[sci.electronics] infrared<---->radio converter??

jhh1@ra.MsState.Edu (Jim H. Harfst) (07/03/90)

Does anyone know if anybody makes a converter to convert infrared remote
signals to radio(AM,FM,shortwave or what)?  What I want to do is to be able
to control my VCR from my bedroom with my remote.

My vision of how this thing should be is to have two devices.  One that sits
in my bedroom, or any other room, that converts the signals from the remote 
to radio.  And another unit sitting in my living room in front of my VCR to 
convert the radio signals from the other unit back into infrared for the
VCR.

If anyone makes such a product, I would be grateful if you would give an 
address or phone number or both of where I could get one.  Also, would this
device let me have more that one infrared--> radio boxes? i.e. one in the 
bedroom and one in the other bedroom, and would this device work on all my 
remotes (stereo, TV, VCR, CD,etc) without having to modify it?

Any replies would be appreciated.

Thanks,

Jim Harfst
Mississippi State University
jhh1@ra.msstate.edu

donm@hpnmdla.HP.COM (Don Montgomery) (07/10/90)

Maybe one of the offerings from Radio Shack could solve your problem.  They
have a gadget called an "INFRA-RED REMOTE CONTROL EXTENDER" and is pictured
on page 110 of their 1990 catalog.  Part number is 15-1289.  Don't let the
picture fool you; the box is actually about the size of a pack of king-size
cigarettes.

After looking at the instruction book, it appears to be an infra-red detector
that bias tees into the coaxial cable. A 9 volt wall transformer supplies the
power.  At the other end of the cable is an IR LED that is placed in the vicin-
ity of the instrument to be controlled.  The manual warns the user that you
must retain DC continuity throughout the cable system, thereby precluding the
use of splitters, amplifiers, etc. Unfortunately, they don't mention how far
away one can mount the IR LED from your VCR, etc.  If it were strong enough,
you could conceivably place the transmitter IR LED nearly anywhere in the room,
pointed at the device to be controlled. You can also get the extender with a 
second IR LED on special order so you can control yet another remote instrument.

Check it out.  At $49.95, I don't see how you can go wrong.  If you're looking
for a true RF unit that can go thru walls, this thing won't help, but such con-
trollers are available.

				Don Montgomery,K6LTS
				donm@hpnmdla.HP.COM