Doughnut Board Nixies Part 5, Mainboard in Progress
The main board of the clock is underway! I now have the chip sockets, the logic power supply, and a little block of switching transistors in place.
I decided to use one of my favorite kind of prototype boards for this - the venerable Radio Shack 276-150. I've built a ton of little circuits on these (like this one), but this clock mainboard has to be the most ambitious.
As you can see, many of the copper pads cover more than one hole. So it's not, strictly speaking, proper to call this a doughnut board. Instead, I call it churroboard.
Doughnut Board Nixies Part 5, Mainboard in Progress
The main board of the clock is underway! I now have the chip sockets, the logic power supply, and a little block of switching transistors in place.
I decided to use one of my favorite kind of prototype boards for this - the venerable Radio Shack 276-150. I've built a ton of little circuits on these (like this one), but this clock mainboard has to be the most ambitious.
As you can see, many of the copper pads cover more than one hole. So it's not, strictly speaking, proper to call this a doughnut board. Instead, I call it churroboard.