модуль dc 12v loop delay timer control on off бесконечный цикл регулируемое реле

this module uses a single-chip microcomputer as the main control core. the built-in watchdog circuit and dedicated reset chip of the mcu work stably and reliably. it is a timer relay module, stable and reliable performance. widely used on timer operating equipment, machine repetitive test circuit, fish tank intermittent pump, etc. single mode: 1. does not operate after power-on, the re