Automatic TV power off (CB5945E)

This 80's circuit turns off a TV or other appliance after a set time. The base is a 555 IC and the relay is according the supply.

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Distribution Amplifier (CB4922E)
This amplifier is from a 1990s Linear Technology component manual. The circuit requires...
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We have in the figure a traditional amplifier configuration with operational amplifier. The source...
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This circuit was found in an 80's Electronic Design. The frequency depends on the crystal and the...