modified 11 years ago

Who can figure this out...

00:52:37

2 push button 3 leds.how can you make that 3rd led turn on without all three leds turning on  when either button is pressed and you can only press one button at a time. And this isnt a riddle I just need help lol

published 11 years ago

njolico

11 years ago

Either use an xor gate with the each input attached to one of the two button outputs, hence the third led will always be on when both of the first two leds are off and off when either led is on, or attach one of the switches to a counters up lead with one or both leds atatched to the first two outputs of the counter and the third output of the counter to its own reset in order to be able to cycle through the leds and be able to have them all off at the same time.

njolico

11 years ago

Ill post both examples.

njolico

11 years ago

Dont attach the third output to reset, forgot its in bcd. Attach an and gates inputs to first two outputs of counter and the and gate input to the reset lead.

lambchopx12

11 years ago

You could just put the third led after the first and second led, no need for other circuitry. Assuming, that is, that you have given all of the parameters, and the leds can light at 1v. Ill post my idea

Spreedator1000

11 years ago

Flip/flop circuit?

ollie

11 years ago

http://everycircuit.com/circuit/4886848044269568

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