Flyback Diode on FP out?

For engine experimenters, the MicroSquirt® PCB is offered in a module format with enhanced capabilities to be plugged into other boards. This is the place to discuss the MicroSquirt Module.
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pigga
MegaSquirt Newbie
Posts: 6
Joined: Tue Oct 06, 2009 8:43 am

Flyback Diode on FP out?

Post by pigga »

Hi,
Just one short question: I would lile to use the FP out to switch the fuel pump relay. Should I set a diode in order to protect the FP port from the high flyback voltage coming from the relay coil?

Thomas
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Matt Cramer
Super Squirter
Posts: 910
Joined: Sat Jul 03, 2004 11:35 am

Re: Flyback Diode on FP out?

Post by Matt Cramer »

It wouldn't cause any problems to add one, but it's not needed, either.
Matt Cramer at DIY Autotune
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Bruce Bowling
Site Admin
Posts: 285
Joined: Mon Feb 16, 2004 4:25 pm
Location: Baltimore, MD

Re: Flyback Diode on FP out?

Post by Bruce Bowling »

Flyback diode is not needed- driver is avalanche-rated

- Bruce
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