Click on photo to view video:
Schematic (Click to enlarge):
Here is where the gauge_02.hex file is located, which is to be programmed into the AVR tiny24 (or tiny44) microcontroller.
The Do-Hickie generates 4 selectable patterns. Push the button to jump to the next pattern. The patterns are:
- Gauge – Which makes an arc that grows larger with louder ambient sounds. Works like a VU meter, on an old tape deck.
- Radar (or choo-choo train) – several dots sweep clockwise, resembling an old radar screen. Or some say it looks like a toy train circling on its short track.
- Jellyfish – Arc grows and shrinks, while slowly rotating clockwise.
- Slinky – Arc grows full size, the closes at opposite end. Reminds me of old slinky toy of my childhood.
Circuit (and code) works with both common 2-guide dekatrons, and much rarer 3-guide hi-speed dekatrons.
Dekatron Do-Hickie Hook-up:
If you happened to have purchased a do-hickie from me, in the past, here is the hook-up guide. There are two sets of “square-post headers”. One is hooked up to the octal socket, where the dekatron is plugged. The other is from the drive circuit itself. This allows you to hook up any dekatron with an octal base to the do-hickie circuit.
Here’s the finished board, I had sent out:
Jumper block J3 has all the signals. Block J4, is wired to the octal socket. Wire wrapping from J3 to J4, according to the pinout of the actual tube plugged into that octal socket.
That jumper wire, on the front, is not a design mistake. Its actually due to debris at the PCB fab, that caused an incomplete etch.