Tekky Wailing Siren Kit
KI0236
$11.95
| QTY | Price |
|---|---|
| 1 | $11.95 |
| 6 | $10.90 |
| 25 | $9.90 |
| 50 | $7.20 |
Description
In this Wailing Siren Kit, there are two oscillators: a simple two transistor "multivibrator" to flash the LEDs. Also a low-cost 555 Timer IC to produce the siren output to drive the speaker. The output of the multivibrator used to flash the LEDs is also used to vary the frequency of the 555 oscillator frequency. The 555 IC Output then drives the speaker. This is how we create the two tones that the 555 IC produces. As the two-transistor multivibrator goes from a red to green LED the DC voltage on the input to the 555 changes. This produces a wailing sound.
Included
470R 0.25W 1% Resistor (Yellow, Purple, Black, Black)
100K 0.25W 1% Resistor (Brown, Black, Black, Orange)
10K 0.25W 1% Resistor (Brown, Black, Black, Red)
150R 0.25W 1% Resistor (Brown, Green, Black, Black)
.01uF, (10nF) 100V Poly/Green Cap
22uF 100V RB Electro Capacitor
1000uF 16V RB Electro Capacitor
555 Timer IC
1N4004 1A Silicon Diode
TO-92 BC337 NPN Transistor
57mm 8 ohm 0.5W Speaker
9V Battery Snap
10cm Speaker Wire
Resources
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All prices are in Australian Dollars and include GST. GST will be removed from your order if you are ordering from outside Australia.
Products may differ from pictured.
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Tekky Wailing Siren Kit
KI0236
$11.95
| QTY | Price |
|---|---|
| 1 | $11.95 |
| 6 | $10.90 |
| 25 | $9.90 |
| 50 | $7.20 |