2n3904 relay driver schematic

But the output of that transistor will not directly drive the relay due to which we have used a 2N NPN transistor. The circuit will work on wide supply voltage like from V to 12V DC. The relay should be used according to the operating voltage. These simple optocoupler relay driver circuits can be used in variety of electronic.  · 2N is an NPN transistor hence the collector and emitter will remain open (Reverse bias) when the base pin is held at ground and will be short (Forward bias) when a signal is provided to the base pin. 2N has a gain value of ; this value determines the amplification capacity of the transistor. The maximum amount of current that could Estimated Reading Time: 1 min.  · Now, we will make driver that can control a relay with various voltage. Here’s the schematic: 1 K resistor, NPN transistor (2N or 2N or other replacement), 1 diode (1N or 1N or other replacement). The VCC needed is according to relay voltage. If you use 5V relay then you need 5V, if 12V then apply 12V and so www.doorway.ruted Reading Time: 2 mins.

It is a simple electronic circuit that provides a visual cue in the form of a flashing LED. An LED flasher circuit employs a voltage source, a capacitor, and an LED. In this project, we are going to build simple LED flasher circuits using a 2N NPN Transistor. If the relay in fact only. needs 71Ma then I would use the beta of the 2N @ Ma is min of Base current would be 71Ma/30 =Ma. The resistor would be ()/Ma. =K. I would use a K ohm resistor to insure collector saturation. The great thing about electronics is unlimited ways to do the job. Circuit Diagram Of The Relay Driver Unit Scientific. 2 Channel Relay Board Electronics Lab Com. Low voltage 12v relay driver using lmc timer ic transistor circuit in digital eleccircuit com with formula and calculations homemade projects how to build a uln its applications 12 volt dc solid state buz71a switch pinout equivalent datasheet.

12 វិច្ឆិកា I need to close a 12v circuit with the collector. The 2N will need to drive some kind of 12V relay that requires less than mA. Sep 6, - In this tutorial, we are going to make a circuit of Optocoupler Relay Driver. Optocouplers are electronic components that are used to transfer. Amplifier modules like Audio amplifier, signal amplifier etc Driver modules like relay driver, led driver etc 2N Manufacturer.