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Pcb

davidmpye·snackbot·vmc/pcb/pcb.kicad_pcb

Pcb layout, top view — open source RP2040/RP2350 board by davidmpye

About the Pcb

Pcb is an open source RP2040/RP2350 PCB design by davidmpye, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 85 × 90 mm, with 83 components from 33 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the 74LS14. By type, the board carries 41 resistors, 17 transistors, 14 connectors, 5 diodes, 3 capacitors and 2 ICs.

From the project

Code, PCB design and 3d printed bits to convert our vending machine to a Pi-based solution

Snackbot is Makerspace's vending machine

It was a Polyvend vending machine, but is now a bit of a hybrid of Raspberry Pi and Pico microcontrollers.

More information (and pictures!) to follow!

Main components on the Pcb

Pico74LS14

Pcb bill of materials (BOM)

83 components, 33 distinct parts.

QtyPartRefs
1
Pico
U1
1
74LS14
U2
14
BSS138
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +6
1
BC817
Q14
2
MMBT3906
Q15, Q17
1
Conn_02x08_Odd_Even
J1
1
Conn_01x02_Pin
J2
1
24VAC
J3
1
MDB_CONN
J4
1
I2C header
J5
1
24VDC
J6
2
Conn_01x02
J7, J8
1
PICO_DEBUG_HEADER
J9
1
ONE_WIRE_1
J10
1
ONE_WIRE_2
J11
1
AUX_1
J12
1
AUX_2
J13
1
AUX_3
J14
1
Polyfuse
F1
4
LED
D1, D3, D4, D5
Show 13 more
QtyPartRefs
1
GBU6K
D2
1
C
C1
1
1000uF 50V
C2
1
330uF 50V
C3
29
10K
R1, R2, R3, R4, R5, R6, R7, R8 +21
3
R
R27, R33, R34
1
470R
R28
1
5R
R29
1
4k7
R31
1
R470
R35
1
750R
R37
1
1.4K
R38
3
5.1R
R39, R40, R41

Pcb design files

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

Pcb: common questions

What microcontroller does the Pcb use?

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

How big is the Pcb?

The Pcb measures 85 × 90 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pcb?

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

Where can I download the Pcb design files?

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

Can I use the Pcb design in my own project?

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

Can I test firmware for the Pcb 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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