+7.4V to power Hall and optical sensors?

Thread Starter


Joined Jan 4, 2022

Apologies for the slightly dumb question, or posting in the wrong place if this is more appropriate to the sensors forum, but…

I’m working on a simple project that will use both a Hall sensor and an optical sensor – probably these specific bits, https://www.ebay.co.uk/itm/111961114452 and https://www.ebay.co.uk/itm/282992625948

My question is: can I safely drive either or both of these with the +7.4V that a LiPo battery pack will supply rather than the +5V that is specified (or more likely, the +3.3V that will be powering an Arduino-ish board)?


Joined Aug 21, 2008
The optical sensor is anybody's guess whether it would word with more than the +5V specified but the Hall sensor specifies 3.3 to 5.0V, and not knowing anything more about it I would say your best bet is to use a low cost linear regulator to drop the 7.4V down to 5.0V and drive them both from the same regulator. If current is a problem you can find a low current regulator like the MCP1702-3302E/TO .