Can I connect my battery to the 3V3 pin?
Absolutely not! The 3V3 pin bypasses the onboard 3V3 LDO regulator, and if you connect a battery that can be as...
Power
Help specific to powering your Unexpected Maker boards
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Can I connect my battery to the 5V pin?
Short answer? No. The 5V pin is for an external 5V supply input to the 5V power rail. The 5V rail... -
Can I power my board from the 3V3 pin?
All Unexpected Maker boards have a 3V3 pin on the header, that works as either an Input or Output, depending... -
Devices powered from the 2nd LDO power down when the ESP32 goes into deep sleep
That’s correct! LDO 2 is tied to both a user controllable IO and VDD for the Flash/PSRAM, so when the... -
How do I read the battery voltage?
Each of the boards has an IO connected to a voltage divider on the battery to be able to read... -
How fast will my battery charge?
The battery charge rate on all Unexpected Maker boards is set to 330mA based on the 3K3 charge resistor used.... -
How many Amps can I pull through the USB to the 5V pin?
The short answer is 500mA sustained. You can pull up to 1A for short periods of time, but for prolonged... -
I’ve set my RGB LED to black/clear and it’s still drawing current?
All RGB LEDs have a quiescent current of between 500uA and 1mA, so even setting them to display nothing still... -
Powering your board from battery
All Unexpected Maker development boards come with support for using a Lithium Polymer battery to power your projects as well... -
Sometimes my battery doesn’t start charging when I plug it in
If you have 5V power connected to your board before you plug your battery in, sometimes it might no start... -
The ORANGE charge LED blinks when no battery is connected
That is the correct behaviour! The charge IC can’t tell the difference between a full battery and no battery, so... -
The RED power LED doesn’t light up when running off battery
That is by design! The power and charge LEDs and corresponding resistors drain the battery, so they’ve been isolated to... -
What voltage range can the 5V pin accept and is it an input and output?
The 5V pin on your board is an in and out pin. As an input, it will accept a voltage... -
Why don’t I get 5V output on the 5V pin when running off battery?
The 5V pin can only produce 5V if there is a 5V source connected to the board via the USB...