I am putting together a PiPhone but with slight mod to the power.
Is it possible to use powerboost 1000 charger to achieve the following?
- power up rpi + pitft and the sim module,
- recharge battery and/or power the devices directly when battery is low,
- terminate power output to all devices via the switch on powerboost charger
The rest of the wiring is known, except how to wire powerboost charger to the sim module.
The sim module receives power and charge its battery via the 5v micro usb port. The jst on the powerboost charger receives 3.7v for the battery. What is the simplest way to allow the sim module to receive stable 5v power output from the powerboost jst?
Wiring reference: adafruit piPhone
My powerboost differs from this wiring link. I need to implement a switch on the power booster. Also I want to connect vio to the TFT 3v instead of to FONA Bat+ so I could do a data failover. prelim wiring attempt