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johanwheeler·ch32-fireplace·PCBs/Back/Back.kicad_pcb

Back PCB layout, top view — open source RISC-V board by johanwheeler
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About the Back PCB

Back is an open source RISC-V PCB design by johanwheeler, published on GitHub under the MIT license. It is a 2-layer board measuring 82 × 82 mm, with 145 components from 12 distinct parts.

Its main chip is the C5299908, from the RISC-V family. By type, the board carries 66 capacitors, 64 diodes, 7 resistors, 2 connectors, 1 IC and 1 buzzer.

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

From the project

Ch32 based christmas card with 8x8 screen, sound and capacitive buttons

And a happy new year! Here you will find some instructions for the christmas card, as well as some technical details.

https://github.com/johanwheeler/ch32-fireplace/assets/45564940/a2e65534-c451-412c-9a83-9337bf3cca4e

Longer demo here, Short Hackaday article

If your card has white plastic in front of the screen, remove the front plate and peel the film, then connect to any USB-C power source. The stockings above the fire are actually touch buttons! Press firmly to interact.

Back, from the project README
From the project README

Main components on the Back

C5299908

Back bill of materials (BOM)

145 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
C5299908
CH32V003F4U6
U1
1
PWR_CONN
J1
1
CAP_CONN
J4
1
C391038
Buzzer
BZ1
1
C269105
750mA
F1
3
Tooling
H1, H2, H3
64
C5349954
RGB_1516
D1, D2, D3, D4, D5, D6, D7, D8 +56
66
C1525
100n
C1, C2, C3, C4, C5, C6, C7, C8 +58
1
C2904881
Photoresistor
R1
1
C25804
10k
R2
2
C23186
5.1k
R3, R4
3
C23203
560k
R5, R6, R7

Back design files

The KiCad project lives in the johanwheeler/ch32-fireplace repository on GitHub; these links point at the commit this page was built from.

Back: common questions

What microcontroller does the Back use?

The Back is built around the C5299908, from the RISC-V family.

How big is the Back PCB?

The Back measures 82 × 82 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Back?

145 components, from 12 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 Back design files?

From the johanwheeler/ch32-fireplace 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 Back design in my own project?

Yes, under the terms of its MIT license, which johanwheeler chose for the repository.

Can I test firmware for the Back without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RISC-V firmware against it before you order a PCB.

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