Connector Considerations; Expanding Notes - Ramsey Electronics URC1 Owner's Manual

Connector considerations :

Upon design of this kit we determined that we would use standard
size connectors for interface. We ended up using connector cables from PCs
to determine what sizes you may have laying around at home, or available at
the local electronics store. Connector 1 uses a 34 pin connector, which is
common on most hard drives, and connector 2 uses a 14 pin connector which
was a common size in the stores near here.
To connect these up you can bring the wires of the ribbon cable out to
a connector board that you devise yourself, or add on some wire to run
directly to the device you wish to control. Use the look up tables on pages 20
and 21 to determine what wires go where. Note that pin 1 and wire one are
marked so that you don't get confused.

Expanding Notes:

If you decide to expand your URC1 to take full advantage of the
number of outputs it may control, notice how almost all of the chips in this kit
are serially accessed. They all work in much the same way as a serial latching
shift register, so all that needs to be done is to cascade the devices. (We will
leave this up to you to figure out and experiment with). Note that U1 and U3
are already in the cascaded form (you can use their example to expand the
number of outputs). If you don't feel too confident in doing it yourself, we will
be coming out with an expansion kit in the near future.
URC1 • 28