HardLabs

Mmm

martamusikmaschine·mmm·pcb/marta.kicad_pcb

Mmm PCB layout, top view — open source Raspberry Pi board by martamusikmaschine

About the Mmm PCB

Mmm is an open source Raspberry Pi PCB design by martamusikmaschine, published on GitHub. It is a 2-layer board measuring 66.5 × 70.8 mm, with 29 components from 28 distinct parts.

Its main chip is the RaspberryPiZeroW, from the Raspberry Pi family. Other key parts include the MPU6050 Gyro + Accelerometer, PCM5102 Audio Stereo DAC, PAM8406 Audio Amplifier, RDM6300 RFID Reader and OnOffShim. By type, the board carries 9 ICs, 6 connectors, 6 switches, 4 resistors, 2 speakers and 1 antenna.

It belongs with the audio and sensors designs in this gallery.

From the project

Marta Musik Maschine - DIY, RFID enabled, multi-purpose, audio and light device for kids

Marta Musik Maschine is a DIY, RFID enabled, multi-purpose, audio and light device for kids. It's open source and you can build one yourself. It's not hard at all, I promise.

This repository contains all the code needed on the Raspberry Pi, a KiCad project that enables you to etch/order a PCB and a few stl models that you can print on a 3D printer.

Main components on the Mmm

MPU6050 Gyro + AccelerometerRaspberryPiZeroWPCM5102 Audio Stereo DACPAM8406 Audio AmplifierRDM6300 RFID ReaderOnOffShimTCRT5000 IR Sensor74HCT245 Level ShifterWS2812B

Mmm bill of materials (BOM)

29 components, 28 distinct parts.

QtyPartRefs
1
MPU6050 Gyro + Accelerometer
IC1
1
RaspberryPiZeroW
IC2
1
PCM5102 Audio Stereo DAC
IC3
1
PAM8406 Audio Amplifier
IC4
1
RDM6300 RFID Reader
IC5
1
OnOffShim
U1
1
TCRT5000 IR Sensor
U2
1
74HCT245 Level Shifter
U3
1
WS2812B
U4
2
Conn_01x08
J1, J2
1
Conn_02x04_Odd_Even
J3
1
GND
J4
1
+3.3V
J5
1
+5V
J6
1
RFID Antenna
AE1
1
Right Speaker
LS1
1
Left Speaker
LS2
1
Reset Button
SW1
1
ON/OFF Button
SW2
1
GPIO 5
SW3
Show 8 more
QtyPartRefs
1
GPIO 6
SW4
1
GPIO 13
SW5
1
GPIO 26
SW6
1
Power LED
D1
1
2a
R1
1
a
R2
1
220R
R3
1
R
R4

Mmm design files

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

Mmm: common questions

What microcontroller does the Mmm use?

The Mmm is built around the RaspberryPiZeroW, from the Raspberry Pi family.

How big is the Mmm PCB?

The Mmm measures 66.5 × 70.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mmm?

29 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mmm design files?

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

Can I use the Mmm design in my own project?

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

Can I test firmware for the Mmm without the hardware?

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

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