Luc Lemmens
About the article

Serial Interface for 1-Wire Bus

simple to operate from within Windows

Serial Interface for 1-Wire Bus
The 1-Wire devices from Dallas Semiconductor are components that via a simple serial connection can be connected to each other, a circuit or a computer. The RS232-interface described here makes the connection to a PC very straightforward. In addition, Dallas supplies the necessary software free of charge.The 1-Wire series from Dallas already has received attention on earlier occasions in this magazine, such as the E-key project in November 2000 and the 1-Wire Spy in February 2001. In those projects the communication between the 1-wire bus and the PC was controlled by a microcontroller which was specifically programmed for this purpose. Dallas itself also manufactures ICs that deal with interfacing to microcontrollers or PCs. Drivers, evaluation and development software are available for free and may be downloaded from the Dallas web site.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list
R1 = 4kOhm 7
C1 = 10µ F 25V radial
C2,C3 = 100nF
D1,D2 = BAT85
D3 = zener diode 4.7V 400 mW
D4,D5 = DS9503 (6-pin TSOC)
IC1 = DS2480BS (8-pin SOIC)
IC2 = 78L05
K1 = 9-way sub-D- socket (female), angled pins, PCB mount
PCB, order code 020022-1
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