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Pico dco

polykit·pico-dco·kicad/pico-dco.kicad_pcb

Pico dco PCB layout, top view — open source RP2040/RP2350 board by polykit
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About the Pico dco PCB

Pico dco is an open source RP2040/RP2350 PCB design by polykit, published on GitHub. It is a 2-layer board measuring 100 × 165 mm, with 148 components from 26 distinct parts.

Its main chip is the Raspberry Pi Pico, from the RP2040/RP2350 family. Other key parts include the L7805, TL074 and H11L1. By type, the board carries 87 resistors, 35 capacitors, 9 ICs, 6 transistors, 2 inductors and 1 module.

It belongs with the audio designs in this gallery.

From the project

Polyphonic Digitally Controlled Oscillator (DCO) controlled by Raspberry Pi Pico PIO

This repository contains source code, schematics and PCB for a digitally controlled oscillator (DCO) with up to 6 voices which are driven by a Raspberry Pi Pico. It uses PIO to generate a highly accurate frequency which is controlled by USB or serial MIDI. The analog oscillator part is based on the Juno 106 and generates sawtooth and square wave signal with a 10Vpp amplitude. Amplitude compensation is done by a smoothed PWM signal coming from the Pico.

Pico dco, from the project README
From the project README

Main components on the Pico dco

Raspberry Pi PicoL7805TL074H11L1

Pico dco bill of materials (BOM)

148 components, 26 distinct parts.

QtyPartRefs
1
Raspberry Pi Pico
MCU1
1
L7805
U1
6
TL074
U2, U4, U5, U6, U7, U8
1
H11L1
U3
1
Conn_01x10
MOD1
6
2N3904
Q1, Q2, Q3, Q4, Q5, Q6
3
Conn_02x08_Odd_Even
GATE1, PULSE1, RAMP1
2
Conn_01x02
MIDI_IN1, PWM_IN1
1
Conn_02x05_Odd_Even
POWER1
1
20k
PW_POT1
1
1N4148
D1
2
Ferrite_Bead
FB1, FB2
14
100n
C1, C5, C7, C10, C11, C15, C16, C20 +6
6
470p
C2, C12, C17, C22, C27, C32
6
1n*
C3, C13, C18, C23, C28, C33
8
10u
C4, C8, C9, C14, C19, C24, C29, C34
1
330n
C6
6
4k7
R1, R18, R32, R46, R60, R74
30
100k
R2, R3, R6, R9, R13, R19, R20, R22 +22
19
10k
R4, R5, R12, R14, R21, R28, R30, R35 +11
Show 6 more
QtyPartRefs
7
1k
R7, R17, R23, R37, R51, R65, R79
6
150k
R8, R24, R38, R52, R66, R80
6
470k
R10, R26, R40, R54, R68, R82
6
2k2
R11, R27, R41, R55, R69, R83
6
5k6
R15, R31, R45, R59, R73, R87
1
220
R16

Pico dco design files

The KiCad project lives in the polykit/pico-dco repository on GitHub; these links point at the commit this page was built from.

Pico dco: common questions

What microcontroller does the Pico dco use?

The Pico dco is built around the Raspberry Pi Pico, from the RP2040/RP2350 family.

How big is the Pico dco PCB?

The Pico dco measures 100 × 165 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pico dco?

148 components, from 26 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pico dco design files?

From the polykit/pico-dco repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Pico dco design in my own project?

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

Can I test firmware for the Pico dco without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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