Elenco Electronics rc snap rover Bedienungsanleitung PDF herunterladen (Seite 39)

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Project #80

OBJECTIVE: To show the power drop of components connected

in parallel.

Leave the fan off the motor (M1). Turn on the slide switch (S1), the

motor spins and the lamp (L1) turns on. Place the fan on the motor

and press the press switch. The lamp is not as bright now, because it

takes more power from the batteries (B1) to spin the motor with the fan

on it, which leaves less battery power available to light the lamp. If you

have weak batteries, the difference in lamp brightness will be more

obvious because weaker batteries don’t have as much power to

supply.

The speaker (SP) is being used as a low-value resistance here to

make the above effects more apparent.

Lamp, Speaker & Fan in Parallel

Project #81

OBJECTIVE: To draw an alarm activator.

Pencil Alarm

Pencil Alarm Variants

Project #82

Remove the jumper connected to point Y (as shown in the drawing) and connect it to point X instead.

Touch the loose ends to the pencil drawing again, the sound is different now.

Next connect a 2-snap wire between points X & Y connect the jumper to either point. Touch the loose

ends to the pencil drawing again, you hear a different sound.

Now remove the 2-snap wire between X & Y and connect it between X & Z, connect the jumpers to

W & Y. Touch the loose ends to the pencil drawing again, you hear yet another sound.

Now you can draw your own shapes and see what kinds of sounds you can make.

OBJECTIVE: To draw an alarm activator.

Build the circuit shown and connect the two jumpers to it, leave the loose ends of the jumpers

unconnected for now. There is one more part you need and you are going to draw it. Take a pencil

(No. 2 lead is best but other types will also work). SHARPEN IT, and fill in the shape below. You will

get better results if you place a hard, flat surface directly beneath this page while you are drawing.

Press hard (but don’t rip the paper), and fill in the shape several times to be sure you have a thick,

even layer of pencil lead.

Turn on the slide switch (S1) and take the loose ends of the jumpers, press them to the shape and

move them around over the drawing. If you don’t hear any sound then move the ends closer together

and move over the drawing, add another layer of pencil lead, or put a drop of water on the jumper

ends to get better contact.

WARNING:

Moving parts. Do

not touch the fan

or motor during

operation.

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