The 4-channel ultra-sonic wave generator circuit of the projector

Published:2011/7/7 0:01:00 Author:qqtang | Keyword: 4-channel, ultra-sonic wave generator | From:SeekIC

To remote control the projector, we often need 4 channel signals of different frequencies, i.e forward, backward, focus ahead focus backward, at the moment, the figured emitting circuit can be used. In the circuit, the oscillator consists of the transistor T, when the inductance L1 is stable, it is linked to different capacitors and generates signals of different frequencies. The figured V means forward, S means backward, S+ and S- mean focus ahead and focus backward respectively.



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