how can i modify the circuit by replacing the LED and photo diode by using ultrasonic sensor? Answered

Please for any one who is capable of drawing a schematic diagram on how i can modify, and use ultrasonic sensor  as a transmitter and receiver for my circuit to work well. also i want it to operate without using micro-controller. 

Question by YallajevoM 1 year ago  |  last reply 1 year ago