MightyOhm.com

Some TIG welding rods contain Thorium, as stated on the Mighty Ohm page with radioactive test sources Oxides used are primarily those of zirconium, thorium, lanthanum, yttrium or cerium. Additions are usually of order 1%-4%. All these oxides greatly improve arc initiation, especially when direct cur...

i figured it out, the coil's enamel wire got disconnected from one of the pins
it's working nicely now.

Hi all, I etched the board and assembled it with the correct parts. I programmed the AVR. When I short GND with TP1 I get a beep and a flashing LED. I don't get any HV, shorting the pins of the geiger tube does nothing. I checked and my 555 timer still works. I need some help to figure out what's wr...