I have tried all the troubleshooting topics first
Checked connections reflowed solder
Checked component installation
TP1 to ground gives single click + red led flash
No click or red led flash if I short across the Geiger tube
I was getting a weird triple? click red led flash once a second if I shorted the negative terminal of the Geiger tube to the second pin to the right on the serial jumper
Any ideas?
Can I exchange for a working board?
Help - not getting high voltage / not detecting
Re: Help - not getting high voltage / not detecting
Can you hear a whine from the speaker?
Have you checked the voltages on the 555 (U1)?
Examples here: http://www.mightyohm.com/forum/viewtopi ... t=10#p5489
Have you checked the voltages on the 555 (U1)?
Examples here: http://www.mightyohm.com/forum/viewtopi ... t=10#p5489
Jeff Keyzer
http://mightyohm.com
http://mightyohm.com