HardLabs

U pen

TheAbsoluteMin·u-pen·PCB/u-pen.kicad_pcb

U pen PCB layout, top view — open source board by TheAbsoluteMin

About the U pen PCB

U pen is an open source PCB design by TheAbsoluteMin, published on GitHub under the MIT license. It is a 4-layer board measuring 130.5 × 16.8 mm, with 24 components from 12 distinct parts.

Other key parts include the LSM6DSV16XTR, MAX17048G_T10 and USBLC6-2SC6. By type, the board carries 4 test points, 3 ICs, 2 switches and 1 connector.

It belongs with the iot & wireless, power & battery and sensors designs in this gallery.

From the project

A WiFi-enabled smart pen that records handwritten math equations and solves them.

Initially, uPen was named Insta-Form, and it would have served as an alternative for Photomath. With its own camera, it would have captured images of math problems during engineering work and then solve them instantly in order to provide a seamless experience when working with mathematical models, physics, or measurement calculations. Before, I would personally spend a lot of time writing out equations and models by hand or on a calculator. Now, uPen seeks to increase productivity and efficiency by bypassing the precious time required to find answers manually. As I have worked extensively on…

U pen, from the project README
From the project README

Main components on the U pen

LSM6DSV16XTRMAX17048G_T10USBLC6-2SC6

U pen bill of materials (BOM)

24 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LSM6DSV16XTR
U2
1
MAX17048G_T10
U3
1
USBLC6-2SC6
U4
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
4
C
C_0.1_1, C_0.1_2, C_0.1_3, C_0.1_4
2
C
C_10_5, C_10_6
1
C_Polarized
C_22_Tantalum_2
1
Conn_01x04_Pin
OLED_1
6
R_Small_US
R_2.2k_3, R_2.2k_4, R_5.1k_1, R_5.1k_2, R_10k_5, R_10k_6
1
SDS001R
S1
1
SW_SPDT
SW1
4
TestPoint
TP1_B+_1, TP1_P+_1, TP1_P-_2, TP1_RawBAT+_0

U pen design files

The KiCad project lives in the TheAbsoluteMin/u-pen repository on GitHub; these links point at the commit this page was built from.

U pen: common questions

How big is the U pen PCB?

The U pen measures 130.5 × 16.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the U pen?

24 components, from 12 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the U pen design files?

From the TheAbsoluteMin/u-pen repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the U pen design in my own project?

Yes, under the terms of its MIT license, which TheAbsoluteMin chose for the repository.

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