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Well, I am using 5V / 2.1A power supply. However, I am not using PiTFT display. Raspberry seems to work fine. I will try with another 3.3V pin and maybe with more powerfull power supply (more than 2.1A), if I am able to get it.
A little bit more explanation. I connected:Geiger counter serial port:- pin 1 (marked with black triangle) to RPi PIN 6 (Ground)- pin 4 to RPi PIN 8 (Tx)- pin 5 to RPi PIN 10 (Rx)Geiger counter pulse port:- pin 1 (marked with black triangle) to RPi PIN 14 (Ground)- pin 3 to RPi PIN 1 (3.3v)As I said, when I disconnect Geiger counter Raspbery starts up and boots normally.
Hi, I have the same problem. I connected all pins, removed battery from Geiger, and when I connect RPi to power, it doesn't turn on.I have RPi 3.Any solution?