OT: Electronic circuit help

[John Bennett]

Hi

Can any one help with the design of a circuit to do this?

Input 1 Input 2 L.E.D
0 0 off
0 1 on
1 1 on for 3 seconds then off

Rob

DATA Imported from archives: originally posted by Rob Walmsley (rob@walmsley.ws)

 

[MikeDX]

What happens when Input 1 is active and Input 2 is inactive?

On 28/07/06, Rob Walmsley <rob@walmsley.ws> wrote:
>
> Hi
>
> Can any one help with the design of a circuit to do this?
>
> Input 1 Input 2 L.E.D
> 0 0 off
> 0 1 on
> 1 1 on for 3 seconds then off
>
> Rob
>
>
>
>

 

[Guests]

What are the input/Output levels and currents ? Eg..Do you need closed contacts on the outputs or sink or source drivers ?

Are the inputs relatively slow changing or are they microsecond blips ?

I'd proly go with an 8 Pin Pic chip and some software.

Cheers, Col

 

[dz1n3]

Oi If you think we are gonna do your fucking home work from school you
can fuck right off.

You wont learn by asking others, plus could be classed as a form of
cheating.

Oh well the world could do with another wanna be cleaner on £4 an hr.

You TIT!!!

D!

Rob Walmsley wrote:

>Hi
>
>Can any one help with the design of a circuit to do this?
>
>Input 1 Input 2 L.E.D
> 0 0 off
> 0 1 on
> 1 1 on for 3 seconds then off
>
>Rob
>
>
>
>

__._,_.___
Messages in this topic (3) Reply (via web post) | Start a new topic

 

[Outrun]

Friday again eh?

 

[martincoombs2002]

harsh but true . look in a book and learn

 

[cliff_poole]

Rob,

If -

Input1 Input2 LED
1 0 on

Then you will need an OR gate, for the 1 1 you will need an AND triggering a
555 timer in monostable mode. For more info on that I just Googled this
http://www.doctronics.co.uk/555.htm#monostable . You will need the trigger
network shown further down the page.

What is it for out of interest ?. Is it a control cludge to JAMMAtise a
game with a special controller ?. I once sketched out a joystick hack for
Defender that used a monostable circuit like that for the reverse direction
button, never got around to trying it though.

Cliff.

 

[Macro]

or cheat, and use an MCU - program it to do what you like then

probably cheaper than an NE555 and some AND gates as well

Cliff Poole wrote:
> Rob,
>
> If -
>
> Input1 Input2 LED
> 1 0 on
>
> Then you will need an OR gate, for the 1 1 you will need an AND triggering a
> 555 timer in monostable mode. For more info on that I just Googled this
> http://www.doctronics.co.uk/555.htm#monostable . You will need the trigger
> network shown further down the page.
>
> What is it for out of interest ?. Is it a control cludge to JAMMAtise a
> game with a special controller ?. I once sketched out a joystick hack for
> Defender that used a monostable circuit like that for the reverse direction
> button, never got around to trying it though.
>
> Cliff.
>
>