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Keypad underglow

Fabian0520·keypad

Keypad underglow PCB layout, top view — open source AVR/Arduino board by Fabian0520

About the Keypad underglow PCB

Keypad underglow is an open source AVR/Arduino PCB design by Fabian0520, published on GitHub under the Custom license license. It is a 2-layer board measuring 78.5 × 116.3 mm, with 90 components from 21 distinct parts.

Its main chip is the ATMEGA32U4, from the AVR/Arduino family. Other key parts include the IS31FL3733-TQLS4. By type, the board carries 23 diodes, 19 relays, 19 LEDs, 16 capacitors, 8 resistors and 2 ICs.

Main components on the Keypad underglow

IS31FL3733-TQLS4ATMEGA32U4

Keypad underglow bill of materials (BOM)

90 components, 21 distinct parts.

QtyPartRefs
1
IS31FL3733-TQLS4
IC1
1
ATMEGA32U4
U1
1
XTAL_GND
X1
1
USB_mini_micro_B
J1
18
KEYSW
K1_1, K1_2, K1_3, K1_4, K2_1, K2_2, K2_3, K2_4 +10
1
KEYSW
K4_4
1
SW_PUSH
SW1
19
LED_RABG
D_LED_1, D_LED_2, D_LED_3, D_LED_4, D_LED_5, D_LED_6, D_LED_7, D_LED_8 +11
8
D_x2_KCom_AAK
D1, D2, D3, D4, D5, D6, D7, D8
3
D
D9, D10, D11
12
SK6805
D12, D13, D14, D15, D16, D17, D18, D19 +4
4
0.1u
C1, C2, C3, C4
1
4.7u
C5
3
C
C6, C7, C8
3
0.1uF
C9, C13, C15
1
C
C10
3
0.47uF
C11, C14, C16
1
22uF
C12
6
R
R1, R2, R3, R4, R5, R6
1
20k
R7
Show 1 more
QtyPartRefs
1
100k
R8

Keypad underglow design files

The KiCad project lives in the Fabian0520/keypad repository on GitHub; these links point at the commit this page was built from.

Keypad underglow: common questions

What microcontroller does the Keypad underglow use?

The Keypad underglow is built around the ATMEGA32U4, from the AVR/Arduino family.

How big is the Keypad underglow PCB?

The Keypad underglow measures 78.5 × 116.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keypad underglow?

90 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the Keypad underglow design files?

From the Fabian0520/keypad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Keypad underglow design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Keypad underglow without the hardware?

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

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