This is an ultrasonic ranging circuit. Feature : The current consumption, at 2.5 Amps during the sonic burst, The 150mA quiescent current, The maximum range of 10.7 metre, The minimum range of 26cm. Component : Capacitor, resistor, PIC12C508, ST232CD, N1076, LM6032, LP301, transistor, diode. [robot-electronics.co.uk]
