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Home › Magazines › 2009 › March › USB-I2C Bridge

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USB-I2C Bridge

Easyspeak I-square-C using 1-Wire

Published in issue 387, March 2009

USB-I2C Bridge
Modern computers no longer come with parallel or serial ports fitted. Although these ports see declining use in practice, to designers, a portless PC is a nuisance. To solve at least a part of the problem, we present an interface for the I2C bus for connection to an USB connection on your PC. It works a treat when used in the LabVIEW environment.

Components

Relevant websites

Free downloads

Resistors
(all 0805 shape)
R1 = 1kohm5
R2,R3 = 27ohm
R4,R5 = 4kohm7

Capacitors
C1 = 1µF (0805)
C2 = 4µF7 (0805)
C3 = 100nF (0805)
C4-C7 = 33pF (0603)

Inductors
L1,L2 = BLM21PG221SN1J (Murata) (220ohms at 100 MHz)

Semiconductors
IC1 = MAX8881EUT33+ (Maxim Integrated Products)
IC2 = DS2490S+ (Maxim Integrated Products)
IC3 = DS2413P+ (Maxim Integrated Products)

Miscellaneous
K1 = USB connector, PCB mount, type B
K2 = RJ-11 connector, PCB mount
X1 = 12MHz quartz crystal
PCB, ref. 080655-1, from www.ThePCBShop.com

Click below to download a PDF copy of this article from Elektor magazine.

 

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Magazine March 2009
UK387 (USD 6.70)
 

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PCB, bare
080655-1
 

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Software

Free download

Virtual Instruments for LabView 8.0

Free download
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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