Electronic Noisemaker; Electronic Noisemaker (Ii); Bee; Bee (Ii) - Elenco Electronics Projects 306-511 Instruction Manual

Project #399
Project #401

Electronic Noisemaker

OBJECTIVE: To make different tones with an oscillator.
Build the circuit and turn on the slide switch (S1), you hear a high-
frequency tone. Press the press switch (S2) and move the adjustable
resistor (RV) control around to change to frequency of the tone.
Replace the 0.1μF capacitor (C2) with the 10μF capacitor (C3, "+" on
the right) to lower the frequency of the tone.
Project #400

Electronic Noisemaker (II)

OBJECTIVE: To show a variation of project #399.
You can also change the frequency by changing the resistance in the
oscillator. Replace the 10KΩ resistor (R4) with the 100KΩ resistor
(R5), this can be done with either the 0.1μF (C2) or 10μF (C3)
capacitors in the circuit.
OBJECTIVE: To make different sounds with an oscillator.
Build the circuit and press the press switch (S2) a few times, you hear cute
sounds like a bumble bee. Replace the 0.02μF capacitor (C1) with 0.1μF
capacitor (C2) or 10μF capacitor (C3, "+" on the right) to change the sound.
Project #402

Bee (II)

OBJECTIVE: Show a variation of project #401.
Place the 0.02μF capacitor (C1) back in the circuit.
Remove the speaker (S1) from the circuit and place
the whistle chip (WC) across the transformer (T1)
at points labeled A & B on the circuit layout. Listen
to the sounds as you press the press switch (S2).
Replace the 0.02μF capacitor (C1) with 0.1μF
capacitor (C2) or 10μF capacitor (C3, "+" on the
right) to change the sound.

Bee

Project #403

Bee (III)

OBJECTIVE: Show a variation of project #401.
Replace the 100μF capacitor (C4)
with the 10μF capacitor (C3) or the
470μF capacitor (C5) to change the
duration of the sound. Use either the
speaker circuit in project #401 or the
whistle chip circuit in project #402.
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