1955 Photocell Alarm

1955DecRadioElec

Sixty years ago, this kid’s electronic expertise was no match for Santa. The cover of the December 1955 issue of Radio Electronics. ┬áThe youngster had constructed the transistorized photocell alarm (using a CK722 transistor) from the plans contained in the issue. ┬áBut he failed to outwit Santa, as shown in this photo.

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