2n2222 relay driver circuit

 · Give or take these relays have about a 75 Ohm coil and coil current in the neighborhood of mA. The 2N should do fine driving one. A 2N MOSFET has a maximum continuous drain current of mA. This is why it would be nice to know the coil current. Using a 2N we normally assume a base current of 1/10th the collector current.  · Hi, the 2n have a base resistor of ohms which is connected to a micro. The collector is connected to the relay and the emitter is connected to ground.  · * Now a question arises, Why do we need the extra bit of circuit to drive the relay? The coil of the relay needs a large current (around mA) to drive the relay, which an Arduino cannot provide. Therefore we need a device to amplify the current. In this project the NPN transistor 2N drives the relay when the NPN junction gets www.doorway.ru: Ashish Adhikari.

* Now a question arises, Why do we need the extra bit of circuit to drive the relay? The coil of the relay needs a large current (around mA) to drive the relay, which an Arduino cannot provide. Therefore we need a device to amplify the current. In this project the NPN transistor 2N drives the relay when the NPN junction gets saturated. Give or take these relays have about a 75 Ohm coil and coil current in the neighborhood of mA. The 2N should do fine driving one. A 2N MOSFET has a maximum continuous drain current of mA. This is why it would be nice to know the coil current. Using a 2N we normally assume a base current of 1/10th the collector current. One 2N transistor code lock system is a simplest electronic code lock system. It consists of a relay, a transistor and some passive devices like resistors, capacitors and switches. The circuit is simple but really efficient and works the best. Circuit Diagram: The circuit has only one transistor with a relay as load at its collector.

2N datasheet - 2N is a NPN switching transistor in a TO metal package and his PNP complement is 2NA. 2N datasheet applications: linear. Appendix F - Relay Circuit Board and Measurement Filter The 2N is a common NPN bipolar junction transistor used for general purpose low-power. Abstract: uc motor driver circuit transistor BJT 2N STHI20N50 Rotor Resistor Starter lm motor control under voltage relay lm in circuit.