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Arm v3

evezor·tobor_v00·cad/v1/arm_v3.kicad_pcb

Arm v3 PCB layout, top view — open source board by evezor

About the Arm v3 PCB

Arm v3 is an open source PCB design by evezor, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 250.2 × 63.3 mm, with 100 components from 42 distinct parts.

Other key parts include the XL1509, AMS1117-3.3, 74AHCT595, PCF8574 and DRV8825PWPR. By type, the board carries 34 capacitors, 20 resistors, 17 connectors, 9 diodes, 8 ICs and 3 jumpers.

It belongs with the robotics & motion designs in this gallery.

From the project

Tobor (robot spelled backwards), was built to be the most versatile open-source robotics system

Find out more about this project, additional source files will be released here

ESP32 microcontroller with 4 MB SPIRAM Runs Micropython 3 DRV8825 stepper motor drivers 2 AS5048B 14-bit absolute encoders Allows for low/no motion homing Collaborative programming 8 position addressable LED ring Can be used to display states of motors or the machine External stepper driver and peripheral port CNC controller powered by Fluid NC with dedicated FTDI and reset switch Micro-SD card slot WiFi enabled CANbus Edge Board Interface Servo header 24 VDC power input 1 user programmable tactile button Reset…

Arm v3, from the project README
From the project README

Main components on the Arm v3

XL1509AMS1117-3.374AHCT595PCF8574DRV8825PWPR

Arm v3 bill of materials (BOM)

100 components, 42 distinct parts.

QtyPartRefs
1
XL1509
U101
1
AMS1117-3.3
U102
3
74AHCT595
U103, U104, U105
1
PCF8574
U106
2
DRV8825PWPR
U201, U301
1
Conn_01x03
J101
1
Conn_01x06_MountingPin
J102
1
fan
J103
1
Conn_01x03
J104
1
Conn_02x04_Odd_Even
J105
3
Conn_01x04_MountingPin
J106, J108, J110
1
Barrel_Jack_Switch
J107
1
Conn_02x10_Odd_Even
J109
1
Micro_SD_Card_Det
J111
1
Conn_01x04
J112
1
Conn_01x02
J113
2
Bus_M.2_Socket_E_ESP32
J114, J115
2
Conn_01x04_MountingPin
J201, J301
1
Polyfuse_Small
F101
2
MountingHole
H122, H123
Show 22 more
QtyPartRefs
2
SolderJumper_2_Bridged
JP101, JP102
1
can_jumper
JP103
2
10k POT
RV201, RV301
1
SW_Push
SW101
2
TestPoint
TP201, TP301
8
SK6812MINI
D101, D102, D103, D104, D105, D106, D107, D108
1
SX35_SCHOTTKY
D109
1
68uF
L101
14
.1uF
C101, C102, C103, C104, C105, C106, C107, C108 +6
2
220uF
C109, C111
4
4.7uF 50V
C110, C112, C205, C305
2
22uF
C113, C115
2
10 nF
C201, C301
2
0.47uF
C202, C302
6
.1uF 100V
C203, C206, C207, C303, C306, C307
2
47uF
C204, C304
2
4.7k
R101, R102
1
120R
R103
7
10k
R104, R105, R106, R202, R203, R302, R303
4
220R
R107, R108, R109, R110
2
1.5k
R201, R301
4
0.1R
R204, R205, R304, R305

Arm v3 design files

The KiCad project lives in the evezor/tobor_v00 repository on GitHub; these links point at the commit this page was built from.

Arm v3: common questions

How big is the Arm v3 PCB?

The Arm v3 measures 250.2 × 63.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Arm v3?

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

Where can I download the Arm v3 design files?

From the evezor/tobor_v00 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Arm v3 design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which evezor chose for the repository.

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