Arduino forum,
I have seen several posts here about the JSN-SR04T v3 ultrasonic sensors.
While I have several projects using the Arduino Nano I also I have a Pic microcontroller prototype board already driving an HC-SR04 sensor.
I used this setup to just drive the TRIG pin with 20us waveform but the ECHO pin is always about three volts on my scope. I have two of these units and I have tried all combinations of boards and sensors. There is no resister soldered onto the pads so it is in mode 0.
Reading the data sheet didn't help.
Any suggestions?
JerryD
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