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SeanP2001·Sunrise_Alarm_Clock_V3·PCBs/Main_PCB/Main_PCB.kicad_pcb

Main PCB layout, top view — open source RP2040/RP2350 board by SeanP2001

About the Main PCB

Main is an open source RP2040/RP2350 PCB design by SeanP2001, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 70 × 56 mm, with 12 components from 11 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the DS1302+. By type, the board carries 5 connectors, 2 ICs, 2 transistors, 1 crystal, 1 battery holder and 1 buzzer.

It belongs with the displays & leds designs in this gallery.

From the project

- Introduction - Brief - Development Roadmap - Circuitry - Schematics - Main PCB - Button PCB - Light PCB - PCB Design - Main PCB - Button PCB - Light PCB - Soldering - Main PCB - Button PCB - Light PCB - Enclosure - CAD Enclosure - Assembled Enclosure - Code - Documentation - Ho

- Introduction - Brief - Development Roadmap - Circuitry - Schematics - Main PCB - Button PCB - Light PCB - PCB Design - Main PCB - Button PCB - Light PCB - Soldering - Main PCB - Button PCB - Light PCB - Enclosure - CAD Enclosure - Assembled Enclosure - Code - Documentation - How to Add a New App - Further Work

This is the third version of the "Sunrise Alarm Clock" project. The first version used an Arduino Mega and an LCD keypad shield. The second version used a Wemos D1 mini (ESP8266) and 0.96" OLED on a single custom PCB. This design was fully functional but it did not look like an alarm…

Main, from the project README
From the project README

Main components on the Main

PicoDS1302+

Main bill of materials (BOM)

12 components, 11 distinct parts.

QtyPartRefs
1
Pico
U1
1
DS1302+
U2
2
2N3904
Q1, Q2
1
32.768 KHz
Y1
1
LIGHT
J1
1
OLED
J2
1
BUTTONS
J3
1
USB1
J4
1
USB2
J5
1
CR2032_Coin_Cell
BT1
1
Buzzer
BZ1

Main design files

The KiCad project lives in the SeanP2001/Sunrise_Alarm_Clock_V3 repository on GitHub; these links point at the commit this page was built from.

Main: common questions

What microcontroller does the Main use?

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

How big is the Main PCB?

The Main measures 70 × 56 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Main?

12 components, from 11 distinct parts. The full bill of materials is listed on this page.

Where can I download the Main design files?

From the SeanP2001/Sunrise_Alarm_Clock_V3 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Main design in my own project?

Yes, under the terms of its GPL-3.0 license, which SeanP2001 chose for the repository.

Can I test firmware for the Main 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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