Computing stuff tied to the physical world

Meet the new Opto-coupler Plug

In Hardware on Oct 29, 2010 at 00:01

The plug barrage continues…

This time it’s an update of the flawed Opto-coupler Plug, which only worked properly on one channel (unless you patched it up). So here’s the new Opto-coupler Plug v2:

Dsc 2185

Wait! There’s more! It’s actually two plugs in one now:

Dsc 2186

(note: the solder jumpers need to be shorted out to use this as an output board)

Since there was enough room on this board, I decided to make it more versatile: it can now be used as dual Opto-coupled input (as before) or as dual Opto-coupled output plug. In the latter case, the JeeNode drives the IR LEDs and the output is a phototransistor which can be used as low-power (polarized) switch for some external device. The choice is determined by how the IC socket and Opto-coupler are hooked up.

The connectors are the same as before: detachable screw terminals, these are very convenient because you can prepare the wiring elsewhere and then plug / unplug / swap channels as needed.

I have no immediate use for these plugs right now, but of course I had to make sure that everything is working properly, so I hooked both of them up:

Dsc 2190

On the back you can see how things were connected together:

Dsc 2191

Here’s the updated opto_demo.pde test sketch for that – I decided to send the results by wireless for a change:

Screen Shot 2010 10 28 at 18.11.23

Sample output on my central JeeLink:

Opto Output

Yippie – looks like it’s working exactly as intended! Note the inverted signals, BTW.

Docs and shop have been updated for this new plug version. If you have version 1, please let me know and I’ll send out an updated board to you.

  1. Hmm.. to be honest it’s getting a bit “boring” a new plug post every day… :-) But keep em’ coming! Would be nice to add some variation about other topics..

  2. Looks very nice… I just went to see if there was such thing as an 8 pin 2 channel opto triac/triac driver which would fit… Guess what, they don’t exists!

    Not fair!

  3. Nice plug. I like the feature of Input or Output of this plug. Keep on developing new plugs !


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