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SO quantizer

sebastianbeyer·SO_quantizer

SO quantizer PCB layout, top view — open source AVR/Arduino board by sebastianbeyer

About the SO quantizer PCB

SO quantizer is an open source AVR/Arduino PCB design by sebastianbeyer, published on GitHub. It is a 2-layer board measuring 50 × 200 mm, with 114 components from 36 distinct parts.

Its main chip is the Arduino_Nano_v3.x, from the AVR/Arduino family. Other key parts include the TL074 and LP2951-5.0. By type, the board carries 52 resistors, 26 capacitors, 11 connectors, 8 diodes, 6 transistors and 3 ICs.

From the project

Strange Orbits Kosmo format quantizer

Kosmo format quantizer based largely on the kassutronics quantizer. I went for a different interface though, where you select the scale via potentiometer and with the second potentiometer (and cv input) you can bias the incoming voltages and therefore 'transpose in scale'. It still lacks a few scales.

SO quantizer, from the project README
From the project README

Main components on the SO quantizer

TL074LP2951-5.0Arduino_Nano_v3.x

SO quantizer bill of materials (BOM)

114 components, 36 distinct parts.

QtyPartRefs
2
TL074
U1, U2
1
LP2951-5.0
U3
1
Arduino_Nano_v3.x
A1
6
2N3904
Q1, Q2, Q3, Q4, Q5, Q6
1
cv_in_a
J1
1
cv_out_a
J2
1
cv_in_a_aux
J3
1
cv_out_b
J4
1
Conn_01x08_Male
J5
1
Conn_01x08_Female
J6
1
cv_in_b_aux
J7
1
cv_in_b
J8
1
Conn_01x06_Male
J9
1
Conn_01x06_Female
J10
1
Synth_power_2x5
J11
2
SolderJumper_2_Open
JP1, JP2
2
10k
RV1, RV2
2
10k
RV3, RV4
1
5k
RV5
6
LED_red
D1, D2, D3, D4, D5, D6
Show 16 more
QtyPartRefs
2
1N5817
D7, D8
4
470p
C1, C8, C15, C17
4
47p
C2, C9, C16, C18
4
220p
C3, C4, C10, C11
6
1n
C5, C6, C7, C12, C13, C14
4
100n
C19, C20, C25, C26
3
10u
C21, C23, C24
1
22n
C22
12
*10k
R1, R4, R13, R14, R15, R18, R27, R28 +4
4
10k
R2, R16, R30, R41
14
100k
R3, R9, R17, R19, R31, R33, R42, R44 +6
5
15k
R5, R7, R20, R22, R52
4
68k
R6, R8, R21, R23
10
1k
R10, R12, R24, R26, R34, R35, R36, R37 +2
2
1M
R11, R25
1
47k
R51

SO quantizer design files

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

SO quantizer: common questions

What microcontroller does the SO quantizer use?

The SO quantizer is built around the Arduino_Nano_v3.x, from the AVR/Arduino family.

How big is the SO quantizer PCB?

The SO quantizer measures 50 × 200 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SO quantizer?

114 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the SO quantizer design files?

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

Can I use the SO quantizer design in my own project?

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

Can I test firmware for the SO quantizer 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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