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a question about making a circuit?
I was wondering If anyone had an Idea of a circuit i could make, using stuff from radio shack,
a circuit that used a momentary usually off button so that on the first and second press it would momentarily start the device at the end of the circuit (in this case a motor), and on the third it would also momentarily activate the same device but then close the circuit. The circuit would probably also bee run by another usually closed button that you would hold down during this sequence and when released would reset the circuit.
the only problem is (Unless the whole thing is a bad idea XD) I thought of using relays but all my ideas just had all the relays activating themselves when the button was first pressed.
I though a capacitor might help in some way but I don't know how to use a capacitor XD . If it really does fill up with X amount of electricity then shuts off or powers on (I never got witch) then maybe I could use it so that it would be full after three button presses (though I;d have to find a way to discharge it...)
So if any of you had any idea on what I should do I would be grateful for advice :D
Thanks.
I have a horrible memory for these things and with the holidays around the corner it might get worse so if I end up forgetting thank you for you answers so far especially CWCc. I goggled electronic counter after he used it in a sentence and designed (as in not made and tested yet so if it doesn't work out I will defiantly keep arduino in mind.) but I found out how to use a jk fliflop as a counter and that might make the circuit work, (it works in theory but who knows how it will actually work in practice. Thanks for the help I'll try to post the working circuit if this works and keep the answer open for as long as possible to generate new ideas just in case. THANKS!
2 Answers
- CwCcLv 77 years agoFavorite Answer
You want something like this.
Whenever you have a circuit with a push button hooked up to digital logic, you need a debouncer. The debouncer cleans up the output waveform of the button, which is usually very messy due to "bouncing" of the contacts. You need to hook up some sort of counter to the debouncer so you can count the three presses, and when you reach three, you want a relay to short out the button to keep the device on. This sort of thing is very difficult to build from scratch using analog devices, so you'll probably want to use a couple of digital ICs. Like the other responder said, an easy solution is to use a microcontroller in place of the debouncer/counter, since it can be programmed to have those behaviors without much effort. Using a microcontroller has the added benefit of introducing you to programming and showing you how to do a great number of really, really cool projects.
- AlienRelicsLv 57 years ago
Whatever circuit you use, relays are probably how you'll drive the motor and close the other circuit.
I'd start with an Arduino. You can buy them at Radio Shack. Learn how to program them, and you can make your circuit do just about any combination of button presses and actions based on them.
Source(s): http://www.arduino.cc/