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This method does take only four resistors whereas the pure [http://en.wikipedia.org/wiki/Resistor_ladder R-2R ladder method] requires five to six resistors for 3 switches).
This method does take only four resistors whereas the pure [http://en.wikipedia.org/wiki/Resistor_ladder R-2R ladder method] requires five to six resistors for 3 switches).
{{ADFImage|Trinket-Alarme-Base-12.jpg}}
{{ADFImage|Trinket-Alarme-Base-12.png}}
<small> R-2R ladder (source: [http://en.wikipedia.org/wiki/Resistor_ladder Wikipedia])</small>
<small> R-2R ladder (source: [http://en.wikipedia.org/wiki/Resistor_ladder Wikipedia])</small>
{{Trinket-Alarme-TRAILER}}
{{Trinket-Alarme-TRAILER}}