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Electronics => Electronics => Topic started by: icoms8 on November 05, 2008, 09:23:07 PM

Title: button action
Post by: icoms8 on November 05, 2008, 09:23:07 PM

how can i make a button with 2 pin send a singanl from the button to a 74LS241 20 Pin Dip IC MCU. I would like to find a program to make the MCU count like this (press the button 1 time and make a led display show 15)(press 2 times display 30) press 3 times display 40)(press 4 times display 1) repeat press  1-3) on the 6th press add one to the 5th press

Title: Re: button action
Post by: Razor Concepts on November 05, 2008, 09:29:10 PM

Try asking in an electornics circuits forum for this one.

http://www.aaroncake.net/circuits/counter.asp

If you want to do it in the way you described, it would probably be easier to use a programmable AVR or PIC chip.

Title: Re: button action
Post by: ArcMan on November 06, 2008, 10:03:13 PM

So true.
It's really hard to justify NOT using a uC in a project any more.  It doesn't even make sense to use a 555 timer when an 8-pin uC can do it better and with a simpler circuit.

Title: Re: button action
Post by: Admin on November 08, 2008, 02:38:01 AM

Quote

how can i make a button with 2 pin send a singanl from the button to a 74LS241 20 Pin Dip IC MCU

Why that particular MCU?

You can source code for it already? Its fairly simple - set up a pin as a digital input. When the button is pushed, your code will add to a variable.