Light Sensitive Timer (CB24796E)

This circuit was found in the April 1984 issue of Radio Electronics magazine. The circuit directly drives a TRIAC to a high-power load.

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Time delay (CB23969E)
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427 to 439 MHz booster (CB7438E)
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This amplifier has a few Watt output, using old transistors. The speaker is 45 ohms, but with...