Relay Module 12V With Timer 555

From the shop's description

Relay Module 12V With Timer 555 This 12V Delay Timer Switch Adjustable 0-10sec is one kind of popular switch module. You can use it control any devices on or off. This is a DC12V controlled 1 channel timer relay module. It has a NE555 timer chip on the board. You can adjust delay time(0-10s) by rotating the potentiometer. When this relay get powered it will delay several seconds before relay turn on. Note: recommended power + series with a diode to protect the circuit Features: The relay will delay to close after connecting with the power supply The time of delay can be adjusted from 0-10s With relay current protection function Increase of the potentiometer leads to time delay increase. Enlarging the capacitor leads to time delay increase. Specifications: 1 channel relay interface board Module Properties: NE555 chip Input Voltage: DC12V Adjustable Time: 0 – 10 sec Control Voltage: AC 0~250V/ max. 10A, DC 0-30V/max. 10A Max. Loading: 2200W Main Chip (NE555) Characteristics: Timing from microseconds to long hours .Simple circuit design Precision Pulse Generation / Timing, Adjustable Duty Cycle