tube isn't lighting

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NicholasIII
 
Posts: 3
Joined: Thu Jul 05, 2012 3:09 pm

tube isn't lighting

Post by NicholasIII »

Just put together my ice tube clock, but having problems with the tube (i think). The volt meter is coming back with good voltages, and i reflowed all solder joints, even checked the components. But no luck yet. When i plug in i get a beep but no display.

I'm getting:
9.4 V Off wall wart
9.06 V on Pin 1 ic3
0.0 V on Pin 2 ic3
5 V On Pin 3 ic3
4.6 V on q3 pin 1
0 v on q3 pin 2
4.7 on q3 pin 3
52.3 V on d3 w/o vfd chip
14.3 V on d3 w/ vfd chip
4.7 V on r3 w/o vfd chip
4.67 V on r3 w/ vfd chip

I've been reading the forums and what i can gather is the pins for the tube should be getting voltage. So i checked.
Pin 2 was 4.67V
Pin 13 varied 1.2 to 1.4
Pin 20 varied between 0.0 and 3.6

Hope you can help. Please let me know if you need anymore info.
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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: tube isn't lighting

Post by adafruit_support_bill »

The numbers sound OK, but the photos are a little fuzzy. Probably too little light. If you shoot them outside or next to a window it might give you better detail.

Also a shot of the solder-side of the tube-board would be helpful.

NicholasIII
 
Posts: 3
Joined: Thu Jul 05, 2012 3:09 pm

Re: tube isn't lighting

Post by NicholasIII »

Yeah sorry took them on the workbench under florescent. Murphy's law caught me, right after sending, I think i found the problem. The tube was twisted one pin to the left. You may be able to see it in the pict? I was able to unsolder the tube but the board got a little too hot. I'm going to get another end board and try again. When i get it up and running i'll send a pict.of the finished project. Thanks.
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