HardLabs

Mf3dre

Zokhoi·mf3dre·PCB/re-mf3d.kicad_pcb

Mf3dre PCB layout, top view — open source AVR/Arduino board by Zokhoi

About the Mf3dre PCB

Mf3dre is an open source AVR/Arduino PCB design by Zokhoi, published on GitHub. It is a 2-layer board measuring 136 × 135 mm, with 135 components from 37 distinct parts.

Its main chip is the ATmega32U4-A, from the AVR/Arduino family. Other key parts include the TLC59461PWP, MC74HC165AD, MMA8453QR1, ZXCL330H5TA and ITG-3200. By type, the board carries 37 diodes, 28 switches, 27 capacitors, 25 resistors, 11 ICs and 3 connectors.

It belongs with the audio designs in this gallery.

From the project

Reverse engineered schematics and PCB design of DJTechTools Midi Fighter 3D

However, there are also some components that I am not very certain about, which I hope would be uncovered as time goes by. In specific, the list of items are: the model of the LEDs 4 white LEDs for bank buttons on top * 32 non-addressable RGB LEDs for arcade buttons

In an email exchange with DJTT, they have stated that the magnometer IST8308 has been replaced by accelerometer MMA8453Q, but both of these chips are present on my board. In addition, the circuitry around IST8308 (U11) does not seem to correspond to the application circuit given in its datasheet.

Mf3dre, from the project README
From the project README

Main components on the Mf3dre

TLC59461PWPMC74HC165ADMMA8453QR1ZXCL330H5TAATmega32U4-AITG-3200QFN-16_3x3mm_P0.5mm

Mf3dre bill of materials (BOM)

135 components, 37 distinct parts.

QtyPartRefs
3
TLC59461PWP
U1, U2, U3
3
MC74HC165AD
U4, U5, U6
1
MMA8453QR1
U7
1
ZXCL330H5TA
U8
1
ATmega32U4-A
U9
1
ITG-3200
U10
1
QFN-16_3x3mm_P0.5mm
U11
2
Q_NMOS_GSD
Q1, Q2
1
16MHz
X1
1
USB_B
J1
1
Conn_02x05_Odd_Even
P1
1
Conn_01x06_Female
P2
16
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +8
6
SW_Push
SW17, SW18, SW19, SW20, SW21, SW22
2
SW_Push
SW23, SW24
4
SW_Push
SW25, SW26, SW27, SW28
32
Raw_RGB_LED
D1, D2, D3, D4, D5, D6, D7, D8 +24
1
USBLC6-2SC6
D17
4
LED
D38, D39, D40, D41
1
10mH
L2
Show 17 more
QtyPartRefs
16
0.1uF
C1, C2, C3, C4, C5, C6, C8, C9 +8
1
10uF
C7
2
4.7uF
C13, C26
1
1uF
C14
1
2.2uF
C15
1
2.2nF
C17
1
10nF
C19
1
1uF
C21
2
22pF
C22, C23
1
100uF
C27
9
4.7k
R1, R8, R9, R16, R17, R22, R23, R24 +1
3
4.7k
R2, R3, R4
3
10k
R5, R6, R7
2
10k
R10, R13
2
R_Small
R11, R12
2
22
R14, R15
4
220
R18, R19, R20, R21

Mf3dre design files

The KiCad project lives in the Zokhoi/mf3dre repository on GitHub; these links point at the commit this page was built from.

Mf3dre: common questions

What microcontroller does the Mf3dre use?

The Mf3dre is built around the ATmega32U4-A, from the AVR/Arduino family.

How big is the Mf3dre PCB?

The Mf3dre measures 136 × 135 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mf3dre?

135 components, from 37 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mf3dre design files?

From the Zokhoi/mf3dre repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mf3dre design in my own project?

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

Can I test firmware for the Mf3dre 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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