Diode

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Diode

October 14, 2013, 05:08:44 pm

I know what a diode is used for,but can someone tell me why there is one between the positive and negative post for the 12 volt DC air compressor solenoid?
Thanks in advanced.

Re: Diode

Reply #1 – October 14, 2013, 05:18:02 pm

Tom,
Most likely a Zener diode. Here is a link to a simple explanation Zener diode - Wikipedia, the free encyclopedia and a more in depth version
Zener Diode as Voltage Regulator Tutorial
Pamela & Mike

Re: Diode

Reply #2 – October 14, 2013, 06:21:06 pm

If the diode is across the 12 volt auxiliary air compressors wires it most likely is there to prevent back EMF (electromotive force) voltages from spiking other items, such as lights and electronics which may be voltage sensitive.

Re: Diode

Reply #3 – October 14, 2013, 06:30:33 pm

We use a lot of them as Jim said, protect other components from the flyback emf.

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