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Topic: Help on faulty project. (Read 1 time) previous topic - next topic

Nick Gammon

so i should attach it to the ground pin of the IC's? or the VCC?
and in series or in paralell? to ground. and i do not need some on the arduino itself right.

Between VCC and GND, on both sides of the chip.  (ie. VCC and GND, and AVCC and GND).


Required because even though Vcc and AVcc are connected to the 5V source, they are different pins. and ANY Vcc supply pin of any kind Must have it's own bypass capacitor, Not for the board, for the chip internal connections.

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"The solution of every problem is another problem." -Johann Wolfgang von Goethe
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thank you so much for your thorough explanation.
i don't remember whether we have ceramic 1uF's or electrolytic caps at school, but i could use either one, as long i follow the pos to neg on the electrolytic ones.

sry for my poor understanding but one more question i didn't quiet catch:
when you say bypass, you mean by putting the cap in parralel to ground?
kinda like this?

thank you again for help

Nick Gammon

0.1 uF, not 1 uF.

I said before "Between VCC and GND". How else can you interpret that? One leg goes to Vcc, the other leg goes to Gnd.


Some people need to see something to understand fully, nothing wrong with that
and don't forget there is actually significance in using a ceramic. 1uf cap,  it works better for the high frequency noise that a electrolytic would miss

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