HardLabs

Bus raspberry pi

makerbus·bus_raspberry_pi·rev_c/bus_raspberry_pi.kicad_pcb

Bus raspberry pi PCB layout, top view — open source AVR/Arduino board by makerbus

About the Bus raspberry pi PCB

Bus raspberry pi is an open source AVR/Arduino PCB design by makerbus, published on GitHub. It is a 2-layer board measuring 100 × 50 mm, with 42 components from 31 distinct parts.

Its main chip is the ATMEGA324_DIP40, from the AVR/Arduino family. Other key parts include the MCP7940, 74HC08, MCP2562, L78L05AC and L78L33AC. By type, the board carries 12 capacitors, 7 ICs, 7 resistors, 3 connectors, 2 crystals and 2 diodes.

It belongs with the usb & debug tools designs in this gallery.

From the project

Raspberry Pi that can be connected to a bus.

Raspberry Pi that can be connected to a bus.

The bus is a half-duplex multi-drop bus that runs at 500 Kbps. It uses a Microchip MCP2562 CAN bus transceivers to connect to the bus.

The software environment for the busraspberrypi is more complicated than we would like. The busraspberrypi deliberately uses an ATmega324P microcontroller to be as compatible as possible with the Arduino community. Unfortunately, about the only board out there that used the '324P is the Sanguino and it rapidly fell out of use. Thus, '324P support is a bit more complicated than we would like. The key thing is that…

Main components on the Bus raspberry pi

MCP794074HC08MCP2562L78L05ACATMEGA324_DIP40L78L33ACMCP24XX32A

Bus raspberry pi bill of materials (BOM)

42 components, 31 distinct parts.

QtyPartRefs
1
MCP7940
U1
1
74HC08
U2
1
MCP2562
U3
1
L78L05AC
U4
1
ATMEGA324_DIP40
U5
1
L78L33AC
U6
1
MCP24XX32A
U7
1
16MHz
X1
1
32.768KHz
X2
1
TERMINATE_JUMPER
J1
1
LED_JUMPER
J2
1
RESET_SEL
J3
1
CR-2032/VCN
BAT1
1
RASPI_CONNECTOR_40
N1
1
BUS_HEADER
N3
2
FTDI_HEADER
N4, N5
1
AVR_ISP_HEADER
N7
1
SERIAL_CONNECTOR
N8
1
JTAG_HEADER
N9
1
MJTP1243
SW1
Show 11 more
QtyPartRefs
1
SD101C-TR
D1
1
LED
D2
2
18pF
C1, C2
8
.1uF
C3, C4, C5, C6, C7, C11, C12, C13
2
1uF
C8, C9
1
120 1%
R1
1
100K_SIP6
R2
1
10K
R3
2
470
R4, R5
1
3K9_SIP5
R6
1
100K
R7

Bus raspberry pi design files

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

Bus raspberry pi: common questions

What microcontroller does the Bus raspberry pi use?

The Bus raspberry pi is built around the ATMEGA324_DIP40, from the AVR/Arduino family.

How big is the Bus raspberry pi PCB?

The Bus raspberry pi measures 100 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bus raspberry pi?

42 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bus raspberry pi design files?

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

Can I use the Bus raspberry pi design in my own project?

The repository has no license, so all rights stay with makerbus. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Bus raspberry pi without the hardware?

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

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