This laser current driver provides a stable and adjustable output current from 0 to 300 mA with 100 µA step resolution for driving laser diodes used in quantum systems. The terrestrial version is controlled via a USB interface and a dedicated GUI, enabling straightforward current setting and monitoring. The driver can be customized for different laser diode types to match specific optical requirements. A space-qualified, CubeSat-compatible version is also available, featuring an SPI interface and optimized for integration into quantum payloads. The driver is suitable for quantum light sources, entangled photon sources, and optical transmitters in both laboratory and space environments.