Hi, I have built the ultrasonic sensor ranger with the help of "2002MAR08_RFD_DA_AN.PDF" but it is not working.
Explanation of the sensor:
Base on the availability of the component I choose,
( I )
- ICM7555 instead of TLC555
- CA3130 instead of CA5160 and
- LM567.
- PIEZO ULTRASONIC SENSOR: Module T40-1601
R40-1601, Center Frequency:
40.0khz, with 1.0 khz variation. Etc.( I I )
- Since the reset pin is remain high after given power on transmitter module, I am adding 10k resistance between ground and reset pin.
- At 5 volt supply [after step ( I I ) . 1 ] to the reset pin, it is generating ultrasonic sound. Freq of this sound 39.95 khz (If I try to tune more accurate to 40 khz, It become 40.25, 40.5 khz, but all is with in the acceptable range 39-41 khz).
( I I I )
Nothing happed on receiving end.
Please take look in this issue, and tell me the possible way to solve it.
I have listed a very Impotent response, that I had got before a week:
There should be enough light getting through the gap between the transmitter frequency of 38.75kHz and the receiver at 40kHz +/- 1kHz for you to be able to see the problem yourself.
-- John B
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Thanks
Dibyendu