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TNbadge

eutectic6337·TNbadge·hardware/badge.kicad_pcb

TNbadge PCB layout, top view — open source ESP32 board by eutectic6337

About the TNbadge PCB

TNbadge is an open source ESP32 PCB design by eutectic6337, published on GitHub. It is a 2-layer board measuring 191.4 × 48.3 mm, with 32 components from 16 distinct parts.

Its main chip is the Seeed XIAO ESP32-C3, from the ESP32 family. Other key parts include the MH-ET_epaper_ 2.13, 5V boost converter and TXS0104EPWR. By type, the board carries 10 resistors, 7 capacitors, 6 diodes, 4 ICs, 3 switches and 1 connector.

It belongs with the displays & leds, wearables and power & battery designs in this gallery.

From the project

- manually reattached lanyard/stencil-alignment holes, battery box slots, an zero-size holes to net GND with direct connect (i.e. no thermal relief)

- manually reattached lanyard/stencil-alignment holes, battery box slots, an zero-size holes to net GND with direct connect (i.e. no thermal relief)

- manually reattached quarter-circle track around pin 2 of epaper display connector, top left, to net /GPIO1{SLASH}DC

- manually re-edited APA102 footprint to remove solder mask/stencil openings over (center) duplicate GND/5V pads

TNbadge, from the project README
From the project README

Main components on the TNbadge

Seeed XIAO ESP32-C3MH-ET_epaper_ 2.135V boost converterTXS0104EPWR

TNbadge bill of materials (BOM)

32 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Seeed XIAO ESP32-C3
U1
1
MH-ET_epaper_ 2.13
U2
1
5V boost converter
U3
1
TXS0104EPWR
U4
1
SAO V.1.69bis host
J1
1
Battery
BT1
1
power
SW1
1
SW_Push
SW2
1
update epaper
SW3
5
APA102
D1, D2, D3, D4, D5
1
LED
D6
7
1u
C1, C2, C3, C4, C5, C41, C42
6
10k
R1, R3, R4, R5, R7, R41
1
LDR07
R2
2
100k
R9, R10
1
100
R11

TNbadge design files

The KiCad project lives in the eutectic6337/TNbadge repository on GitHub; these links point at the commit this page was built from.

TNbadge: common questions

What microcontroller does the TNbadge use?

The TNbadge is built around the Seeed XIAO ESP32-C3, from the ESP32 family.

How big is the TNbadge PCB?

The TNbadge measures 191.4 × 48.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TNbadge?

32 components, from 16 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 TNbadge design files?

From the eutectic6337/TNbadge 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 TNbadge design in my own project?

The repository has no license, so all rights stay with eutectic6337. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the TNbadge without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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