Game show circuit

It is such an engaging way to get the kids working with circuits. Home About Blog Help Shop. Make sure to print this on card stock. You can also cut a lot of the tin foil strips very easily and quickly using a paper cutter. Have the students hole punch on the circles with the dotted lines. Avoid SCRs that trigger with s of microamperes; you want a gate trigger current of a few mA or else you will have trouble with more than one light coming on at once.

A low value resistor, perhaps ohms may be added from gate to volts to reduce false triggering. In fact, the two types of devices could probably be mixed if that is what the junk box has to offer! But not sensitive gate types! The zener is an ordinary 9 volt, 1 watt type like the 1N The entire circuit may be built into one box with two wires running out to each contestant's pushbutton switch or the SCR, lamp, and switch may be in a remote box for each contestant with three wires running back to the base unit.

Many more than three contestants may be added by repeating the pattern. The following pictures are only to show the wiring for those not familiar with schematics. This prototype is not a good way to build the game! Here is what you see: The three lower lamps are soldered directly to the MT2 terminals of triacs anodes if SCRs are used.

The gate leads on the left connect to the pushbuttons red wires and the other end of the pushbuttons all go to the resistor-zener junction white wires. The ohm resistor is the tiny brown part and the zener is the silver part. The brown wires connect the MT1 terminals cathodes to the negative battery wire. Reactions: Markyyyy. More resources from crutschow Resource icon. Resource icon. Latest threads J. Started by jani12 Today at PM Replies: 0. General Electronics Chat.

Repairing Electronics. What is the alternate for 2. I can't seem to find these capacitors? Started by M. Joshi Yesterday at PM Replies: The Reset inputs are held low with a pulldown resistor, and will reset when the input is brought high. Locking out other players when one button is pressed is done by first sending the clock input through an dual input AND gate.

The second input of this gate for each player is tied to the output of a quad input AND gate, whose inputs are driven through Q' from each flip flop. Thus, when one player buzzes in, his Q' will go low, all the AND gates will prevent input to any clock, thus effectively locking everyone from changing the state.

The parts I used are listed below, including part numbers from Digikey. What's missing from this list are some 6" servo extender cables that I had on hand. Join the discussion More information. More resources from djsfantasi Resource icon. Latest threads J. Started by jani12 Today at PM Replies: 0.

General Electronics Chat. Repairing Electronics. What is the alternate for 2.