LED ON and OFF with 2 Push button switches

[Willemdt]

Hi Guys thanks for all the inputs.
I actually need to use a pic like the 16f128 etc because the actual application has 4 inputs (in other words 4 inputs that will give me a 5v high signal independent from each other). Once any of these inputs are triggered a corresponding LED must then switch on.(in other words input 1 must switch on LED 1, input 2 must switch on LED 2, input 3 must switch on LED 3, input 4 must switch on LED 4) I then need to have 4 separate push button switches to cancel the corresponding LED's - one for each LED.
So I was trying to use the 12f675 just to see if I can get it to work with one push button as an input to switch-on a LED and then another pushbutton to switch-off the LED but am battling to get it right.
Any help will be appreciated

Thanks a lot

Willem

[HenrikOlsson]

Hi,

> Any help will be appreciated

In an effort help you understand what's wrong with your original code I tried to give you some advice in my previous response but apparently that didn't help, so....

For two buttons and one LED:

Main:

  If PB1 = 1 THEN   ' Button 1 is pressed 
    HIGH LED1   ' Turn on LED 1
  ENDIF

  IF PB2 = 1 THEN    ' Button 2 is pressed
    LOW LED1    ' Turn off LED 1
  ENDIF

Goto Main

That's it, rinse and repeat for as many buttons and LEDs as you want.

/Henrik.

[AvionicsMaster1]

I don't comprestand why you're using a PIC. Transistors or relays will be easier than a PIC for just switching on and off LEDs.

If you're stuck on using a PIC I'm betting you could use a 12F675 and I'm wondering if this will work. Why can't you make a voltage divider and set a pin at 1/2 of VDD which should be ambiguous with the port set to digital. Then you could monitor the same input pin for a high or low. This way you could use two pins for four inputs and have the other 4 outputs free for your LEDs. Well, you only need 3 ports to switch 6 LEDs but that's another thread.

Caveat is I've never tried it and wonder if it will work. If I get time I'll throw it together today and see if it works.