Path: utzoo!utgpu!watserv1!watmath!att!att!linac!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!umriscc!mcs213j.cs.umr.edu!robf From: robf@mcs213j.cs.umr.edu (Rob Fugina) Newsgroups: sci.electronics Subject: Re: Programmable Multi-Tone generator wanted Message-ID: <1694@umriscc.isc.umr.edu> Date: 20 Nov 90 00:57:38 GMT References: <3066@cooper.cooper.EDU> Sender: news@umriscc.isc.umr.edu Organization: University of Missouri - Rolla Lines: 17 I just saw a number I recognized...or at least it looked very similar to a chip I'm using for a doorbell...I'm using an AY-3-1350. I bought it from Radio Shack a number of years ago and never used it for anything. It's a melody synthesizer. It has 25 preprogrammed tunes and 3 chimes. The spec sheet that came with it is now well worn, and I can't read all of the values on the sample circuit schematic on it. Can anybody tell me where I could get similar specs on this chip, and possibly even a copy of the sheet that came with it from Radio Shack? They don't carry the chip any more, by the way... If anybody's interested, the circuit amounts to a power supply that switches on automatically when a doorbell button is pressed, and powers down when the chip is done playing a tune. Also 3 small circuits that set pitch and speed, a small amplifier circuit for the audio output, and last but not least, a set of swiches that choose which tune is to be played. If you can tell me where to get specs, please mail me directly... s096128@umrvma.umr.edu OR robf@cs.umr.edu THANX!