Desarrollo de una fuente de alimentación de bajo costo con múltiples salidas ajustables para la operación de fotomultiplicadores de silicio

We present the design of a low-cost (~$400 USD) and high-precision power supply for silicon photomultipliers (SiPMs), widely used in particle detection and photon-counting applications. The system provides four independent output channels, each delivering a tunable bias voltage from 10-58 V with 10mV resolution and less than 1mV noise level. Each channel incorporates a PT100 temperature sensor (15 °C–40 °C range) enabling real-time thermal monitoring and automatic temperature-compensated voltage adjustment to stabilize SiPM gain. The device also supports individual voltage calibration and storage of optimal operating points. Integrated current limiting (100μA/channel) protects the sensors. This compact and versatile design offers a cost-effective alternative to commercial systems, with features tailored for research and development settings.