[net.analog] using new technologies.

bmh@unc.UUCP (Brad Hemminger) (10/12/83)

I am looking for technical descriptions of how the following two
technologies work:

	1) high wavelength (infra-red or other) transmitters/receivers
	used in remote control units (e.g. for your TV, VCR, joystick).
	[The ultimate goal being to hook up such a transmitter to a home
	computer, and be able receive such transmissions at several
	locations in the same room].

	2) hardware to recognize different audio sounds (by pitch or
	if possible, syntatic recognization of words).  For example
	I've seen 'play' circuits built that distinguish several different
	frequencies;  another example is Heathkit's Hero1 robot which
	they claim recognizes 20-5000 Hz with 1 in 256 resolution
	(8 convient bits).

Thanks to anyone who can point me to good reference material or pass on
advice and experiences that relate to the above two topics.

			Brad Hemminger
			University of North Carolina, Chapel Hill
			duke!unc!bmh