Phototransistor Optical Ttrigger (CB14648E)

This configuration was found in the Texas Instruments optoelectronics manual. PNP transistors support equivalents and the phot transistor does.

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Variable Filter (CB24389E)
This variable filter circuit was found in July 1975 Radio Electronics magazine. The circuit uses 3...
Unit Gain MOSFET Amplifier (CB6128E)
This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is...
Night light (CB6859E)
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