Hi All,
my arduino standalone arduino resets at times during operation. At skips a function when button pressed. Long press has a function to perform a function 5 times.
attached schematic
Image from Original Post so we don't have to download it. See this Image Guide
That is too complicated for me.
...R
Hi,
Look at UNO schematic, you need a 0.1uF from reset pin to gnd.
Also if you are still using protoboard layout, just the wires will pickup switching spikes.
Tom... 
Well it was actually a electrolytic cap that i had placed in parallel to the buzzer. when removed it worked but thanks for the link to the schematic, i've added the cap at the reset to GND.
seems that the problem still persists. it wasn't the cap that i mentioned in my previous post. for some reason the standalone arduino resets several times. I had recently changed the pins assigned, not sure if those pins are creating some interference.