Yeah, these things can be bought cheap, the point is to have fun improving it! (as you well know) -- Lawrence Lile "Jan-Erik Soderholm XA (TN/PAC)" Sent by: pic microcontroller discussion list 01/07/2004 10:35 AM Please respond to pic microcontroller discussion list To: PICLIST@MITVMA.MIT.EDU cc: Subject: Re: [PIC:] Frequency dividing to 440 Hz Koen van Leeuwen wrote : > The 'problem' is in the tuning fork feature, which I am > making too hard perhaps. I don't like listening to square > waves so I thought of a 1 bit D/A converter using the USART > and an audio power opamp integrator (hmm nice thing)... Or, if *only* generating 440Hz, a passive low-pass filter to "shape" the waveform. B.t.w (and absolutly not as much fun :-) ), I bought a guitarr tuning device for about $15. Generates all 6 tones and has a builtin "analog" LCD meter that shows how far out of tune you are. Everything packed in something like a matchbox... Jan-Erik. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads