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Believotronics

Believotron·Believotronics·PCBAs/MiniJoystickMiniStepper/MiniJoyMiniStepper.kicad_pcb

Believotronics PCB layout, top view — open source STM32 board by Believotron

About the Believotronics PCB

Believotronics is an open source STM32 PCB design by Believotron, published on GitHub under the MIT license. It is a 2-layer board measuring 88.9 × 142.2 mm, with 81 components from 13 distinct parts.

Its main chip is the STM32F103C8T6_BLUE_PILL, from the STM32 family. Other key parts include the MCP3008T-I/SL, OLED_128x32_I2C, CD74HC595 and ULN2803. By type, the board carries 24 connectors, 11 ICs, 7 resistors and 5 capacitors.

It belongs with the robotics & motion, wearables and power & battery designs in this gallery.

From the project

Believotronics is a low-cost DIY open source robotics platform you can print and build at work or from home. Our first projects are a MicroscopeBot and a ThroughholeSolderBot.

Believotronics is a low-cost DIY open source robotics platform you can print and build at work or from home. The MiniJoystickMiniStepper motor is a proof of concept to allow us to start prototyping controls using joysticks and driving motors with the ULM2803s.

Please consider helping us with your financial support:

Phase 3 (Current): Pause This project is on hold until the Core3D refactoring project is complete.

Believotronics, from the project README
From the project README

Main components on the Believotronics

MCP3008T-I/SLOLED_128x32_I2CCD74HC595ULN2803STM32F103C8T6_BLUE_PILL

Believotronics bill of materials (BOM)

81 components, 13 distinct parts.

QtyPartRefs
1
MCP3008T-I/SL
U1
1
OLED_128x32_I2C
U2
4
CD74HC595
U3, U4, U5, U6
4
ULN2803
U7, U8, U9, U10
1
STM32F103C8T6_BLUE_PILL
U11
8
STEPPER_UNI_5P
J0, J1, J2, J3, J4, J5, J6, J7
16
TH_0.1_1x1
J8, J9, J10, J11, J12, J13, J14, J15 +8
6
CONN_01X01
COM0, COM1, GND1, V_3.3, V_MOTOR1, V_USB1
28
TH_0.1_1x1
JMOTOR_CLK_OUT0, JMOTOR_CLK_OUT1, JMOTOR_CLK_SHIFT0, JMOTOR_CLK_SHIFT1, JMOTOR_GND0, JMOTOR_GND1, JMOTOR_GND3, JMOTOR_GND11 +20
5
0.1 uF
C1, C2, C3, C4, C100
4
XYJOY
R0, R1, R2, R3
1
0
R99
2
10K
R101, R102

Believotronics design files

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

Believotronics: common questions

What microcontroller does the Believotronics use?

The Believotronics is built around the STM32F103C8T6_BLUE_PILL, from the STM32 family.

How big is the Believotronics PCB?

The Believotronics measures 88.9 × 142.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Believotronics?

81 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the Believotronics design files?

From the Believotron/Believotronics repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Believotronics design in my own project?

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

Can I test firmware for the Believotronics 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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