Vdeo cable driver (CB20922

This circuit was found in documentation from the 1980s. The integrated circuit used is not very common today.

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Light Controlled Oscillator (CB16728E)
This is yet another version of the light-controlled oscillator that can be found on this website. This...
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Originally created to feed the filaments of a 12AX7 as an audio preamplifier to eliminate the...
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The incidence of light in the LDR causes this circuit to start operating, emitting a sound whose...