[TriEmbed] Protection from Dual 12V inputs

[Robert Gasiorowski]

How about something simple like this:

[image: Inline image 1]

On Wed, Feb 24, 2016 at 4:52 PM, Grawburg via TriEmbed <
triembed at triembed.org> wrote:

> I have a circuit using two MOSFETs (TO-220F) to control a 12 VDC motorized
> ball valve (Open & Close). The circuit works fine in testing.
> What will eventually turn the MOSFET on (this works as well) is a high
> signal from the RPi.  Only if I write bad code so that
> both outputs are high will I have a problem. Of course, I could NEVER code
> wrong, but just in case, what might I use between
> the Pi (actually an MCP23008 I2C) and the MOSFETs that effectively says,
> "if GPIO1 and GPIO2 are high, block both"? I want
> a device not only something in my Python code.
>
>
> Thanks,
> Brian Grawburg
>
> --
> [This was sent from a PC running Debian 7, 64-bit Linux. No Microsoft
> products were used.]
>
>
>
>
>
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