HardLabs

Fercus left

Dachtire·fercus·hardware/pcb/fercus-left/fercus-left.kicad_pcb

Fercus left PCB layout, top view — open source RISC-V board by Dachtire

About the Fercus left PCB

Fercus left is an open source RISC-V PCB design by Dachtire, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 133 × 133 mm, with 241 components from 33 distinct parts.

Its main chip is the CH32V208CBU6, from the RISC-V family. Other key parts include the XC6206P332MR and ETA9084E10. By type, the board carries 52 transistors, 49 switches, 47 resistors, 43 diodes, 38 capacitors and 4 connectors.

It belongs with the keyboards and iot & wireless designs in this gallery.

From the project

Wireless low profile optical switch split keyboard

Main components on the Fercus left

XC6206P332MRCH32V208CBU6ETA9084E10

Fercus left bill of materials (BOM)

241 components, 33 distinct parts.

QtyPartRefs
1
XC6206P332MR
U1
1
CH32V208CBU6
U2
1
ETA9084E10
U3
42
KTR-0602PTD
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +34
10
BSS138
Q43, Q44, Q45, Q46, Q47, Q48, Q49, Q50 +2
1
32MHz
Y1
1
32.768kHz
Y2
2
USB_C_Receptacle_USB2.0
J1, J2
1
AFH34-S06FIA-1H
J3
1
Molex_PicoBlade_53261-0371_1x03-1MP_P1.25mm_Horizontal
J5
42
SW_LPO
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +34
6
SW_Push
SW43, SW44, SW45, SW46, SW47, SW48
1
SW_SPDT
SW49
1
Thermistor_NTC
TH1
42
KTR-0602IRC-850
D1, D2, D3, D4, D5, D6, D7, D8 +34
1
LED_RABG
D43
1
1.8nH
L1
1
2.2uH
L2
1
22uF
C1
28
100nF
C2, C3, C4, C7, C8, C10, C11, C13 +20
Show 13 more
QtyPartRefs
2
1.8pF
C5, C9
3
1uF
C6, C18, C20
2
12pF
C14, C15
1
10uF
C16
1
10uF
C19
4
5.1kR
R1, R2, R3, R4
7
10kR
R5, R6, R7, R8, R9, R40, R44
1
150R
R10
2
100R
R11, R12
14
75R
R15, R22, R23, R24, R25, R26, R27, R28 +6
6
1kR
R16, R17, R18, R19, R20, R21
1
2.49kR
R37
12
100kR
R38, R39, R41, R43, R46, R48, R50, R52 +4

Fercus left design files

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

Fercus left: common questions

What microcontroller does the Fercus left use?

The Fercus left is built around the CH32V208CBU6, from the RISC-V family.

How big is the Fercus left PCB?

The Fercus left measures 133 × 133 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fercus left?

241 components, from 33 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fercus left design files?

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

Can I use the Fercus left design in my own project?

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

Can I test firmware for the Fercus left 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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