Free Circuit Diagram

RJ45 is used to connect Ethernet port on your computer. There are two configuration: straight and cross. Straight RJ45 cables should be used to connect between computer and device such as switch or hub, and cross RJ45 cables should be used in computer-to-computer connection.  Some hub or switch has the capability to detect the cable [...]

This pin diagram will be  useful when viewing these connectors. Sometimes you hold a soldering iron to the back of the connector, and you don’t remember the numbering of the pin. Here is the pin diagram for your reference: The number of each pins are actually  stamped on both sides of any D-type [...]

This circuit is similar with our previous dimmer circuit, but the gate control is full-wave rectified using diode bridge. This circuit can be used to replace electric switch for your incandescent lamp, brushed motor, soldering iron or heater. Here is the schematic diagram of the dimmer switch: Please note that his dimmer switch [...]

Our reader Andrea (andrea[dot]perugia[-at-]gmail[dot] com) sent his circuit to us, and he creates the circuit for educational intent. The main purpose is to show that you can toggle an output state electronically, although physically you use only a push button switch. Here is what he said about the cicuit : This simple [...]

This is a circuit of differential analog switch. This circuit uses  the FM1208 monolithic dual. Here is the circuit: This circuit is ideal choice for an accurate multiplexer because RDS (on) for the monolithic dual tracks at better than ± 1% over wide temperature ranges (-25 to +125°) although it is unusual. [...]

STANDBY/ON switch below is appropriate for applications (industrial and telecom, for example) in which the circuitry must remember its state (STANDBY or ON) after a power failure that occurs when there is no operator. Because the state can be lost if leakage current drains the battery, we can not just rely on an alternative approach [...]