i am using GL40T ultrasonic sensor,P89V51RD2 MICROCONTROLLER, voice record / playback chip
1. i need a receiver ckt without noise
2.when the transmitter starts burst it has to latch a flipflop and output of FF is given to µc which starts the timer
3.echo signal should stop the timer. can anyone give the program for reading FF and circuits for interfacing receiver and FF
4.circuit for interfacing ISD1420/APR9600 with µcontroller
1. i need a receiver ckt without noise
2.when the transmitter starts burst it has to latch a flipflop and output of FF is given to µc which starts the timer
3.echo signal should stop the timer. can anyone give the program for reading FF and circuits for interfacing receiver and FF
4.circuit for interfacing ISD1420/APR9600 with µcontroller