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Sense Multiple Pushbuttons Using Only Two Wires

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Abstract: For applications that require less than a keyboard or numeric keypad, this simple circuit monitors multiple pushbutton switches using a single multi-channel 1-Wire® addressable switch (DS2408), and a few external components.
Maxim > Design support > App notes > 1-Wire Devices > APP 4849
Maxim > Design support > App notes > Interface Circuits > APP 4849

Keywords: 1-Wire switches, pushbutton switches, microcontrollers

Feb 10, 2011
APPLICATION NOTE4849
Sense Multiple Pushbuttons Using Only Two Wires
By:Bernhard Linke

Abstract:For applications that require less than a keyboard or numeric keypad, this simple circuit monitors multiple pushbutton
switches using a single multi-channel 1-wire addressable switch (DS2408), and a few external components.

A similar version of this article appeared in the September 9, 2010 issue of EDN magazine.

Keyboards and numeric keypads often provide the user
Sense Multiple Pushbuttons Using Only Two Wires
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