USB-RS485 Conversion Adapter Ver. 2.1

About USB-RS485 Conversion Adapter

The USB-RS485 Conversion Adapter converts communications from the USB interface to the RS-485 interface and can drive KONDO B3M series servo motors.

Note that this is Ver. 2.1. For other versions, please refer to the following repositories.

• USB-RS485 Conversion Adapter Ver. 2.0

About Ver. 2.1

Ver. 2.1 has a switch and four indicator LEDs to turn the power supply for driving servo motors on and off on the board.

PCB preview image	Actual PCB	After component mounting

Repository Contents

\image

PCB preview images and capture of design screen

\libraries

Libraries used in Autodesk Eagle design

Schematic.pdf

Circuit diagram of this product

BOM.txt

Parts lists output from design data

.brd

Board wiring design file by Autodesk Eagle

.sch

Schematic design file by Autodesk Eagle

Gerber_data.zip

Zip folder of Gerber format files for PCB manufacturing requests.

LICENSE

This is a license to use this product. Please confirm before use.

.gitignore

File to exclude cache files from management.

Documentation

BOM

Eagle Design Parts #	Q'ty	Mfr. Product #	Supplier	Description
LED1, LED4	2	150060VS86000	Mouser	Standard LEDs - SMD Green 2V 20mA 573nm 0603
LED2, LED3	2	150060YS75000	Mouser	Standard LEDs - SMD Yellow 2V 20mA 590nm 0603
FL1	1	BLM18SD220SN1D	Mouser	Ferrite Beads 22 OHM 0603
R1, R3, R4	3	RC0603FR-101KL	Mouser	Thick Film Resistors - SMD 1 kOhms 100-200mW 1% 0603
R2	1	RC0603FR-1310KL	Mouser	Thick Film Resistors - SMD 10 kOhms 100-200mW 1% 0604
R6	1	RC0603FR-10120RL	Mouser	Thick Film Resistors - SMD 120 Ohms 100-200mW 1% 0605
R5, R7	2	RC0603FR-10680RL	Mouser	Thick Film Resistors - SMD 680 Ohms 100-200mW 1% 0606
R8	1	RC0603FR-102KL	Mouser	Thick Film Resistors - SMD 2 kOhms 100-200mW 1% 0607
C1	1	GRM188B11H103KA01	Akizuki	Multilayer Ceramic Capacitors SMD/SMT 0.01uF 50V 10% 0603
C2, C4	2	GCM188L81H104K57	Akizuki	Multilayer Ceramic Capacitors SMD/SMT 0.1uF 50V 10% 0603
C3	1	C1608X5R1C475K080AE	Mouser	Multilayer Ceramic Capacitors SMD/SMT 4.7uF 16V 10% 0603
D1, D2	2	CG0603MLC-05E	Mouser	ESD Protectors 5V 0603
CH1	1	XT60PW-M	Suzaku Lab.	DC Power Connector, Through Hole, Horizontal, Male, 30A 500V
CH2	1	S4B-XH-A(LF)(SN)	Akizuki	Connector Header Through Hole, Right Angle 4 position 2.5mm
USB1	1	MUSB-5B-NE-S175	Akizuki	Mini USB Connector 5P B type, Female, SMT type, without standoff
F1	1	MF-MSMF050-2	Mouser	PTC Resettable Fuses 15V .5A-HD 100A MAX
IC1	1	ADM3078E*1	Mouser	RS-485/RS-422 Transceiver (Half Duplex, 16 Mbps, DE/RE)
IC2	1	FT232RL	Akizuki	USB Interface IC USB to Serial UART
S1	1	DS-850K-S-ON	Akizuki	Rocker Switches 125VAC 5A

*1 : Since the ADM3078E from Analog Devices was not available at the time of fabrication, the MAX3485ED from HTC Korea was used as an alternative.

PCB Fabrication

PCB(Printed Circuit Board) manufacturing was outsourced to Elecrow.
The custom specifications are as follows.

• Layer : 2 layers
• Dimensions : 45 x 45
• Different PCB Design : 1eg
• PCB Thickness : 1.6
• PCB Color : Black
• Surface Finish : HASL
• Castellated Hole : No
• Copper Weight : 1oz
• PCB Stencil : Stencil 10cm X 10cm no frame[Top]

The data used to order fabrication are as follows.

• Eagle design rule : Elecrow Eagle Design Rule
• Eagle CAM file : Elecrow CAM file
• Gerber format data : Gerber_data.zip

Contact

If you have any questions, please contact MasatoKubotera, the product's designer, by E-mail.
E-mail : masatokubotera06@yahoo.co.jp

License Information

This product is open source.
Please review the LICENSE file for license information.

USB-RS485 Conversion Adapter Ver. 2.1 by Masato Kubotera is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.