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4 channel 5v optical isolated relay module this is a low level 5v 4 channel relay interface board and each channel needs a 15 20ma driver current.
8 channel relay board circuit diagram pdf. 8 channel relay board is a simple and convenient way to interface 8 relays for switching application in your project. It can be controlled directly by micro controller raspberry pi arduino 8051 avr pic dsp arm arm msp430 ttl logic 5v 8 channel relay interface board and each one needs 15 20ma driver current. Input voltage level support ttl as well as cmos. Easy interface with micro controllers based projects and analog circuits.
The 8 channel relay module has its own optocoupler also called opto isolator photocoupler or optical isolator. But pcb of new version of 8 channel relay module. With handle ac supply directly for home automation. It can be used to control various appliances and equipment with large current.
It is equipped with high current relays that work under ac250v 10a or dc30v 10a. Easy interface with microcontrollers based projects and analog circuits. Two input signal connectors are provided to allow seamless cabling to a 501a signal generator using. This is a 5v 8 channel relay interface board be able to control various appliances and other equipment with large current.
Connect the signal terminal in4 in5 of 8 channel relay to digital port 3 2 of the sunfounder arduino mega2560 board and connect an led at the output terminal pay attention to that there are only two submodules of the 8 channel relay are used in this example but you can use the 8 submodules freely 8 channel relay arduino mega2560. It can be used to control various appliances and equipment with large current. Input supply 12 vdc read more. Optocoupler is a component that transfers electrical signals between two state of isolation circuits by using light and prevent high voltage from affecting the system receiving the signal.
So in this diy project we make a 4 channel relay driver circuit to be used in relay based applications. But in this bord is old. The 8 channel relay board offers 8 relays that can be individually configured as either a contact closure form a or as a voltage source if power is connected to an auxiliary connector. In here we have designed an isolated pcb for 4 relays to operate 4 ac appliances at a time.
Input voltage level support ttl as well as cmos. It is equipped with highcurrent relays that work under ac250v 10a or dc30v 10a. Relays are frequently used in our electronics applications specially when we need to drive high loads from microcontroller circuits. This project is a general purpose 8 channel relay board.
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