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ALARM_FOR_DIGITAL_CLOCK

2017-01-07 19:41  
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ALARM_FOR_DIGITAL_CLOCK
Uses transistor as driver to turn on programmable unijunction transistor (PUT) oscillator feeding 8-ohm loud-speaker. Pitch of tone can be adjusted with 10 K pot. Input is from alarm pin of digital clock IC (pin 3 for Fairchild FCM7001 equivalent of Cal-Tex CTT001}. PUT is Radio Shack 276-119 or equivalent.-W. J. Prudhomme, CT7001 Clock-buster, 73 Magazine, Dec. 1976, p 52-54 and 56-58.