check http://www.theelectronicshobbyist.com/blog/phase-0-of-the-ipon-project/ for an example of how I used sound output in response to an input signal from a switch and a force sensor. I played a more elaborate sound, but you can output only a buzzing sound if you want (by not varying the frequency like I did).

will try your suggestions if same result will came out.. I'am still on a learning stage
thanks a lot..
btw,
if you could suggest how to include alarm or buzzer (a ding dong i guest ^_^) once button press….

the easiest way to do this is to instead of using the variable count itself as the number to display, use “count % 100″, which will yeld 0 when count is 100, 1 when count is 101, and so on. Kinda like you did using the modulo operation on the tens unit display.

So you can create another variable, say “display”, which will be “display = count % 100;”, and then instead of using count you use display. (as in “unitsDigit = display % 10;”) does that make sense? let me know how that works.

br,
ronald

br,
ronald

br,
ronald

to have the system count up using just one button you will keep the units digit to be the modulus (%) of the current count by 10, and the tenths digit to be the integer division (/) of the current count by 10. Something like:

// check button
int val = digitalRead(BTN);
if (val == HIGH) {
count++;
unitsDigit = count % 10;
tensDigit = count / 10;
delay(10);
}

thanks very much!
best regards,
ronald