I came across this:
There are many 3-5v water pumps and float switches found for dirt cheap. Looking at the pump in the link above and knowing most float switches are low voltage dc, can it work? Just splice the wire inline, no relay needed.
Example pump (4.5v, .18a, .91w):
Example float switch (Max Contact 10W, Max Carry Current 1.0A):
I know it's all cheap Chinese made, but 5 diy pumps for 20$... Compared to the 65$ for 1.. Always nice to have backups.. especially with cheap stuff..
ADA VUPPA II pump (Float switch included)
*This item is qualified for FREE SHIPPING to all 48 continental states! Additional shipping fees may apply for shipping to Puerto Rico, Hawaii, and Alaska. This is the genuine ADA replacement pump (with Float switch included) for the Vuppa-II. *The USB Power Adapter 5V/1A (Type A plug) is NOT...
aquaforestaquarium.com
There are many 3-5v water pumps and float switches found for dirt cheap. Looking at the pump in the link above and knowing most float switches are low voltage dc, can it work? Just splice the wire inline, no relay needed.
Example pump (4.5v, .18a, .91w):
Example float switch (Max Contact 10W, Max Carry Current 1.0A):
I know it's all cheap Chinese made, but 5 diy pumps for 20$... Compared to the 65$ for 1.. Always nice to have backups.. especially with cheap stuff..