HardLabs

Protein dispenser

psaundalkar·protein-dispenser·hardware/pcb/ProteinDispenser_Controller.kicad_sch

This repository ships a schematic but no board layout.

About the Protein dispenser PCB

Protein dispenser is an open source STM32 PCB design by psaundalkar, published on GitHub under the MIT license. It is a board, with 56 components from 33 distinct parts.

Its main chip is the STM32F103C8T6, from the STM32 family. Other key parts include the LM2596S-12, 78L05, MAX485 and ULN2803A. By type, the board carries 12 diodes, 10 capacitors, 9 resistors, 8 connectors, 8 relays and 5 ICs.

It belongs with the sensors designs in this gallery.

From the project

Engineering package for a protein-powder vending machine: a functional digital twin, an interactive 3D model of the cabinet interior, a fabricable KiCad control PCB, and system documentation. Built directly from the real machine at the installation site.

Engineering package for a protein-powder vending machine: a functional digital twin, an interactive 3D model of the cabinet interior, a fabricable KiCad control PCB, and system documentation. Built directly from the real machine at the installation site.

- 5 powder hoppers — Whey Isolate, Cocoa, Creatine, Oats, Vitamin; 1.5 kg each, 3.1 g/rev auger screws metered by revolution count. - Water system — 20 L tank, hot-water boiler (setpoint 65 °C) and a chiller loop (setpoint 4 °C) with condenser + compressor. - Actuators — 8 relays (5 auger motors, cup drop, hot water, cold water), an…

Main components on the Protein dispenser

LM2596S-1278L05STM32F103C8T6MAX485ULN2803A

Protein dispenser bill of materials (BOM)

56 components, 33 distinct parts.

QtyPartRefs
1
LM2596S-12
U1
1
78L05
U2
1
STM32F103C8T6
U3
1
MAX485
U4
1
ULN2803A
U5
1
2N7002
Q1
1
8MHz
Y1
1
DC_IN_12-24V
J1
1
SWD
J2
1
MODBUS
J3
1
SSR_DRIVE
J4
1
NTC_HOT
J5
1
NTC_COLD
J6
1
DIGITAL_IN
J7
1
RELAY_CONTACTS_8x_SPDT
J8
1
750mA
F1
8
JQX-13F-12VDC
K1, K2, K3, K4, K5, K6, K7, K8
1
SS34
D1
1
SMBJ33A
D2
1
SS54
D3
Show 13 more
QtyPartRefs
1
SMBJ6.5CA
D4
8
1N4007
D5, D6, D7, D8, D9, D10, D11, D12
1
33uH_3A
L1
1
470uF/35V
C1
5
100nF
C2, C5, C8, C9, C10
1
220uF/25V
C3
1
10uF/16V
C4
2
22pF
C6, C7
4
10k
R1, R2, R4, R6
1
120R
R3
1
1k
R5
2
10k_1%
R7, R8
1
10k_x4
RN1

Protein dispenser design files

The KiCad project lives in the psaundalkar/protein-dispenser repository on GitHub; these links point at the commit this page was built from.

Protein dispenser: common questions

What microcontroller does the Protein dispenser use?

The Protein dispenser is built around the STM32F103C8T6, from the STM32 family.

How many components are on the Protein dispenser?

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

Where can I download the Protein dispenser design files?

From the psaundalkar/protein-dispenser repository on GitHub, which has the schematic and a netlist; the links under Design files point to each one.

Can I use the Protein dispenser design in my own project?

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

Can I test firmware for the Protein dispenser without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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