HardLabs

Romi unified board

WPIRoboticsEngineering·ZenDriver

Romi unified board layout, top view — open source board by WPIRoboticsEngineering

About the Romi unified board

Romi unified board is an open source PCB design by WPIRoboticsEngineering, published on GitHub. It is a 4-layer board measuring 125.1 × 125.7 mm, with 68 components from 35 distinct parts.

Other key parts include the MP4423H, DRV8838 and TSSP58038. By type, the board carries 17 capacitors, 16 connectors, 15 resistors, 6 diodes, 4 ICs and 4 test points.

Romi unified board, from the project README
From the project README

Main components on the Romi unified board

MP4423HDRV8838TSSP58038

Romi unified board bill of materials (BOM)

68 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MP4423H
"Monolithic Power Systems Inc."
U1
2
DRV8838
"Texas Instruments"
U2, U3
1
TSSP58038
"Vishay Semiconductor Opto Division"
U4
2
SiS415DNT
"Vishay Siliconix"
Q1, Q2
1
ServoAnalog
"Adam Tech"
J1
1
Conn_01x19_Female
"Sullins Connector Solutions"
J2
2
LineSensor
"Sullins Connector Solutions"
J3, J4
3
THING
"Sullins Connector Solutions"
J5, J14, J15
1
Conn_02x19_Odd_Even
"Sullins Connector Solutions"
J6
1
Ultrasonic.
"Adam Tech"
J7
1
SPI
"Sullins Connector Solutions"
J8
1
i2c
"Sullins Connector Solutions"
J9
2
ROMI-Encoder
Samtec Inc.
J12, J13
3
Conn_01x03_Male
J16, J17, J18
2
SW_SPST
"Nidec Copal Electronics"
SW1, SW3
1
SW_SPDT
"Nidec Copal Electronics"
SW2
4
TestPoint
TP1, TP2, TP3, TP4
1
D_Zener
"Nexperia USA Inc."
D1
3
PMEG4005EJ,115
"Nexperia USA Inc."
D2, D4, D5
1
D
"Nexperia USA Inc."
D3
Show 15 more
QtyPartRefs
1
LED
"Würth Elektronik"
D8
1
5.1u
"Murata Electronics"
L1
4
220u
"United Chemi-Con"
C1, C15, C16, C17
5
10u
"Yageo"
C2, C3, C10, C11, C12
5
0.1u
"Samsung Electro-Mechanics"
C4, C5, C6, C7, C8
1
1u
"Samsung Electro-Mechanics"
C9
2
4.7
"Samsung Electro-Mechanics"
C13, C14
3
10k
"Stackpole Electronics Inc"
R1, R9, R10
1
270k
"Yageo"
R2
1
51.1k
“Bourns Inc.”
R3
1
22.1
"Yageo"
R4
1
7.68k
"Stackpole Electronics Inc"
R5
1
41.2k
"Stackpole Electronics Inc"
R6
6
100k
"Stackpole Electronics Inc"
R7, R8, R14, R15, R16, R17
1
330
"Stackpole Electronics Inc"
R25

Romi unified board design files

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

Romi unified board: common questions

How big is the Romi unified board?

The Romi unified board measures 125.1 × 125.7 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Romi unified board?

68 components, from 35 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Romi unified board design files?

From the WPIRoboticsEngineering/ZenDriver repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Romi unified board design in my own project?

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

More boards in ZenDriver