HardLabs

RNG Back

QuinnFreedman·modular·modules/RNG/PCBs/rng_pcb_back/rng_pcb_back.kicad_pcb

RNG Back PCB layout, top view — open source AVR/Arduino board by QuinnFreedman

About the RNG Back PCB

RNG Back is an open source AVR/Arduino PCB design by QuinnFreedman, published on GitHub. It is a 2-layer board measuring 50 × 100 mm, with 34 components from 18 distinct parts.

Its main chip is the Arduino Nano v3, from the AVR/Arduino family. Other key parts include the TLC5940NT, MCP4922, MCP6004, TL072 and LM4040BIZ-5. By type, the board carries 12 resistors, 10 capacitors, 6 ICs, 5 connectors and 1 module.

It belongs with the audio designs in this gallery.

From the project

A collection of free & open source DIY synthesizer module designs for Eurorack

RNG Back, from the project README
From the project README

Main components on the RNG Back

TLC5940NTMCP4922MCP6004TL072LM4040BIZ-5TLC5940PWPArduino Nano v3

RNG Back bill of materials (BOM)

34 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TLC5940NT
U1
1
MCP4922
U2
1
MCP6004
U3
1
TL072
U4
1
LM4040BIZ-5
U5
1
TLC5940PWP
U6
1
Arduino Nano v3
A1
1
Conn_01x07_Socket
J1
1
Conn_02x03_Socket
J8
1
Conn_01x06_Socket
J9
1
Conn_01x08_Socket
J10
1
Eurorack_2x8_Power
J11
7
100nF
C1, C2, C3, C4, C5, C9, C10
3
10uF
C6, C7, C8
6
100kΩ
R9, R10, R11, R14, R15, R21
3
50kΩ
R12, R13, R16
1
1kΩ
R17
2
15kΩ
R18, R19

RNG Back design files

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

RNG Back: common questions

What microcontroller does the RNG Back use?

The RNG Back is built around the Arduino Nano v3, from the AVR/Arduino family.

How big is the RNG Back PCB?

The RNG Back measures 50 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RNG Back?

34 components, from 18 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 RNG Back design files?

From the QuinnFreedman/modular 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 RNG Back design in my own project?

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

Can I test firmware for the RNG Back 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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