Hello,
The project is an automatic gate opener (small scale)
I'm using the circuits attached to this thread to drive the sensor to detect the presence of a car (or any object) at first the receiver and transmitter are not facing each other so when there is an object it reflects the Ultrasound wave and the receiver detects it giving a signal which is amplified and the brought through a tone decoder, and that signal is used to trigger a mono-stable timer for about 10 seconds which switches an H-bridge using relays and then closes after that time.
Now the problem is, (other that in the transmitter circuit pin 6 and 7 i fixed that) the sensor doesn't seem to work... what could be the issue? and i triple checked the values... so can u find anything ???
The project is an automatic gate opener (small scale)
I'm using the circuits attached to this thread to drive the sensor to detect the presence of a car (or any object) at first the receiver and transmitter are not facing each other so when there is an object it reflects the Ultrasound wave and the receiver detects it giving a signal which is amplified and the brought through a tone decoder, and that signal is used to trigger a mono-stable timer for about 10 seconds which switches an H-bridge using relays and then closes after that time.
Now the problem is, (other that in the transmitter circuit pin 6 and 7 i fixed that) the sensor doesn't seem to work... what could be the issue? and i triple checked the values... so can u find anything ???
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