HardLabs

MyGenWashy

mayermakes·MyGenWashy·mr_washi/mr_washi.kicad_pcb

MyGenWashy PCB layout, top view — open source AVR/Arduino board by mayermakes

About the MyGenWashy PCB

MyGenWashy is an open source AVR/Arduino PCB design by mayermakes, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 147.8 × 106.3 mm, with 54 components from 44 distinct parts.

Its main chip is the ATtiny3226-S, from the AVR/Arduino family. Other key parts include the ULN2003, MOC3020M, PC817 and MCP1825S. By type, the board carries 16 connectors, 9 relays, 9 capacitors, 7 resistors, 6 ICs and 3 diodes.

From the project

Generic washing Machine Controller - Result of the TuttleButtle Hackathon 2025

the team got a broken washing machine and set the task to create a generic open source washing machine controler. the original washing machine and its electronics and a chinese replacement board were partly reverse engineered to understand the functionality. the team tested their theories on how safety mechanisms and machine parts worked and had to be controlled. At the end of day two the machine was running a cold wash programm from a dev kit and some homemade electronics controlled via ESP-home. On day three the learnings and circuits were converted into a kicad design for further testing…

MyGenWashy, from the project README
From the project README

Main components on the MyGenWashy

ATtiny3226-SULN2003MOC3020MPC817MCP1825S

MyGenWashy bill of materials (BOM)

54 components, 44 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATtiny3226-S
U1
1
ULN2003
U2
1
MOC3020M
U3
2
PC817
U4, U5
1
MCP1825S
U6
1
BTB16-600B
Q1
1
PRG_01x03_Pin
J1
1
DRAIN PUMP
J2
1
HEATER
J3
1
WATER INLET 1
J4
1
WATER INLET 2
J5
1
LOW_LEVEL
J6
1
HIGH_LEVEL
J7
1
DOOR LOCK
J8
1
DOOR_INTERLOCK
J9
1
STATOR
J10
1
ROTOR
J11
1
TACHO
J12
1
Conn_01x05_Socket
J13
1
Conn_01x02_Socket
J15
Show 24 more
QtyPartRefs
1
230V_IN
J16
1
NTC 5k
J17
1
100mA
F1
1
Fuse
F2
6
RZ03-1C4-D005
K1, K2, K3, K4, K5, K8
3
RTD14730
K6, K7, K9
1
IRM-10-5
PS1
1
LED
D1
1
D
D2
1
1.5KExxCA
D5
1
10uF
C1
1
0,1uF
C2
1
400V 100nF
C3
1
400V 10nF
C4
1
330uF
C5
1
10uF
C6
1
0,1uF
C7
2
10uF
C8, C9
1
1k
R1
1
330
R2
1
100
R3
1
10k
R4
2
47k
R5, R6
1
5k
R7

MyGenWashy design files

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

MyGenWashy: common questions

What microcontroller does the MyGenWashy use?

The MyGenWashy is built around the ATtiny3226-S, from the AVR/Arduino family.

How big is the MyGenWashy PCB?

The MyGenWashy measures 147.8 × 106.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MyGenWashy?

54 components, from 44 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 MyGenWashy design files?

From the mayermakes/MyGenWashy 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 MyGenWashy design in my own project?

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

Can I test firmware for the MyGenWashy 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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