BS1 relay timer

HODX

Need a circuit to power a pump, that draws 1.5amps and is 12v...I want to use a relay, unless there is another way to do it...also want to power the stamp from a 12v deep cycle battery.A little code to get me started would help...I want to turn on the pump for 1 minute then off for 5 minutes...Help please.......

Jon Williams

The code part is pretty easy:

{$STAMP BS1}

SYMBOL Pump = 0

SYMBOL secs = W1

Main:
· HIGH Pump
· secs = 60
· GOSUB Timer
· LOW Pump
· secs = 300
· GOSUB Timer
· GOTO Main

Timer:
· PAUSE 1000
· secs = secs - 1
· IF secs > 0 THEN Timer
· RETURN

The BS1 will take a 12v input and regulate it onlboard.· Just remember that you only have about 50 mA to power circuits, hence the transistor buffer for the relay (attached).· One note: DO NOT use the relay part number called out in the schematic -- it will only handle 0.5 amp.· Substitute an appropriate 12 v relay and you should be good to go.

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Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA

HODX

Thanks Jon