At the moment I press to switch on, count to 10 and press again to switch off; hence delivering an approximately 10 second long 12 volt DC signal (~10mA current) to a relay on an old push-button telephone (I know it sounds like a weird thing to do on its own but it does have a useful function to do with diverting my telephone calls remotely and which Im happy to explain but would take up too much space here).
What I would like to be able to do is to press a switch to start the signal and then be able to leave it knowing that, after approx 10 seconds, it will turn itself off automatically so I dont have to wait around for 10 seconds (Im a type A personality it would seem)!
What circuit/components would I need to achieve this please?
Do ask for more information as needed and apologies if what Ive explained thus far is as clear as mud!
I have an elementary knowledge of DC electronics, basic circuit assembly skills and many errors to my credit. Im really willing to learn the how to with the theory and practice but I dont know where to start with this one!
Many thanks in anticipation of your help
Tim
What I would like to be able to do is to press a switch to start the signal and then be able to leave it knowing that, after approx 10 seconds, it will turn itself off automatically so I dont have to wait around for 10 seconds (Im a type A personality it would seem)!
What circuit/components would I need to achieve this please?
Do ask for more information as needed and apologies if what Ive explained thus far is as clear as mud!
I have an elementary knowledge of DC electronics, basic circuit assembly skills and many errors to my credit. Im really willing to learn the how to with the theory and practice but I dont know where to start with this one!
Many thanks in anticipation of your help
Tim
Your manual switch will provide the trigger. You'll choose a resistor+capacitor to give the timing you want.
