Incorporating a switch to prevent battery drain
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Please be positive and constructive with your questions and comments.
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- Posts: 9
- Joined: Wed May 16, 2012 8:12 am
Incorporating a switch to prevent battery drain
Is there a way to put a switch somewhere in the circuit to allow storage of 2 AA batteries inside MintyBoost to avoid any drain prior to use?
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Incorporating a switch to prevent battery drain
Yes. You can put a switch in-line with one of the battery leads.
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- Posts: 1
- Joined: Thu Aug 16, 2012 2:15 pm
Re: Incorporating a switch to prevent battery drain
Can I take this to mean that the kit does in fact drain batteries when not in use?
I would have thought the circuit would not be complete unless a device was connected?
I would have thought the circuit would not be complete unless a device was connected?
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Incorporating a switch to prevent battery drain
The boost IC itself has an idle current measured in microamps. But to satisfy the charging logic of iPhone and similar smart devices, we need to create a voltage on the D1 & D2 pins. The Minty does this with a resistor divider which results in a few more milliamps of idle current. If you are just using it as a dumb 5v supply, then you can leave off the resistors (R1-R4)and save yourself that extra current drain.
- jsquaredz
- Posts: 15
- Joined: Sun Mar 16, 2014 11:08 am
Re: Incorporating a switch to prevent battery drain
Here is an example of what I did. I used the small gap between the battery holder and the back of the minty tin to fit a small switch. Red sticker tells you which position is on.
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Incorporating a switch to prevent battery drain
Nice looking Minty build. Thanks for posting.
Please be positive and constructive with your questions and comments.