- Wed Apr 24, 2013 12:05 pm
#158826
I'm trying to use a Panasonic AMN33111 digital output PIR sensor to trigger a device. The device is triggered by grounding a 3v signal line. The AMN has an active high output line. I was able to prototype the behavior I want using an mbed dev board, but I'd like to try and wire this using just a transistor. I've tried using several NPN transistors (BU806 and BU408) and it sort of works. The issue I'm seeing is that the output of the sensor does not behave correctly when wired in my circuit. Instead of being off when no motion is detected and on (3.2v) when motion is detected as it works when not connected to the transistor, it continually jumps between 0 and 3v, like the sensors internal circuit never stabilizes.
I have the emitter of the transistor connected to ground, the collector connected to the 3v signal line of the device I'm trying to trigger and the output from the AMN connected to the base.
Any suggestions for what I'm missing?
Thanks!
I have the emitter of the transistor connected to ground, the collector connected to the 3v signal line of the device I'm trying to trigger and the output from the AMN connected to the base.
Any suggestions for what I'm missing?
Thanks!