[Cialug] Raspberry Pi 3

[Dave Weis]

That makes sense. Mine appears to be identical to that one just twice as
large.

Thank you
dave




On Mon, Feb 29, 2016 at 9:08 PM, Jeffrey Ollie <jeff at ocjtech.us> wrote:

> The relays need 5v and quite a bit of amperage to actuate.  The Raspberry
> Pi's GPIO pins operate at 3.3v and can't deliver much current, but that's
> enough to drive the optoisolators that ultimately trigger the relays.  The
> jumper on the right should be removed and provided 5v power on the JD-VCC
> pin from a separate (constant) source.  The GPIO pins are then connected to
> the IN1 & IN2.
>
> This diagram shows approximately how I have my RPi hooked up:
>
>
> https://camo.githubusercontent.com/1afa45cb01b8bb7bed965bd2d4ff4d6e0d2a60ba/687474703a2f2f692e696d6775722e636f6d2f59516a4f7875592e706e67
>
> On Mon, Feb 29, 2016 at 8:52 PM, Dave Weis <djweis at sjdjweis.com> wrote:
>
> > What does the jumper on the right do? I bought a knock off 4 relay
> version
> > and was worried to move it.
> > On Feb 29, 2016 8:39 PM, "Jeffrey Ollie" <jeff at ocjtech.us> wrote:
> >
> > > On Mon, Feb 29, 2016 at 7:53 PM, Zachary Kotlarek <zach at kotlarek.com>
> > > wrote:
> > >
> > > >
> > > > If you’re confident you garage door will never put out something
> > harmful
> > > > on the signaling line you can interface it using a fairly simple
> > > > transistor-based circuit. But you shouldn’t. Those 3.3v electronics
> are
> > > > sensitive and a relay that will protect you is cheap. You can get
> > > > solid-state relays that will trigger directly on logical-level
> outputs
> > > from
> > > > the Pi and get both simple circuit design/construction and lots of
> > > > isolation.
> > > >
> > >
> > > This is the relay I'm using:
> > >
> > > http://smile.amazon.com/dp/B0057OC6D8
> > >
> > > --
> > > Jeff Ollie
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>
>
>
> --
> Jeff Ollie
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