2 layers20.3 × 69.7 mm PG attiny404, the printed circuit board in 3D

PG attiny404

3D-printable pinch valve for irrigation and sensor-driven liquid control.

Size: 20.3 × 69.7 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 41
Nets: 25
Pads: 103
Tracks, vias: 288, 64
Pours: 3
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 23 Nov 2025
Updated: 7 Nov 2026

Overview

PG attiny404 is an open-source printed circuit board by fabiansteiner, from the fabiansteiner/OpenValve repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 20.3 × 69.7 mm with 41 parts on 25 nets, routed with 288 tracks and 64 vias.

It is built around the ATTINY804-SSN, DRV8837DSGR-MS and ZXCT1009FTA, with the CC0805KRX7R7BB104, CL21B105KOFNNNE and ESDA041-1JY among its other parts. Its parts include 11 connectors, 8 resistors, 7 capacitors, 6 diodes and 4 ICs. It belongs with the sensors and measurement boards and the AVR (ATmega, ATtiny) boards of this library.

Main components

README

hardware/pcb/README.md

🛠️ Electronics

The PCB was designed using KiCad. OpenValve is based on the ATTINY804 microcontroller.

Schematic, PCB layout and BOM are all open.

Parts

Qty	Value	Footprint	References
8	Conn_01x01_Male	digikey-footprints:PROBE_PAD_1206	J2, J3, J4, J5, J6, J7, J8, J9
3	100nF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C3, C6, C7
3	1uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C2, C5
3	ESDA041-1JY	ESDA041-1JY:CR_041-1JY_STM	D4, D5, D6
1	0.5 Ohm	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R3
1	0022232041	SOT23:PinHeader_1x04_P2.54mm_Horizontal_spezial	J1
1	0ZCG0075FF2C	0ZCG0075FF2C:0ZCG0075FF2C	F1
1	100 Ohm	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R2
1	10k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R7
1	10uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C4
1	1M	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R6
1	220k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R8
1	2M	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R5
1	2N7002K-AU_R1_000A2	Package_TO_SOT_SMD:SOT-23_Handsoldering	Q1
1	62 Ohm	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1
1	665 Ohm	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R4
1	AP7370-33Y-13	Package_TO_SOT_SMD:SOT-89-3	U5
1	APTD3216QBC/D	LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder	D1
1	ATtiny804-SS	Package_SO:SOIC-14_3.9x8.7mm_P1.27mm	U1
1	Cap +	digikey-footprints:PROBE_PAD_0603	J10
1	Cap -	digikey-footprints:PROBE_PAD_0603	J11
1	DRV8837DSGR	DRV8837DSGR:DRV8837DSGR_NV	U2
1	PTS526 SM15 SMTR2 LFS	PTS526_SK15_SMTR2_LFS:PTS526SK15SMTR2 LFS-M	SW2
1	SMF13A	SMF13A:SMFSeries_LTF	D3
1	SSM3J338R_LF	SOT23:SOT-23F_TOS	MOSFET1
1	SW_Push	1825027-2:1825027-2	SW1
1	XZMDKVG55W-8	XZMDKVG55W-8:LED_XZMDKVG55W-8	D2
1	ZXCT1009F	ZXCT1009F:SOT-23_Handsoldering_ZXCT1009F	U4

Questions

How big is the PG attiny404 PCB?

It measures 20.3 × 69.7 mm and has 2 copper layers, 1.6 mm thick.

What parts does the PG attiny404 use?

41 parts, built around the ATTINY804-SSN, DRV8837DSGR-MS, ZXCT1009FTA and CC0805KRX7R7BB104. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the PG attiny404 KiCad files?

From the fabiansteiner/OpenValve repository on GitHub, at the commit this page was made from: the board is hardware/pcb/PG_attiny404.kicad_pcb and its schematic hardware/pcb/PG_attiny404.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the PG attiny404 design in my own project?

Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Category and platform

Sensors and measurement AVR (ATmega, ATtiny)

Topics

3d 3d-printing irrigation open-hardware soil-moisture-sensor open-hardware-electronics open-source watering watering-plants watering-system irrigation-system

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/fabiansteiner-openvalve" title="PG attiny404 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/fabiansteiner-openvalve.jpg" alt="PG attiny404" width="1200" height="900">

A picture that opens the board, for a README

[![PG attiny404](https://pcbkit.io/embed/boards/fabiansteiner-openvalve.jpg?size=s)](https://pcbkit.io/boards/fabiansteiner-openvalve)

Source

Repository: fabiansteiner/OpenValve
Board file: hardware/pcb/PG_attiny404.kicad_pcb
Commit: 1b9b6c2
Homepage: open-valve.com
Licence: CERN-OHL-S-2.0

Similar boards

4 layers73.7 × 45.7 mm
PMOD buffer
tkeller12/CMOD_S7_Pulse
CMOD S7 Pulse Programmer
46 parts1MIT
2 layers55.9 × 22.9 mm
Riotee SensorShield
NessieCircuits/Riotee_SensorShield
The Riotee Sensor Shield adds a microphone, an accelerometer and a temperature and humidty sensor to the Riotee Board.
24 parts1CERN-OHL-W-2.0
6 layers177.8 × 168.9 mm
LogicBoard smt
clydeshaffer/gametank
design files for the gametank hardware implementation
225 parts150
2 layers97.5 × 79 mm
RGB LED Driver
PCB-Design-MIT/Wi-Fi-Controlled-RGB-Light
A demo board for students to learn to solder and debug
144 parts4
2 layers100 × 100 mm
Integration elec slave
zarte13/PI4

117 parts
4 layers43.9 × 41 mm
Capteur
RubisCatty/Serre-Connecte
Projet final du programme de Génie Électrique par Sonia Michaud
43 parts
2 layers90.5 × 27.7 mm
GR Slide Pot Controller
GadgetReboot/PSM60_Fader_Controller
Motorized fader pot controller
44 parts9
2 layers58 × 42 mm
GR ATTiny LED
GadgetReboot/8ChLED
8 Addressable LEDs show logic input high/low states for easy probing
55 parts3