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ESP01 WiFi relay module for Arduino and other microcontroller projects
This module allows you to control a SPDT (single pole, double throw) relay over WiFi. The ESP01 module (included) is compatible with many microcontrollers (inc. Arduino) and can also be used stand-alone.
This module generates ≈50% duty cycle square waves using the classic 555 timer IC. The frequency of the pulse can be adjusted using the built-in trimmer potentiometer (7Hz-14kHz).
Input Voltage: 5-12Vdc
Size: 29x12mm Output frequency (approx.): 7.2Hz - 14.4kHz