HardLabs

Diymetro

tomarus·diymetro·kicad/diymetro/diymetro.kicad_pcb

Diymetro PCB layout, top view — open source AVR/Arduino board by tomarus
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About the Diymetro PCB

Diymetro is an open source AVR/Arduino PCB design by tomarus, published on GitHub. It is a 2-layer board measuring 162.8 × 100 mm, with 115 components from 26 distinct parts.

Its main chip is the ATmega328P-PU, from the AVR/Arduino family. Other key parts include the 74HC4051, 74LS595, TL072 and MCP4921-ESN. By type, the board carries 46 resistors, 13 capacitors, 10 switches, 9 connectors, 8 ICs and 8 diodes.

It belongs with the audio designs in this gallery.

From the project

DIY Metropolis Inspired Sequencer

An Intellijel Metropolis / Roland System-100 model 185 / Detroit Underground DU-SEQ clone using an Arduino Nano.

Don't use the kicad PCB, it's not working**

Diymetro, from the project README
From the project README

Main components on the Diymetro

74HC405174LS595ATmega328P-PUTL072MCP4921-ESN

Diymetro bill of materials (BOM)

115 components, 26 distinct parts.

QtyPartRefs
3
74HC4051
U1, U3, U4
1
74LS595
U2
1
ATmega328P-PU
U5
2
TL072
U6, U7
1
MCP4921-ESN
U8
2
MMBT2222A
Q1, Q2
1
Crystal
Y1
5
AudioJack2_SwitchT
J1, J2, J3, J4, J6
1
Conn_02x08_Top_Bottom
J5
1
ICSP
J7
1
SER
J8
1
OutputSelect
J9
18
R_POT
RV1, RV2, RV3, RV4, RV5, RV6, RV7, RV8 +10
8
SW_SPDT_MSM
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8
1
SW_Rotary12
SW9
1
SW_Push
SW10
8
LED
D4, D5, D6, D7, D8, D9, D10, D11
10
100n
C1, C2, C3, C4, C7, C8, C10, C11 +2
2
22p
C5, C6
1
100uF
C9
Show 6 more
QtyPartRefs
3
100
R1, R47, R48
3
10K
R3, R5, R45
2
100K
R4, R7
1
1M
R6
29
1K
R8, R9, R10, R11, R12, R13, R14, R15 +21
8
220
R24, R25, R26, R27, R28, R29, R30, R31

Diymetro design files

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

Diymetro: common questions

What microcontroller does the Diymetro use?

The Diymetro is built around the ATmega328P-PU, from the AVR/Arduino family.

How big is the Diymetro PCB?

The Diymetro measures 162.8 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Diymetro?

115 components, from 26 distinct parts. The full bill of materials is listed on this page.

Where can I download the Diymetro design files?

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

Can I use the Diymetro design in my own project?

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

Can I test firmware for the Diymetro 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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