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Poly555

oskitone·poly555·kicad/poly_555.kicad_pcb

Poly555 PCB layout, top view — open source board by oskitone
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About the Poly555 PCB

Poly555 is an open source PCB design by oskitone, published on GitHub under the Custom license license. It is a 2-layer board measuring 184 × 114.8 mm, with 248 components from 29 distinct parts.

Other key parts include the 555, L7805, LM386 and LM556. By type, the board carries 85 resistors, 67 capacitors, 23 ICs, 22 switches, 22 diodes and 2 battery holders.

It belongs with the audio designs in this gallery.

From the project

The POLY555 is a polyphonic, analog, square wave synth based on the 555 timer chip.

The POLY555 is a polyphonic, analog, square wave synth based on the 555 timer chip.

Demo: https://vimeo.com/487720782 Purchase a kit: https://www.oskitone.com/product/poly555-synth-diy-kit Assembly Guide: https://oskitone.github.io/poly555/ Blog post: https://blog.tommy.sh/posts/poly555-synth/

1. The kicad project for the PCB 2. The openscad code for generating the models for 3D-printing 3. The assembly_guide code for, you guessed it, generating the Assembly Guide

Poly555, from the project README
From the project README

Main components on the Poly555

555L7805LM386LM556

Poly555 bill of materials (BOM)

248 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
20
555
U1, U2, U3, U4, U5, U6, U7, U8 +12
1
L7805
U21
1
LM386
U22
1
LM556
U101
2
9v
BT1, BT101
1
Speaker
LS1
1
Speaker
LS101
22
1k
RV1, RV2, RV3, RV4, RV5, RV6, RV7, RV8 +14
2
1M
RV101, RV102
20
FSM4JSMATR
S1, S2, S3, S4, S5, S6, S7, S8 +12
2
EG1218
S21, S101
1
VAL**
mouse-bite-2.54mm-slot
22
LED
D1, D2, D3, D4, D5, D6, D7, D8 +14
22
.1uF
C1, C4, C7, C10, C13, C16, C19, C22 +14
20
4.7uF
C2, C5, C8, C11, C14, C17, C20, C23 +12
20
10nF
C3, C6, C9, C12, C15, C18, C21, C24 +12
1
.22uF
C61
1
47nF
C63
1
220uF
C64
1
.01uF
C101
Show 9 more
QtyPartRefs
1
10uF
C103
21
220
R1, R5, R9, R13, R17, R21, R25, R29 +13
20
100k
R2, R6, R10, R14, R18, R22, R26, R30 +12
20
100
R3, R7, R11, R15, R19, R23, R27, R31 +12
20
10k
R4, R8, R12, R16, R20, R24, R28, R32 +12
1
100
R82
1
10
R83
1
330
R101
1
1k
R102

Poly555 design files

The KiCad project lives in the oskitone/poly555 repository on GitHub; these links point at the commit this page was built from.

Poly555: common questions

How big is the Poly555 PCB?

The Poly555 measures 184 × 114.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Poly555?

248 components, from 29 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 Poly555 design files?

From the oskitone/poly555 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Poly555 design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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