω 1/4 […]
Basic Circuit for Multi-Way Lamp Switching
We can control one bulb from many places using Basic Circuit for Multi-Way Lamp Switching. Three-way switches are also called two-way and four-way switches are also called intermediate which are also used. Three-way switches go at both ends like at hallway doors. They have 3 terminals: Traveler 1, Traveler 2 and Common. Four-way switches go […]
Simple Door Keyhole Light Circuit
When ON, small device like Simple Door Keyhole Light Circuit gives light to keyhole. It helps to put key in hole when light is low. It uses light sensor and circuit to check light level. To switch it by light we used transistor and LDR. Circuit Working: Parts List: Category Item Quantity Resistors 47k 1/4 […]
Simple Electronic Candle Circuit using LDR
This article for Simple Electronic Candle Circuit using LDR is fun and easy project to make fake candle with LED. It uses LDR to make LED flicker like real flame and turns ON when its dark. LDR controls the LED. In bright light the LDR has high resistance so LED stays OFF. And when its […]