HardLabs

Melper

shannon-greenlight·Melper

Melper PCB layout, top view — open source board by shannon-greenlight
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About the Melper PCB

Melper is an open source PCB design by shannon-greenlight, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 160 × 60 mm, with 36 components from 27 distinct parts.

Other key parts include the C111887 and C5180. By type, the board carries 8 diodes, 8 capacitors, 7 connectors, 6 resistors, 3 inductors and 2 ICs.

It belongs with the audio designs in this gallery.

From the project

Converts Moog case into powered Eurorack

It requires +12V as an input and generates -12V and +5V. These 3 voltage rails supply 6 Eurorack power connectors. Three LEDs monitor the supply rails. It is targeted to Moog cases, but can be used in any case that has +12V. The 12 volt wall wart that Moog supplies works well.

This repo contains the schematic and layout files needed to create the Melper. These files are for KiCAD Version: 8.0.8

Main components on the Melper

C111887C5180

Melper bill of materials (BOM)

36 components, 27 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C111887
LM7805_TO220
U1
1
C5180
MC34063AD
U2
6
C305956
Conn_02x08_Odd_Even
J1, J2, J3, J4, J5, J6
1
C2905434
Conn_01x02
J7
1
small_logo
GR1
1
C238124
TestPoint
TP1
1
RED LED
D1
1
YELLOW LED
D2
1
GREEN LED
D3
1
C2286
Red SMT LED
D4
1
C895212
1N4001
D5
1
C110032
1N5819
D6
1
C72038
Yellow LED
D7
1
C2288
Blue SMT LED
D8
1
C7343084
100uH
L1
1
C17370623
1.8uH
L2
1
C96867
1.8uH
L3
2
C531341
10uF
C1, C7
2
C84772
.1uF
C2, C4
1
C2896045
330pF
C3
Show 7 more
QtyPartRefs
1
C43909
1000uF
C8
2
C45075
100uF
C9, C10
2
C57436
10K
R1, R3
1
C176521
4.7K
R2
1
C57435
953
R4
1
C172593
8.2K
R5
1
C119970
.33
R6

Melper design files

The KiCad project lives in the shannon-greenlight/Melper repository on GitHub; these links point at the commit this page was built from.

Melper: common questions

How big is the Melper PCB?

The Melper measures 160 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Melper?

36 components, from 27 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Melper design files?

From the shannon-greenlight/Melper repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Melper design in my own project?

Yes, under the terms of its GPL-3.0 license, which shannon-greenlight chose for the repository.

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