Driving BIG loads with your micro controller - no isolation

5 Aug 2014

Back to the base project The Electronic Referee

So you have done blinky with an LED on the board, Now what

You want to drive a BIG LED like a 12V, 10W variety or something, well how you going to do that, the micro certainly cant do it without help and a Relay will still need a driver

You want to drive a BIG Servo or other motor up to 24V, well how you going to do that, the micro certainly cant do it without help and a Relay will still need a driver

These and many other mysteries are out there and in this instance I have a solution for you

The is a quick Peter Cad to go with the video, it is tested and works on a breadboard, go forth and experiment, any questions feel free to post in the forums or in the comments for this post

Enjoy

The next video dealing with OPTO Isolators can be found here Drive BIG things with added safety. OPTO Isolators

Parents

robogary over 3 years ago

I getcha, tho I'm far from an expert on the inner microscopic workings of the FETS. Normally I'm sticking the flyback diode ( and maybe an MOV and/or a snubber ) right on the terminals of the device being driven rather than at the MOSFET.
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robogary over 3 years ago

I getcha, tho I'm far from an expert on the inner microscopic workings of the FETS. Normally I'm sticking the flyback diode ( and maybe an MOV and/or a snubber ) right on the terminals of the device being driven rather than at the MOSFET.
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