Hello,
I am building an electronic quiz board for our local County Park for junior rangers. I have built a few previously that work on the basic concept and are easy to wire. Unfortunately I am being asked now to incorporate a "wrong answer" indicator on the board as well. A Green LED lights up if they are right and if they are wrong, a red led lights up. Needless to say this is a little more complicated using simple contacts and jumpers. The board has two magnetic pens tethered using wires. One pen is connected to 5v+ and the other pen is connected to 5v-. When the pen touches the two pads that are connected on the back, the answer is correct, the circuit is complete, and the green LED lights. When the pen touches pads that are not connected nothing happens. Instead of nothing happening, they want a red LED to light.
. I am posting an example of one of the existing quiz boards. Can someone lend some insight on the easiest way to make this happen outside of using ICs? I was hoping this could be done using just diodes and relays, but I have exhausted my knowledge on the subject.
Thanks,
Jimmie
I am building an electronic quiz board for our local County Park for junior rangers. I have built a few previously that work on the basic concept and are easy to wire. Unfortunately I am being asked now to incorporate a "wrong answer" indicator on the board as well. A Green LED lights up if they are right and if they are wrong, a red led lights up. Needless to say this is a little more complicated using simple contacts and jumpers. The board has two magnetic pens tethered using wires. One pen is connected to 5v+ and the other pen is connected to 5v-. When the pen touches the two pads that are connected on the back, the answer is correct, the circuit is complete, and the green LED lights. When the pen touches pads that are not connected nothing happens. Instead of nothing happening, they want a red LED to light.
Thanks,
Jimmie
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