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circuit for ultrasonic sensor using PIC18F452

Posted: 01 Oct 2010 07:08
by LIP
hi

can i use the circuit to produce 40khz for the ultrasonice sensor to work

can anyone explain the circuit, the part about buffer for the transmitter part and the amplifier for the receiver part but i dun understand the 4011 IC and the osc1 and osc2 for ?