+7.4V to power Hall and optical sensors?

Thread Starter

zogster

Joined Jan 4, 2022
1
Hi,

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)?
 

DickCappels

Joined Aug 21, 2008
8,686
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 .
 
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