View Single Post
  #1  
Old 29-06-2017, 03:07 PM
Star Hunter
Registered User

Star Hunter is offline
 
Join Date: Dec 2011
Location: Ellesmere, Qld
Posts: 184
Wanting to make 5 V USB lens warmers

Does any one know what type and how many, resistors are needed to make some 5 volt USB lens warmers?

I'll run them in parallel and wire them up to USB plugs. Just need to know what resistors to to use and how many. The warmers will run off either a 12v 26A/Hr battery with the USB plugs or from a 5V Li-On battery.
Thanks,
Jim
Reply With Quote