Hi guys, in need of some assistance
I'm trying to build an ultrasonic ranging module using 40kHz transducers.
I've attached my schematic below. I don't think it's the emitter that's causing me issues. I've tested it down at 4kHz and its produced a nice ringing sound and it's definitely working. So I'm going to assume it's operating 100% at 40kHz.
I've also attached a waveform of what the Schmitt Trigger should be producing at 40kHz.
The receiver circuit is based on two CEAmps. And I've set up a 10mV peak pulse input with an interactive button to simulate "echo" being detected by the receiver.
I'm also using 1n5817 schottkys instead of BAT42s for the peak detector as thats all ive got atm.
When I try to test the circuit, i'm not getting any response at the receiver end so far as I can tell.
Does anyone have any advice? Will this work as intended?
Thanks all.
I'm trying to build an ultrasonic ranging module using 40kHz transducers.
I've attached my schematic below. I don't think it's the emitter that's causing me issues. I've tested it down at 4kHz and its produced a nice ringing sound and it's definitely working. So I'm going to assume it's operating 100% at 40kHz.
I've also attached a waveform of what the Schmitt Trigger should be producing at 40kHz.
The receiver circuit is based on two CEAmps. And I've set up a 10mV peak pulse input with an interactive button to simulate "echo" being detected by the receiver.
I'm also using 1n5817 schottkys instead of BAT42s for the peak detector as thats all ive got atm.
When I try to test the circuit, i'm not getting any response at the receiver end so far as I can tell.
Does anyone have any advice? Will this work as intended?
Thanks all.