AVR-Chat

Micah Stevens wrote:

> If you have 10, 100 ohm resistors in series, and each is 1% tolarance, the 
> tolarance of the total group is +- 10%.. That is indeed correct, and if each 
> is +-10%, then the total tolerance is +-100%.. odd as it may sound. 

Uh, no.

Ten, 100 ohm, 10% tolerance resistors in series add to 1000 ohms.

If they are all at the maximum of their range, 110 ohms, then their sum
is 1100 ohms, still +10% of 1000 ohms.

Likewise, at the minimum of their range, 90 ohms, then their sum is 900
ohms, or -10% of 1000 ohms.

Same for 1% resistors.  Same for parallel connection vs. series connection.

-Johnathan