just got a pump.. a bit confused

Thread Starter

AXmichigan

Joined Jun 17, 2009
11
hey guys
so i just bought these pumps from china for this project i am working on
i found them initially because i opened a bp cuff and saw them in
(http://wwwe.koge.com/index_down.php?openCatIDfor3=1&openCatID=1&CAhs=defuse&firestpageset=1&ISPID=6&IIBig=1&sele=shopbig_dm_down&searchname=)

the pumps they sent are just with empty nodes to solder on which is fine
but i was wondering, because the pumps in the bp cuffs have a capacitor between the power & ground
why did they do that?
and what capacitor size should i use, does it matter?

i ask because the pump worked before, and now is seeming to be shorting my project when connected
is this part of the problem?

thanks!
 
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