AboutDave Nyce Expertise I have been an electronics engineer for 25 years. I can answer questions on analog and digital circuits and my specialty is sensors.
Experience I am the inventor on 23 US patents, and also some foreign ones. Developed sensors for over 25 years. Licensed private pilot (airplane and rotorcraft), have HAM radio license. I'm not an expert in computer networking.
Question I was wondering if you had a circuit that would perform a task i have. I need a circuit that will contol a 12V buzzer that is activated by a switch. the catch is that i would like there to be something that stops the buzzer after about a second or less even if you still press the button and then you cannot activate the buzzer again after say a minute after ringing. To make it a little clearer its to put in my store to call someone to serve you but i dont want the person to constantly ring it. If there is anything you have, i would greatly appreciate it!
Thanks, James
Answer What you want is called a monostable multivibrator, or one-shot. You want one that is not retriggerable.
This website does not have a utility for sending drawings, but you can find such a circuit in one of Radio Shack's "experimenter's notebook" pamphlets.
I also checked on the web under "monostable multivibrator" and found a schematic at
