HardLabs

Picowater

locked·picowater·hw/picowater.kicad_pcb

Picowater PCB layout, top view — open source RP2040/RP2350 board by locked

About the Picowater PCB

Picowater is an open source RP2040/RP2350 PCB design by locked, published on GitHub. It is a 2-layer board measuring 98 × 56 mm, with 50 components from 38 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the SN74HC74N, PCF8563T, TLP160G and MCP9808_MSOP. By type, the board carries 14 resistors, 9 capacitors, 8 connectors, 5 ICs, 3 diodes and 2 transistors.

From the project

cmake -DPICOBOARD=picow -DWIFISSID="" -DWIFIPASSWORD="" -DSERVERIP="" -DSERVERPORT= ..

cmake -DPICOBOARD=picow -DWIFISSID="" -DWIFIPASSWORD="" -DSERVERIP="" -DSERVERPORT= ..

https://github.com/iiot2k/pico-lib2/blob/main/src/dev/devds3231/devds3231.c

https://ghubcoder.github.io/posts/awaking-the-pico/

https://github.com/ghubcoder/PicoSleepRtc/blob/master/ds3232rtc.cpp

https://github.com/raspberrypi/pico-examples/blob/master/adc/helloadc/helloadc.c

Main components on the Picowater

PicoSN74HC74NPCF8563TTLP160GMCP9808_MSOP

Picowater bill of materials (BOM)

50 components, 38 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Pico
U1
1
SN74HC74N
Texas Instruments
U2
1
PCF8563T
U3
1
TLP160G
MAX77596
U5
1
MCP9808_MSOP
U6
2
BC817
Q2, Q3
1
Crystal
Y1
1
+12V
J1
1
Power In
J2
1
UART
J4
1
GPIO2
J7
1
SCREEN
J8
3
RJ45
J13, J14, J15
1
3V Cell
BT2
4
MountingHole
H1, H2, H3, H4
1
Jmp_CLKOUT
JP2
1
G5Q-14-DC5
K1
1
C169527
1A 20V Schottky
D1
1
1N4007
D3
1
LED
D4
Show 18 more
QtyPartRefs
1
10uH
L1
2
100NF
100nF
C1, C3
1
22PF
22pF
C2
1
10U
22u
C4
1
10U
10u
C5
1
10uF
C6
1
1u
C7
2
0.1u
C8, C9
2
100K
R1, R4
1
34K
R2
1
220
4.7K
R3
3
10K
R5, R6, R8
1
10K
R7
1
220
200K
R9
1
100
220
R10
2
4K7
R11, R12
1
220
R13
1
900K
R14

Picowater design files

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

Picowater: common questions

What microcontroller does the Picowater use?

The Picowater is built around the Pico, from the RP2040/RP2350 family.

How big is the Picowater PCB?

The Picowater measures 98 × 56 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Picowater?

50 components, from 38 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 Picowater design files?

From the locked/picowater 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 Picowater design in my own project?

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

Can I test firmware for the Picowater 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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