2 layers157.5 × 30.5 mm

Tube Driver
median-dispersion/GMT-Geiger-Counter
Geiger-Müller tube based Geiger counter.
45 partsGPL-3.0
Boards in 2 GitHub repositories, designed in KiCad, that use the STN2580 by STMicroelectronics (-65℃~+150℃ 1 NPN 1.6W 10uA 1A 1V 400V 60 9V NPN SOT-223 Bipolar (BJT) ROHS). See how each wires it, with its parts, size, README and files; the STN2580’s symbol, footprint and pinout are on its own page.

median-dispersion/GMT-Geiger-Counter
Geiger-Müller tube based Geiger counter.

sanketh0103/5V_SMPS-with-Timer
240V - 5V SMPS 1A Power supply, it has a relay that can be used to control mains powered devices. This PCB can also act as a timed switch.