you can see the DS18b20 temp sensor at the top above the 8x8 LED matrix
the two large holes at the top corners are for a cord lanyard to be attached and the Scouts can wear it around their neck....
As best I can tell, your concern for accuracy comes into play when the clock is allowed to count up to a (relatively) large number.
While doing some testing on seconds counts in the 5...
Here is another one of DT's gems "MBAM". Maybe one of the moderators could move it here?
Henrik and Dwight.
I am not an expert by any stretch of the immagination, but I think I have uncovered some potential issues when using DIV32 in this manner.
After reviewing the algorithm...