10pcs DC 12V Delay Relay Shield NE555 Timer Switch Adjustable Module US Stock
Module based on : NE555 chip. Power relay delay pull. For example : a resistor capacitor 100uf 100K T = 1.1 x 100000 x 0.0001 = 11 seconds. With relay indicator. With freewheeling protection relay. 10 x Delay Relay Modules.