From: daver!dlb!netcomsv.netcom.com!oakhill-csic.sps.mot.com!jeffh (Jeff Hunsinger-Systems) To: o-intelhouse@dlb.com Date: Wed, 5 Jan 94 14:40:54 CST Subject: Re: Remote control codes Here's what I discovered using a Sharp TV IR remote: Start Pulse = 9.2 ms pulse followed by 4.4 ms silence 1 = ~700 us pulse followed by ~1.5 ms silence 0 = ~700 us pulse followed by ~400 us silence Measured pulse and silence periods had about a +-100 us variance. My guess at the format: LSB first, 8 bit device code, 8 bit command code, with each code sent in normal and inverted format. TV device code = $0B Command codes: Power = $0B Ch. Up = $0C Ch. Dn = $0D Vol Up = $0E Vol Dn = $0F Mute = $10 So, the power command would look like: <Start pulse + silence> 0001 0100 1110 1011 1101 0000 0010 1111 My Sharp VCR uses a different format, strangely enough. I don't have the notes handy, however... Jeff Hunsinger jeffh@apache.sps.mot.com