Editing Input protection
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− | == | + | == signal input protection == |
Alas, people outside the electronics world live in places that have "low humidity" and "carpeted floors". | Alas, people outside the electronics world live in places that have "low humidity" and "carpeted floors". | ||
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A variety of signal input protection circuits: | A variety of signal input protection circuits: | ||
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− | + | resistor | |
− | + | zener | |
− | + | 2 clamping diodes to plus and minus power rails | |
− | + | 2 Schottky clamping diodes to plus and minus power rails | |
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+ | 2 Schottky clamping diodes to plus and minus power rails, and a resistor. (All 3 components directly connected to the microcontroller input pin; the other end of the resistor connected to the outside world). | ||
[http://www.piclist.com/techref/mimedecode.asp?url=piclist%5C2006%5C03%5C06%5C111156a%2Etxt&part=3] | [http://www.piclist.com/techref/mimedecode.asp?url=piclist%5C2006%5C03%5C06%5C111156a%2Etxt&part=3] | ||
− | + | transistor buffer ([http://www.piclist.com/techref/postbot.asp?by=time&id=piclist\2007\03\22\101919a Matt Pobursky]) | |
... | ... | ||
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... or some combination. | ... or some combination. | ||
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+ | [http://sound.westhost.com/impedanc.htm#spkz "Speaker Protection Systems"] | ||
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== Input Protection by what is being Protected == | == Input Protection by what is being Protected == | ||
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+ | === Semiconductors and Static Discharge === | ||
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+ | Static discharge can damage a wide range of semiconductors, through inputs or any other connection. More discussion would be nice. | ||
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=== Analog to Digital Converter Input Protection === | === Analog to Digital Converter Input Protection === | ||
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Filtering the high frequency response of an ADC input can also be useful if there are large variations at a frequency higher that you want to, or the ADC can resolve. | Filtering the high frequency response of an ADC input can also be useful if there are large variations at a frequency higher that you want to, or the ADC can resolve. | ||
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=== Power Supply Input Protection === | === Power Supply Input Protection === | ||
− | == | + | == further reading == |
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* [[Printed Circuit Boards#References]] discusses EMC guidelines | * [[Printed Circuit Boards#References]] discusses EMC guidelines |