Variable Timer Relay using Arduino

NE555 DC 12V 0~60 S Delay Timer Switch Adjustable Time Relay Module – diymore

Guide for Relay Module with Arduino

DC 12V Delay relay shield NE555 Timer Switch Adjustable Module 0 to 10 Second

Arduino Variable Timer Relay

5V-30V Delay Relay Timer Module Trigger Delay Switch Micro USB Power A – Sunhokey Electronics Co., Ltd

DC 12V/24V 80A Timer Module Adjustable Timer Delay Turn Off Timing Relay Switch 0~100 sec 0-5Min With Potentiometer for Arduino - AliExpress

Time Delay Relay circuit using 555 timer IC - Electronics Projects

12V Delay Adjustable relay shield NE555 Timer Switch Module – diymore

Adjustable time Delay Turn on Switch Ne555 Timer Control Relay 10A Module Board

6-30V Relay Module Switch Trigger Time Delay Circuit Timer Cycle Adjustable Trigger OFF / ON Switch