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Model T REXCPM UPS 100 v011

author: KI5NYZ
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2 layer board of 2.02 x 0.72 inches (51.3 x 18.3 mm)
Uploaded: December 27, 2024
Shared: December 27, 2024
Total Price: $7.25

View project on Github

Assembly notes:

For battery holders BT1, BT2, BT3 (NOT BT4!) break the rear walls off before soldering, so that a battery can pass all the way through the holder. Flush-cut everything on the top side as close as possible, and re-flow the cut posts to smooth them into domes. Optionally solder 2 short bits of wire from the two exposed vias to the rear walls of BT4 to mechanically strengthen those walls. Solder a 25mm piece of 0.6mm solid core insulated wire to the GND side of the big yellow capacitor on the REXCPM.

Qwiic adapter wire connections:

BLACK -> new GND pin on the large yellow cap

RED -> pin closest to the cap

BLUE -> center pin

YELLOW -> pin furthest away from the cap

Assembly notes:

For battery holders BT1, BT2, BT3 (NOT BT4!) break the rear walls off before soldering, so that a battery can pass all the way through the holder. Flush-cut everything on the top side as close as possible, and re-flow the cut posts to smooth them into domes. Optionally solder 2 short bits of wire from the two exposed vias to the rear walls of BT4 to mechanically strengthen those walls. Solder a 25mm piece of 0.6mm solid core insulated wire to the GND side of the big yellow capacitor on the REXCPM.

Qwiic adapter wire connections:

BLACK -> new GND pin on the large yellow cap

RED -> pin closest to the cap

BLUE -> center pin

YELLOW -> pin furthest away from the cap

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      Hey there! Before ordering, make sure you have all the info you need to complete and use this design. This usually means a component list, and sometimes additional information such as assembly notes, source code, or usage guides.
      Since this is a project designed by a community member, it may contain design errors that prevent it from working as intended. OSH Park cannot place any guarantees about the functionality or correctness of the design.
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