Intermittent Delay Start Relay Board, NE555

Description

• SPDT Songle relay 10A 250VAC or 30VDC, middle pin to one side ON, on side OFF, when active coil it switches verse vice.
• On Board NE555 IC delays the switch after power up, delay time 0 ~ 25 s.
• Delay time = T＝1.1RC. For example, capacitor 47uf and  trim pot potentiometer 500K T=1.1*500000*0.000047=25.85 seconds. (Max. )
• On board fixed capacitor 47UF on right side. Tune trim potentiometer can tune delay time.
• Operational voltage 5V for logic and relay.
• Relay keep switched after triggered until power off.
• On board two press button, top button to manual set to re-count the delay time, bottom button to manual set off the relay status.
• On board power diode to avoid wrong power connection.
• On board optical coupler, isolate relay signal.

Documentation please see on this page. 

Additional information