Circuit Miscellany
To conclude this ‘Pocket Book’, this final chapter presents a miscellaneous collection of useful digital IC circuits that do not readily fit under any of the specific classification headings of earlier chapters. These circuits include alarm-call generators, security alarms, DC lamp controllers, and some unusual designs based on the 4046B ‘phase-locked loop’ IC, plus a CMOS 6-decade (1Hz to 1MHz) crystal calibrator circuit.
Alarm-call Generators
Inexpensive CMOS logic ICs such as the 4001B can easily be used (in conjunction with one or more transistors) to make a variety of audible-output alarm-call generator circuits. These generators may give monotone, pulsed tone, or warble tone outputs, may give latching, non-latching, ...
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