Looking for a project to learn KiCad.
I love the color of neon and this design will use 5 per arm.
5 x 7 x 6 = 210.
I think I have 400 of them in a bag someplace. Will use 6 latching BCD to seven segment ICs
CD74HC4511E . CD to Seven-Segment Decoder / Driver / Latch, HC Family, 7 Output, 10 mA, 4.5 V to 5.5 V, DIP-16
and discrete transistors to provide the high voltage drive.
The driver transistors are 20 bucks per hundred. The ripple counters are about ten bucks. I already have some high voltage power supplies.
DC-DC Boost Converter 8~32V to 45~390V High Voltage Charging Booster
I should see plenty of change out of a hundred bucks.
It will use 4 BCD GPIOs and 6 clock signals ...oops forgot the decimal points. Make that 11 output pins on the Arduino. Or I could go really agricultural and use an Arduino Mega with its 54 pins and drive each segment directly.
The challenging bit will be programming the Arduino. Deriving a timing reference and laying out the PCB in KiCAD.
I was trying to think of some artistic way of mounting the neons. Perhaps a copper wire trellis? Nothing seemed interesting. Just regular PCB makes sense and isn't getting too clever clever.