[RESOLVED] Pulse and serial outputs not working.
Posted: Wed Jan 23, 2013 6:37 am
I finally got FTDI 3.3V adapter and setup XTerm as described, however I'm not getting any signal for Geiger counter on terminal program. Also tried with putty, it simply doesn't send anything to serial.
I suspect that PCB might not be labeled correctly. It says GND by the last pin (6), but when I tested with my DMM (from battery holder negative) it's not connected to ground, it seems that actually Pin1 and 2 are ground. Can you please verify?
Also I'm not getting anything from 3 pin pulse pins when hooked up to Geiger Bot. It might be because I used slightly different R values to reduce voltage (I'm using R1=10K and R2=220). Can you suggest how to measure signal from pulse pins? DMM doesn't register anything, do I need oscilloscope?
I suspect that PCB might not be labeled correctly. It says GND by the last pin (6), but when I tested with my DMM (from battery holder negative) it's not connected to ground, it seems that actually Pin1 and 2 are ground. Can you please verify?
Also I'm not getting anything from 3 pin pulse pins when hooked up to Geiger Bot. It might be because I used slightly different R values to reduce voltage (I'm using R1=10K and R2=220). Can you suggest how to measure signal from pulse pins? DMM doesn't register anything, do I need oscilloscope?