window comparator help

[mytholibar]

I'm struggling on window comparator circuits.

I'm trying to build a game circuit that uses 6 wires. Each wire must go from point A to point B, C to D, E to F, ect. and only that wire can go in that relationship so if A to C nothing happens.

I thought a window comparator would have been the trick to make this work. using a voltage split and a lm324 but I can't get the lm324 to work properly. If anyone is interested I'm game for some assistance.

Thanks

 

[(*steve*)]

Why not a battery, a resistor and a LED connected between A and B, and another between C and D, and so on. Connecting a wire between A and B will complete the circuit and light the led. Or connections between A and other points won't work.

OK, the problem here is that a wire from A to D, and one from B to C will light both LEDs. You can get around this by using a 4017 to both provide power to A, C, E, and so on in turn, whilst simultaneously enabling a MOSFET which connects the led to the other of each pair. The 4017 needs to run fast enough that your eye can't see flicker (1kHz should be fine).

 

[AnalogKid]

What is the power source for the game? How many of the wires can be installed at the same time, correctly or incorrectly?

You are correct, a group of window comparators might be a solution, but there is no way to know without more information. For example, if A, C, E, G, I, and K are set to 1.5 V, 2.5 V, 3.5 V, etc. and the window comparators are set to B: 1-2 V, D: 2-3 V, F: 3-4 V, etc., then cross connecting inputs and outputs will not produce winning results incorrectly.

Please post your schematic.

ak