IFD:Printed Interfaces/introduction to electronics: Difference between revisions

IFD:Printed Interfaces/introduction to electronics (view source)

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 [http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+43%0Av+-112+16+-112+-64+0+2+10+5+0+0+0.5%0Ax+-208+68+64+71+4+12+Capacitors%5Csstore%5Cscharge%5Csover%5Csa%5Cscertain%5Cstime%5Csspan.%5Cs%0Ax+-95+-157+0+-154+4+20+Capacitors%0Aw+-208+16+-112+16+0%0Aw+-112+16+32+16+0%0Ar+32+16+32+-64+0+1000%0Ac+-112+-64+32+-64+0+0.000002+-4.9914229719235905%0Ap+96+-64+96+16+1+0%0Aw+32+-64+96+-64+0%0Aw+32+16+96+16+0%0Ap+-208+-64+-208+16+1+0%0Aw+-208+-64+-112+-64+0%0Ax+-208+142+189+145+4+12+In%5Csa%5Csreal-world%5Csscenario%5Csthey%5Cswill%5Csalways%5Csdischarge%5Csbecause%5Csof%5Csleackage.%5Cs%0Ax+-209+93+221+96+4+12+The%5Csamount%5Csof%5Cscharge,%5Csthey%5Cscan%5Cshold,%5Csdepends%5Cson%5Cstheir%5Cssize%5Csgiven%5Csin%5CsFarads%5Cs(F).%0Ax+-209+116+188+119+4+12+The%5Csbigger%5Cstheir%5Cscapacity%5Cs(F),%5Csthe%5Cslonger%5Csthey%5Csneed%5Csto%5Cscharge%5Csor%5Csdischarge.%0Ax+-208+171+287+174+4+12+In%5Csa%5Cscircuit%5Cstheir%5Cscharge%5Csand%5Csdischarge%5Cstimes%5Csare%5Cscontrolled%5Cswith%5Csa%5Csseries%5Csor%5Csparallel%5Csresistor.%0Ao+10+8+0+4098+5+0.1+0+1%0Ao+6+8+0+4098+5+0.1+1+2+6+3%0Ao+7+8+0+4098+10+0.1+2+1%0A Capacitors]
 * In printed electronics, we use capacitors to detect the presence of fingers by a change in capacitance
+[http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+43%0Av+-112+16+-112+-64+0+2+400+5+0+0+0.5%0Ax+-208+68+-1+71+4+12+Fast%5Cssignals%5Cspass%5Csthrough%5Cscapacitors!%0Ax+-206+-135+-34+-132+4+20+Capacitive%5CsSensors%0Aw+-112+16+32+16+0%0Ar+32+16+32+-64+0+1000%0Ac+-112+-64+32+-64+0+1e-9+-5%0Ax+-211+145+340+148+4+12+When%5Cswe%5Csapproach%5Csthis%5Csplate%5Cswith%5Csour%5Csfingers,%5Csit%5Csforms%5Csa%5Cssecond%5Csplate%5Csand%5Csincreases%5Csthe%5Cscapacitance,%0Ax+-209+93+213+96+4+12+The%5Csamplitude%5Csof%5Csthe%5Cssignal%5Csthat%5Cspasses,%5Csdepends%5Cson%5Csthe%5Cssize%5Csof%5Csthe%5Cscapacitor.%0Ax+-209+116+141+119+4+12+With%5Cscapacitove%5Cssensors,%5Cswe%5Csprint%5Csonly%5Csone%5Csplate%5Csof%5Csthe%5Cscapacitor.%0Ax+-208+171+95+174+4+12+which%5Csin%5Csturns%5Csamplifies%5Csthe%5Cssignal%5Csthat%5Cspasses%5Csthrough.%0Ax+-208+197+71+200+4+12+We%5Cscan%5Csmeasure%5Csthis%5Cssignal%5Cswith%5Csa%5Csmicro%5Cscontroller!%0Ao+0+8+0+4098+5+0.1+0+2+0+3%0Ao+4+8+0+4098+5+0.1+1+2+4+3%0A Capacitive Sensors]