tutorials:learn:sensors:fsr.html
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tutorials:learn:sensors:fsr.html [2010/10/07 19:29] daigo |
tutorials:learn:sensors:fsr.html [2010/10/07 19:31] daigo |
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| [[http://www.arijoseph.com/blog/2008/10/itppcomp-tapper-proposal/|Tapper, a musical interface that works by having you tap your fingers to the music]] | [[http://www.arijoseph.com/blog/2008/10/itppcomp-tapper-proposal/|Tapper, a musical interface that works by having you tap your fingers to the music]] | ||
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| ^Force (lb)^Force (N)^FSR Resistance^(FSR + R) Ω^Current thru FSR+R^Voltage across R^ | ^Force (lb)^Force (N)^FSR Resistance^(FSR + R) Ω^Current thru FSR+R^Voltage across R^ | ||
| - | ^None^None^|Infinite|Infinite!|0 mA|0V| | + | ^None^None|Infinite|Infinite!|0 mA|0V| |
| - | ^0.04 lb^0.2 N^|30KΩ|40 KΩ|0.13 mA|1.3 V| | + | ^0.04 lb^0.2 N|30KΩ|40 KΩ|0.13 mA|1.3 V| |
| - | ^0.22 lb^1 N^|6 KΩ| 16 KΩ|0.31 mA|3.1 V| | + | ^0.22 lb^1 N|6 KΩ| 16 KΩ|0.31 mA|3.1 V| |
| - | ^2.2 lb^10 N^|1 KΩ|11 KΩ|0.45 mA|4.5 V| | + | ^2.2 lb^10 N|1 KΩ|11 KΩ|0.45 mA|4.5 V| |
| - | ^22 lb^100 N^|250 Ω|10.25 KΩ|0.49 mA|4.9 V| | + | ^22 lb^100 N|250 Ω|10.25 KΩ|0.49 mA|4.9 V| |
| //This table indicates the approximate analog voltage based on the sensor force/resistance w/a 5V supply and 10K pulldown resistor// | //This table indicates the approximate analog voltage based on the sensor force/resistance w/a 5V supply and 10K pulldown resistor// | ||
| Note that our method takes the somewhat linear resistivity but does not provide linear voltage! That's because the voltage equasion is: | Note that our method takes the somewhat linear resistivity but does not provide linear voltage! That's because the voltage equasion is: | ||
| - | <p align="center" class="style2">Vo = Vcc ( R / (R + FSR) ) | + | <code>Vo = Vcc ( R / (R + FSR) )</code> |
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| That is, the voltage is proportional to the **inverse** of the FSR resistance. | That is, the voltage is proportional to the **inverse** of the FSR resistance. | ||
/home/ladyada/public_html/wiki/data/pages/tutorials/learn/sensors/fsr.html.txt · Last modified: 2016/01/28 18:05 (external edit)
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