This is a good project for beginners as well as for those of us who have fond memories of such things. A word of caution: because of the high voltage requirements of the Nixie tubes, this circuit runs directly off the mains, so please exercise extreme caution when assembling and troubleshooting. Be sure to place the assembly in a plastic or wooden enclosure....

The need for a compact telemetry system poses a challenge for designing a small, light, low-component-count system....