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Picoclock

locked·picoclock·pcb/picoclock.kicad_pcb

Picoclock PCB layout, top view — open source RP2040/RP2350 board by locked
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About the Picoclock PCB

Picoclock is an open source RP2040/RP2350 PCB design by locked, published on GitHub. It is a 2-layer board measuring 175.8 × 64 mm, with 86 components from 47 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the PCF8563T, MCP9808_MSOP, PCM5100, PAM8302A and MCP23009-SO. By type, the board carries 28 capacitors, 18 resistors, 14 connectors, 7 ICs, 6 switches and 4 diodes.

From the project

This repo is an attempt at building a Pico based alarm clock. It was created for my kids and features:

This repo is an attempt at building a Pico based alarm clock. It was created for my kids and features:

- date/time (obviously) - alarm (plays wav file on sdcard) - weather (current and forecast) - epaper screen - 3d printable case

The configuration is done remotely, and the clock synchronize from time to time (it can be forced too). The time is also fetched from a remote server.

Picoclock, from the project README
From the project README

Main components on the Picoclock

PCF8563TPicoMCP9808_MSOPPCM5100PAM8302AMCP23009-SOMCP45X1-104E

Picoclock bill of materials (BOM)

86 components, 47 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PCF8563T
U1
1
Pico
U2
1
MCP9808_MSOP
U3
1
PCM5100
U4
1
PAM8302A
U5
1
MCP23009-SO
U6
1
MCP45X1-104E
U7
1
BSS138
Q1
1
BSS138
Q3
1
Crystal
Y1
1
UART
J1
1
USB_A
J2
4
xx
J3, J4, J7, J8
1
Micro_SD_Card_Det1
J5
1
USB_C_Receptacle
J6
1
AUDIO
J9
1
USB
J10
1
Alt Power
J11
1
LED_5V
J12
1
USB_PICO
J13
Show 27 more
QtyPartRefs
1
Conn_01x24
J15
1
3V Cell
BT1
2
SJB
JP1, JP2
6
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6
1
1A 20V Schottky
D1
3
MBR0530
D2, D3, D4
2
FerriteBead
FB1, FB2
1
10uH
L1
1
22pF
C1
2
100nF
C2, C17
5
0.1uF
C3, C4, C5, C9, C12
1
10uF
C6
1
2.2uF
C7
1
2.2uF
C8
2
2.2nF
C10, C11
1
1uF
C14
1
10uF
C15
3
4.7uF
C18, C19, C20
6
1uF/25V
C21, C24, C25, C26, C27, C28
2
1uF/10V
C22, C23
2
220pF
C29, C30
11
10K
R1, R3, R8, R9, R10, R11, R12, R13 +3
2
470
R2, R4
2
5.1K
R5, R6
1
1.5K
R7
1
1K
R19
1
0.47
R22

Picoclock design files

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

Picoclock: common questions

What microcontroller does the Picoclock use?

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

How big is the Picoclock PCB?

The Picoclock measures 175.8 × 64 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Picoclock?

86 components, from 47 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 Picoclock design files?

From the locked/picoclock 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 Picoclock 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 Picoclock 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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