SNAP CIRCUITSTM - Carl's Electronic Kits
SNAP CIRCUITSTM - Carl's Electronic Kits
SNAP CIRCUITSTM - Carl's Electronic Kits
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Project #238<br />
Trombone<br />
OBJECTIVE: To build an electronic trombone that<br />
When you turn on the slide switch (S1) the trombone should start playing.<br />
To change the pitch of the note, simply slide the adjustable resistor control<br />
(RV) back and forth. By turning the slide switch (S1) on and off and<br />
moving the slider, you will be able to play a song much like a trombone<br />
player makes music. The switch represents air going through the<br />
trombone, and the control is same as trombone slider bar. The circuit<br />
may be silent at some positions of the resistor control.<br />
Project #239<br />
Race Car Engine<br />
OBJECTIVE: To show how changing frequency changes<br />
Use the circuit from Project 238 shown on the left, but change the 0.02µF<br />
capacitor (C1) to a 10µF capacitor (C3). Make sure the positive (+) mark<br />
on the capacitor is NOT on the resistor (R2) side when you snap it in.<br />
When the switch is turn on, you should hear a very low frequency<br />
oscillation. By sliding the adjustable resistor control (RV) up and down,<br />
you should be able to make the sound of a race car engine as it's motor<br />
speeds up and slows down.<br />
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