Enable Pin on solar charger

Breakout boards, sensors, other Adafruit kits, etc.

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
roy_muzz
 
Posts: 7
Joined: Wed Oct 23, 2019 9:54 pm

Enable Pin on solar charger

Post by roy_muzz »

Hi,

I am solar powering a raspberry Pi using the bq24074 https://www.adafruit.com/product/4755

I have the problem with running out of power, and then the raspberry Pi not booting up again without triggering the run/reset Pins on the raspberry Pi. I have the KA75330 https://www.adafruit.com/product/4755

At this site: https://github.com/aschamberger/pcpLeo/ ... /README.md they used this technique but a little differently.

I have drawn and attached up how I would connect these up. Is this going to pull down the reset pin when the voltage drops below 3.3v and then pull it up when it goes over? Is there a batter way to integrate these so that the Rabperry Pi to deal with my problem. Ideally the power would be completely cut off/on when dropping under/over 3.3v, rather than just pulling the reset pin but I can't really see another way.

Thanks for your time.
Attachments
enable_pin_implementation.png
enable_pin_implementation.png (463.63 KiB) Viewed 73 times

User avatar
roy_muzz
 
Posts: 7
Joined: Wed Oct 23, 2019 9:54 pm

Re: Enable Pin on solar charger

Post by roy_muzz »

Is there an alternate design, where I use the enable pin on the KA75330 to triger a MOSFET to power up/down the Pi?

Locked
Please be positive and constructive with your questions and comments.

Return to “Other Products from Adafruit”