So here in this project, we are going to make a Simple Automatic Street Light Circuit using LDR and Relay, which will turn on and off the light bulb based on the lights in surroundings. This circuit ...

The relay RY1 will be turned on when 12V dc supply is applied to the circuit. The transistor T1, and hence the relay RY1, is off when the control signal input J1 is 12V. Obviously, we need a ...

Besides we are using 12v relay in this project. Vin pin of Arduino cannot easily supply this much current for both relay. Hence transistors are used to conduct current from Vin pin of Arduino to relay ...

It can drive a variety of relays, including a reed-relay. Transistor Q1and Q2 are a simple common-emitter amplifier that increases the effective sensitivity of the 12 volt relay coil about a 100 times ...

This is a simple clap switch circuit with high sensitivity. The only unusual component is the single coil latching relay. While there are numerous means of generating the latching function, the ...

The power consumed by the relay may be unsuitable for battery-powered applications. Here is a simple solution using some inexpensive components to considerably save power. Circuit and working of Relay ...

The normally connected (NC) lead of the relay isn't joined to the 15-V dc supply, ... If You Build A Smart Battery Charger Using a Single-Transistor Circuit, Beware the Consequences.