One way to give steady current to laser diode is using a Simple Laser Diode Driver Circuit using IC LM317; as laser diode are very sensitive to current and with wrong current can damage it. Furthermore, LM317 usually gives voltage but here it gives constant current instead. Circuit Working: Parts List: Components Values Quantity Resistors […]
LED and Lamps
Long Range IR Transmitter Circuit
Compared to basic circuit this Long Range IR Transmitter Circuit can send IR light farther using easy parts, also its main idea is to make IR LED blink light in pulses. Furthermore, most IR receivers catch specific frequency made by IC 4047. Using more LEDs together or stronger LED gives more IR light, so with […]
Basic Circuit for Multi-Way Lamp Switching
We can control one bulb from many places using Basic Circuit for Multi-Way Lamp Switching. People also refer to three-way switches as two-way switches and they refer to four-way switches as intermediate switches; also they commonly use both types in multi-way switching systems. Firstly, three-way switches go at both ends like at hallway doors and […]
How To Test a Multi-Core Wire using Cable Tester Circuit
We can learn How To Test a Multi-Core Wire using Cable Tester Circuit through this tutorial, also this tool check if cable is working or not. Also, it helps find wrong connection like short or broken wire. This circuit works well for testing multi-core cables that contain several wires, also it helps check whether all […]
Simple Door Keyhole Light Circuit
When ON, small device like Simple Door Keyhole Light Circuit gives light to keyhole, as it helps to put key in hole when light is low. Also, it uses light sensor and circuit to check light level, hence, to switch it by light we used transistor and LDR. Circuit Working: Parts List: Components Values Quantity […]
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, as it uses LDR to make LED flicker like real flame and turns ON when its dark; also LDR controls the LED. Furthermore, in bright light the LDR has high resistance so LED stays OFF […]