HardLabs

Lysergic25

Gtrx0·lysergic25

Lysergic25 PCB layout, top view — open source AVR/Arduino board by Gtrx0

About the Lysergic25 PCB

Lysergic25 is an open source AVR/Arduino PCB design by Gtrx0, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 99.1 × 99.1 mm, with 108 components from 20 distinct parts.

Its main chip is the Pro_Micro, from the AVR/Arduino family. Other key parts include the PRTR5V0U2X. By type, the board carries 30 resistors, 25 diodes, 9 capacitors, 8 LEDs, 2 ICs and 1 transistor.

It belongs with the keyboards designs in this gallery.

From the project

5x5 Macropad with MX, ALPS and CHOC switch compatibility

Lysergic25, from the project README
From the project README

Main components on the Lysergic25

Pro_MicroPRTR5V0U2X

Lysergic25 bill of materials (BOM)

108 components, 20 distinct parts.

QtyPartRefs
1
Pro_Micro
U1
1
PRTR5V0U2X
U2
1
Q_NPN_BCE
Q1
1
Breakout
J1
24
MX-1U
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +16
1
MX-1U
MX13
1
SW_PUSH
SW1
2
Audio-Jack-4
Trrs1, Trrs2
2
5.1K
UR4, UR5
1
1M
UR6
1
HRO-TYPE-C-31-M-12
USB1
8
WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8
25
D
D1, D2, D3, D4, D5, D6, D7, D8 +17
8
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8
1
4.7uF
C9
1
470
R1
1
1.5k
R2
2
2.2K
R3, R4
1
100k
R5
25
R
R6, R7, R8, R9, R10, R11, R12, R13 +17

Lysergic25 design files

The KiCad project lives in the Gtrx0/lysergic25 repository on GitHub; these links point at the commit this page was built from.

Lysergic25: common questions

What microcontroller does the Lysergic25 use?

The Lysergic25 is built around the Pro_Micro, from the AVR/Arduino family.

How big is the Lysergic25 PCB?

The Lysergic25 measures 99.1 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Lysergic25?

108 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Lysergic25 design files?

From the Gtrx0/lysergic25 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Lysergic25 design in my own project?

Yes, under the terms of its CERN-OHL-1.2 license, which Gtrx0 chose for the repository.

Can I test firmware for the Lysergic25 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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