- #1
Ali Inam
- 99
- 0
Hi guys, today I made this simple form of door bell. It is working perfectly, there is a simple push button, which on pushing, enables the buzzer to buzz on sufficient voltage.
But, when I showed my circuit to my intructer, he asked me to modify it in such a way so that when I push the button, it should wait for 2 to 3 seconds before it buzzes.
Any idea how I may do it ? Any new IC to be implemented ? or should I change the values of the capacitors which I am using in my circuit ?
I changed the resistor values using the formula which is demostrated on the wikipedia portion of the 555 IC, but it was of no use.
Please help...
http://4.bp.blogspot.com/_RpOfkmvmO...h_jjP8N0/s400/simple+electronic+door+bell.JPG
But, when I showed my circuit to my intructer, he asked me to modify it in such a way so that when I push the button, it should wait for 2 to 3 seconds before it buzzes.
Any idea how I may do it ? Any new IC to be implemented ? or should I change the values of the capacitors which I am using in my circuit ?
I changed the resistor values using the formula which is demostrated on the wikipedia portion of the 555 IC, but it was of no use.
Please help...
http://4.bp.blogspot.com/_RpOfkmvmO...h_jjP8N0/s400/simple+electronic+door+bell.JPG