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jayachar88

Control 4 electromagnetic relays

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Have some 5V SPDT EM-relay (called "sugar cube" relays), rated for ~240VAC-10Amps. To switch those, I believe I cannot directly connect them to the MSP430 launchpad I/O pins, right ? I need to use a BJT/FET -- mandatorily ? The 4 relays in turn control incandesent lamps.

 

If anyone has a circuit schematic they could share, it would be very helpful.

 

thanks,

Jay

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simple. common transistors like pn2222 should work.post-60-0-17036200-1383088009_thumb.jpg

 

msp430 pin is the arduino pin etc. 5v to switch the relay up the top. connect the grounds together on your 5v and msp430's 3v supply. can also add a capacitor next to the diode if getting noise issues

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