P0T4T0 V1 — USB-C Battery Charger & 5 V / 3.3 V Power Module
Your project has a microcontroller, a display, and a suspicious number of jumper wires. Give the power department its own board.
P0T4T0 V1 from Midwest Gadgets combines USB-C power input, single-cell lithium battery charging, and separate nominal 5 V and 3.3 V outputs. It is built for the portable gadgets and bench projects that have officially outgrown “I’ll just tape a battery to it.”
Connect a compatible rechargeable battery and a 5 V USB supply. The onboard power-path circuit supports running your project while charging, with available input power shared between the load and battery. One slide switch controls both output rails, while charging remains enabled with the outputs switched off.
5 V USB-C power input with Type-C current detection.
Single-cell Li-ion/LiPo charging, configured for approximately 0.49 A and a 4.208 V nominal charge-voltage setting.
Two regulated output rails: nominal 3.3 V and 5 V, with the 5 V circuit set to approximately 4.95 V.
Dedicated output wire pads for connecting your project.
Charge-status and USB power-status LEDs.
Low-voltage output cutoff and onboard battery-protection circuitry.
Reverse Polarity Protection
A suitable 1,000 mAh, 3.6/3.7 V nominal Li-ion or LiPo battery can be used when its specifications permit approximately 0.5 A charging and your project’s discharge load. Confirm connector fit and polarity. Use only cells intended for 4.2 V charging.
USB-C is for power input only; USB data and USB-PD fast charging are not supported. Output capability depends on the source, battery, connection, combined load, and temperature. The battery connector is specified in the design for 1 A; that is battery-side current, not a 1 A rating for each output. Charge current can decrease under load. Temperature sensing is on the board, not directly on the battery.
P0T4T0 V1. More useful than an actual potato. Considerably less suitable for the air fryer.
