Hello Forum users!
This is my first post ... please forgive me if I make mistakes / waffle on / use the wrong terminology / confuse
Three sections - Please feel free to skip ... to GREEN
ITALICS red - Background of my issue
BOLD green - Project - What I would like the circuit to do
BLUE - SUMMARY
Door bell
I purchased a door bell and the battery soon became depleted fairly quickly, so i decided to use a PSU to alleviate the need to replace batteries
The door bell broke - the solenoid locked up and would not move
I bought a new unit and the same thing happened again
I looked into the issue further and discovered that the doorbell push button had been pushed in at a funny angle and stayed "stuck-in"
I surmised that the solenoid had been receiving a constant power source and had burnt out
I was lucky enough to be able to exchange the doorbell unit and used the supplied 9v (PP3) battery
When the door bell stopped working again, due to another sticking button situation, the battery was dead
I oiled the doorbell buttons outer edge and was unable to make it stick again - solved!
I would still like to use the 9v PSU but need to prevent the button, if it sticks again, from frying the solenoid
Hence this post ...
I thought that if i bought a 555 timer i could rig up a circuit that would allow a delay in the button pressses
So far, plenty of people talking about it but no solution ... that I can find
My QUESTION is thus:
What circuit would allow the following to take place?
A guest arrives at the house and presses the door bell button
The door bell rings
If the guest presses the button again, within a preset time of 10 seconds, nothing happens
After 10 seconds have passed, the circuit would allow the door bell to activate
Each time the button is pressed, one of two things happen
1 - The door bell rings and the timer starts again
2 - If the timer is still in the counting state, each button press or continuous depressed state would cause the timer to start again
SUMMARY
I have searched high and low but cannot work this out
I have lots of 555 timers and can obviously get extras parts as and when
My electronic ability is limited and I am not even sure that what I am asking is possible - although I am a fan of "nothing is impossible - EVERYTHING is possible"
Thank you one and all in advance for your help
This is my first post ... please forgive me if I make mistakes / waffle on / use the wrong terminology / confuse
Three sections - Please feel free to skip ... to GREEN
ITALICS red - Background of my issue
BOLD green - Project - What I would like the circuit to do
BLUE - SUMMARY
Door bell
I purchased a door bell and the battery soon became depleted fairly quickly, so i decided to use a PSU to alleviate the need to replace batteries
The door bell broke - the solenoid locked up and would not move
I bought a new unit and the same thing happened again
I looked into the issue further and discovered that the doorbell push button had been pushed in at a funny angle and stayed "stuck-in"
I surmised that the solenoid had been receiving a constant power source and had burnt out
I was lucky enough to be able to exchange the doorbell unit and used the supplied 9v (PP3) battery
When the door bell stopped working again, due to another sticking button situation, the battery was dead
I oiled the doorbell buttons outer edge and was unable to make it stick again - solved!
I would still like to use the 9v PSU but need to prevent the button, if it sticks again, from frying the solenoid
Hence this post ...
I thought that if i bought a 555 timer i could rig up a circuit that would allow a delay in the button pressses
So far, plenty of people talking about it but no solution ... that I can find
My QUESTION is thus:
What circuit would allow the following to take place?
A guest arrives at the house and presses the door bell button
The door bell rings
If the guest presses the button again, within a preset time of 10 seconds, nothing happens
After 10 seconds have passed, the circuit would allow the door bell to activate
Each time the button is pressed, one of two things happen
1 - The door bell rings and the timer starts again
2 - If the timer is still in the counting state, each button press or continuous depressed state would cause the timer to start again
SUMMARY
I have searched high and low but cannot work this out
I have lots of 555 timers and can obviously get extras parts as and when
My electronic ability is limited and I am not even sure that what I am asking is possible - although I am a fan of "nothing is impossible - EVERYTHING is possible"
Thank you one and all in advance for your help