HardLabs

Keychain tris

darshg321·Keychain-tris·pcb/Keychain-tris.kicad_pcb

Keychain tris PCB layout, top view — open source ESP32 board by darshg321

About the Keychain tris PCB

Keychain tris is an open source ESP32 PCB design by darshg321, published on GitHub. It is a 2-layer board measuring 40.7 × 33.6 mm, with 39 components from 22 distinct parts.

Its main chip is the ESP32-C3, from the ESP32 family. Other key parts include the AMS1117-3.3 and MPU-6050. By type, the board carries 18 capacitors, 6 resistors, 5 connectors, 3 ICs, 3 inductors and 2 switches.

From the project

i made this project as a speedrun before the end of fallout for funsies. it is (hopefully) tetris on a keychain! how it will work is that you will be able to play tetris on the oled screen by moving the pcb around, and the imu will detect the movements. so for example, moving rig

i made this project as a speedrun before the end of fallout for funsies. it is (hopefully) tetris on a keychain! how it will work is that you will be able to play tetris on the oled screen by moving the pcb around, and the imu will detect the movements. so for example, moving right will move the pieces right, and moving it down will drop it. whats great about this control method is that theres 6 axis of motion so theres plenty to work with.

Keychain tris, from the project README
From the project README

Main components on the Keychain tris

ESP32-C3AMS1117-3.3MPU-6050

Keychain tris bill of materials (BOM)

39 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3
U1
1
AMS1117-3.3
U2
1
MPU-6050
MPU-6050_C24112
TDK InvenSense(应美盛)
U3
1
3225 40M 12PF 10PPM
SOSET(索斯特)
X1
1
CONN_01X02
Conn_01x02
J1
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J2
1
CONN_01X04
Conn_01x04
J3
2
CONN_01X08
Conn_01x08
J4, J5
1
2450AT18A100E
JOHANSON(约翰逊)
AE1
2
TS24CA
SHOU HAN(首韩)
SW1, SW2
1
BLM18KG601SN1D
muRata(村田)
L1
1
SDCL1005C2N7STDF
Sunlord(顺络)
L2
1
SDCL1608C3N9STDF
Sunlord(顺络)
L3
8
100NF
100nF
C1, C2, C5, C8, C9, C10, C15, C17
2
10UF
10uF
C3, C4
4
1UF
1uF
C6, C7, C13, C16
2
18PF
18pF
C11, C12
1
1PF
1pF
C14
1
2.2UF
2.2uF
C18
2
5.1K
R1, R2
Show 2 more
QtyPartRefs
3
10K
R3, R4, R5
1
50
R6

Keychain tris design files

The KiCad project lives in the darshg321/Keychain-tris repository on GitHub; these links point at the commit this page was built from.

Keychain tris: common questions

What microcontroller does the Keychain tris use?

The Keychain tris is built around the ESP32-C3, from the ESP32 family.

How big is the Keychain tris PCB?

The Keychain tris measures 40.7 × 33.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keychain tris?

39 components, from 22 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 Keychain tris design files?

From the darshg321/Keychain-tris 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 Keychain tris design in my own project?

The repository has no license, so all rights stay with darshg321. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Keychain tris 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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