Originally Posted by grahamlthompson:
“And how would you control the 2nd Hummy (only one remote control channel) ?”
You use a programmable universal remote control that can control devices by both infra red (IR) and radio frequency (RF).
You program the remote control to operate one Hummy directly via IR only, and operate the other Hummy via RF only. For the latter you also need a receiver unit that receives the RF and converts the signals into IR that is emitted via a small emitter unit that you stick to the front of the second Hummy. In this way both Hummies can be in the same room, but each can be controlled independently. If you want, you could put both Hummies in a cupboard and operate both via RF.
I believe that the most expensive Logitech unit can do this, but I was not keen on the styling, so I went for the Universal Remote Control Inc (that's a US company) "Aeros 850" remote control, plus "MRF 250" receiver unit (about £120 and £40 respectively from Ebay).
The Aeros 850 can control up to a total of 20 devices, and you program it using a very slick Windows application. The MRF 250 can support 6 devices (and you can use more than one MRF 250 if you need to control more than 6 devices via RF).
Universal Remote Control Inc can be found here:
http://www.universalremote.com/
Be advised that they have not been without controversy in the last couple of years, due to a change in their support policy. The following is a good site for discussions of remote controls, where you can find out more about this:
http://www.remotecentral.com/
-- from CyberSimian in the UK