hi,
i built arduino on breadboard (http://arduino.cc/en/main/standalone) , have question 2 capacitors before , after voltage regulator:
i know there several different use cases capacitors; these used stabilizing voltage/current. guide explicitly states capacity of 10 µf.
can use capacitors arbitrary capacity higher 10 µf @ place in circuit? there drawbacks apart being more expensive , taking more space?
as extreme example: there disadvantage of using 1 f capacitors other being huge, expensive , totally unnecessary? "the bigger, better" valid rule of thumb in scenario?
// edit: found out called "decoupling", decoupling capacitors. read: higher capacity, slower "reaction time" - is true?
i built arduino on breadboard (http://arduino.cc/en/main/standalone) , have question 2 capacitors before , after voltage regulator:
i know there several different use cases capacitors; these used stabilizing voltage/current. guide explicitly states capacity of 10 µf.
can use capacitors arbitrary capacity higher 10 µf @ place in circuit? there drawbacks apart being more expensive , taking more space?
as extreme example: there disadvantage of using 1 f capacitors other being huge, expensive , totally unnecessary? "the bigger, better" valid rule of thumb in scenario?
// edit: found out called "decoupling", decoupling capacitors. read: higher capacity, slower "reaction time" - is true?
these capacitors used stabilise regulator itself, such not start oscillating, because high gain regulator.
the capacitors should placed close regulator chip, physical possible.
this because wiring between regulator , capacitor work radio frequency coil, meaning can unstable again.
empiric values 1µf on both input , ouput, though there several different political correct suggestions around.
that should keep on safe grounds.
the capacitors should placed close regulator chip, physical possible.
this because wiring between regulator , capacitor work radio frequency coil, meaning can unstable again.
empiric values 1µf on both input , ouput, though there several different political correct suggestions around.
that should keep on safe grounds.
Arduino Forum > Using Arduino > General Electronics > Capacity of decoupling capacitors
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