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WTK. Powering a "high power" relay

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thestroke

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WTK. Powering a relay

I am currently trying to use an output signal from a microcontroller to activate the coils in a high power relay, but the microcontroller output is too weak to switch on the coils. What can i use to get the relay to switch on? Its a arduino microcontroller, and so far using transistors or smaller relays to switch on the larger are all I have in mind., but i dont want to do either. is there some kind of IC that i could use that utilises an external power supply to activate the coils?
 

Re: WTK. Powering a relay

yes their are are IC s that do this...

..just like you get stepper motor drivers......steper drivers are basically just switching the coils of a motor instedd of a relay.


maybe a stepper driver is what will do it for you...i think they have flybakk diodes in them too

i suppose you dont want to do it with a transistor cuzz you need a series resistor, grounding resistor, etc etc....in other words , youre after low compoent count ?

what about a MOSFET driver such as the 4426 4427 4428 family....mind you they dont have the flyback diode
 

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