kinsey
Newbie level 1
hi guys, i am working on the transceiver ultrasound sensor, but still not get the echo signal.
these is my circuit
my programmer is working like this: MCU send 10 pcs 40khz square wave to the transformer (ratio 1:10, the 1st side connect 12V DC power, then the 2nd get 120 V ouput) .
but the circuit still no echo signal.
when i use oscilloscope to check the apmp 1 & 7 foot these is nothing.
when i check the transceiver ultrasound senosr foot, still no echo signal when i move the sensor close or far away to a wall.
(changed 2 more sensors, same status)
looking for advice.
thanks in advance.
kinsey
these is my circuit
my programmer is working like this: MCU send 10 pcs 40khz square wave to the transformer (ratio 1:10, the 1st side connect 12V DC power, then the 2nd get 120 V ouput) .
but the circuit still no echo signal.
when i use oscilloscope to check the apmp 1 & 7 foot these is nothing.
when i check the transceiver ultrasound senosr foot, still no echo signal when i move the sensor close or far away to a wall.
(changed 2 more sensors, same status)
looking for advice.
thanks in advance.
kinsey