more than 12 channels

[dan]

So I can't just add the new gpio pin numbers to the relay-board plugin code?  I am using a pi2.

When I do the shift register route how do I control the relays using your sip software I don't see a way to do it in sip? How does sip know how to call the other relays? Where is that setup?

This is great software!!

The pins are defined in relay_board.py in the plugins dir. line ~55.

The software was originally written to work with shift registers. It will work with them without software modification. When a station is turned on the software disables the shift register outputs, feeds a list of ones and zeros into the shift registers (serial input), 1 for a station that is on and 0s for the rest. Then the outputs of the shift registers are enable and the corresponding relays are turned on or off (Parallel output). I hope that makes sense.

This operation is coded in the set_output() function in gpio_pins.py line ~193 in the SIP dir.

You might find this helpful:
http://www.electronics-tutorials.ws/sequ...seq_5.html

This is also interesting:
http://www.electronics-tutorials.ws/blog...rcuit.html

Dan