HardLabs

Keyboard

MaprilBear·Keebo·hw/KeyboardPCB/KeyboardPCB.kicad_pcb

Keyboard PCB layout, top view — open source Silicon Labs board by MaprilBear

About the Keyboard PCB

Keyboard is an open source Silicon Labs PCB design by MaprilBear, published on GitHub. It is a 2-layer board measuring 335 × 100 mm, with 164 components from 33 distinct parts.

Its main chip is the BGM220PC22HNA2R, from the Silicon Labs family. Other key parts include the TPS2113ADRBR, TM4C123GH6PMI7, TPS73633DBV and Adafruit ST7735R. By type, the board carries 65 diodes, 62 relays, 18 capacitors, 6 connectors, 6 resistors and 5 ICs.

It belongs with the keyboards, displays & leds and iot & wireless designs in this gallery.

From the project

USB and Bluetooth Keyboard with LCD and RGB

Main components on the Keyboard

TPS2113ADRBRBGM220PC22HNA2RTM4C123GH6PMI7TPS73633DBVAdafruit ST7735R

Keyboard bill of materials (BOM)

164 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TPS2113ADRBR
IC1
1
BGM220PC22HNA2R
IC2
1
TM4C123GH6PMI7
U1
1
TPS73633DBV
U2
1
Adafruit ST7735R
Adafruit
U3
1
16MHZ
16MHz
X2
1
USB_B_Micro
J1
1
CONN_01X07_PIN
Conn_01x07_Pin
J2
1
CONN_01X06_PIN
Conn_01x06_Pin
J3
1
CONN_02X05_ODD_EVEN
Conn_02x05_Odd_Even
J4
1
BATT_POS
J5
1
BATT_NEG
J6
46
KEYSW
K1, K2, K3, K4, K5, K6, K7, K8 +38
1
KEYSW
K14
3
KEYSW
K15, K28, K53
1
KEYSW
K29
2
KEYSW
K41, K42
8
KEYSW
K54, K55, K56, K57, K59, K60, K61, K62
1
KEYSW
K58
1
BAT_SWITCH
SW2
Show 13 more
QtyPartRefs
62
D
D1, D2, D3, D4, D5, D6, D7, D8 +54
3
LED
D9, D20, D71
3
1.0U
1.0u
C1, C12, C15
8
0.1U
0.1u
C2, C3, C4, C5, C13, C14, C17, C19
1
0.1UF
0.1uF
C6
1
4.7UF
4.7uF
C7
2
10P
10p
C8, C9
2
0.01U
0.01u
C10, C16
1
2.2U
2.2u
C11
1
10K
10k
R1
1
330
R2
3
1.1K
1.1k
R6, R9, R10
1
750
R7

Keyboard design files

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

Keyboard: common questions

What microcontroller does the Keyboard use?

The Keyboard is built around the BGM220PC22HNA2R, from the Silicon Labs family.

How big is the Keyboard PCB?

The Keyboard measures 335 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard?

164 components, from 33 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 Keyboard design files?

From the MaprilBear/Keebo 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 Keyboard design in my own project?

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

Can I test firmware for the Keyboard without the hardware?

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

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