Imagine two semi directional microphones Vcc ! Right motor Right ear >--Amp-Filter--Rectify----!+\ ! ! >-----+ Left ear >--Amp-Filter--Rectify----!-/ ! Left motor ! Vee It looks like a couple of Quad op-amps and a PNP-NPN pair will do the whole thing if you don't mind it…
Read the full replyHi folks,
I'm considering building my next generation of pull cart robots. The first was controlled with a pic16876 and car door lock remote control. Does anyone have a suggestion on methods and components to use for getting the bot to follow me as I walk. I think the comercial versions of this have a clip on device that transmits high frequency sound. Any suggestions or good ways to approach this? thanks jim
Imagine two semi directional microphones
Vcc ! Right motor Right ear >--Amp-Filter--Rectify----!+\\ ! ! >-----+ Left ear >--Amp-Filter--Rectify----!-/ ! Left motor ! Vee
It looks like a couple of Quad op-amps and a PNP-NPN pair will do the whole thing if you don't mind it crashing into you a lot.
Adding a third microphone for the up direction, would allow a bit of logic to stop the motors when the angle to the sound was over 45 degrees. You can PWM the motors at 3/2 the audio frequency to keep their whine out of the audio stuff.
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