Quantity   Component name
1 × raspberry Pi MkII B Main brain
1 × raspberry Pi camera module take pictures to send to twitter
8 × B7971 Smartsocket boards Driver boards for the Nixies, I used these : http://tayloredge.com/storefront/1386_B7971SmartSocket/index.html others are available
8 × B7971 indicator tubes Fourteen segment nixies, obtainable occasionally on eBay, excpect to pay around $80 upwards each. Use as many as you can find
1 × https://www.tindie.com/products/freto/pi-camera-hdmi-cable-extension/ Pi camera extension boards, used to run the camera signal over an HDMI cable.
4 × 1363 HVPS-V High voltage PSU for drving Nixies, each can drive up to three tubes
1 × http://dirtypcbs.com/view.php?share=14240&accesskey=03a603186ce693a85368e67043d333fd PCB to host HV PSUs and 5V regulator, contact me if you need one as I have lots spare
4 × 47k resistor used to set teh output voltage of the HVPSUs
1 × 33k resistor part of the divider that drops the smartsocket 5V output level to 3.3V
1 × 18k resistor part of the divider that drops the smartsocket 5V output level to 3.3V
1 × 100k resistor Pulldown resistor for the
1 × 5V 2A regulator Something like a tracopower TSR 2-2450 would do nicely, lots of other options though