HardLabs

Romi unified board-2layer

WPIRoboticsEngineering·ZenDriver

Romi unified board-2layer layout, top view — open source board by WPIRoboticsEngineering

About the Romi unified board-2layer

Romi unified board-2layer is an open source PCB design by WPIRoboticsEngineering, published on GitHub. It is a 4-layer board measuring 125.1 × 125.7 mm, with 71 components from 36 distinct parts.

Other key parts include the MP4423H, DRV8838 and TSSP58038. By type, the board carries 18 connectors, 17 capacitors, 15 resistors, 6 diodes, 5 ICs and 4 test points.

Romi unified board-2layer, from the project README
From the project README

Main components on the Romi unified board-2layer

MP4423HDRV8838TSSP58038

Romi unified board-2layer bill of materials (BOM)

71 components, 36 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MP4423H
"Monolithic Power Systems Inc."
U1
3
DRV8838
"Texas Instruments"
U2, U3, U5
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
Conn_01x03_Male
"JST Sales America Inc."
J10, J11
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
Show 16 more
QtyPartRefs
1
D
"Nexperia USA Inc."
D3
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-2layer 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-2layer: common questions

How big is the Romi unified board-2layer?

The Romi unified board-2layer 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-2layer?

71 components, from 36 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-2layer 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-2layer 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.

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