One of the missions of HSU-SAT1 is the on-orbit demonstration of the self-made bus system. As elements of the self-made electric power supply system, it is required to have a power control circuit to prevent heat generation and save power, safety designs to prevent fatal failures caused by radiation damage to the microcontroller and other devices, and to enable autonomous recovery from transient failures. In this study, we have designed and tested a power control circuit with an overcurrent detection function, a periodic reset circuit using timer circuits, and a circuit to shutdown the transceiver. As a result, we confirmed the operation of the intended function.
