Pulsed Light Alarm (CB6439E)

This circuit provides a high intensity pulsating signal to a speaker. The circuit is from an American 90's documentation. The power supply is 12 V.

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Active Inductor (CB5342E)
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0.5 W Transistor Audio Amplifier (CB233E)
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One Transistor MW Receiver (CB943E)
This circuit uses one of the first commercial transistors, availble in 1958, year of the...