112v battery for old school Geiger counter

thingiverse

I collect vintage Geiger counters from the 1950s, meticulously repairing them with precision. These classic devices often require high-voltage batteries that have become obsolete over time. In the past, I've employed DC-DC converters as a substitute, but this solution has its limitations. A more ideal option is the use of 3V CR2032 or similar batteries, which offer a perfect blend of affordability and versatility. A single pack of five costs just $2, making them an attractive choice for any project. I've chosen to separate these cells into four compartments for added convenience. One particular Geiger counter required a custom solution - it demanded a 45V + 67.5V battery in series. To overcome this challenge, I replaced the traditional batteries with a single, high-voltage pack that delivers an impressive 112V. This innovative design features pressed-together cells held securely by a small nut and bolt. The cells are expertly aligned using a custom recess in the 3D-printed housing, ensuring a precise fit. The finishing touches include copper end plates and carefully routed wiring to complete the design.