Motion Detector (CB6662E)

This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon integrated circuit today.

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AC Analog Voltmeter (CB14966E)
This circuit measures alternating voltages on 5 scales and its accuracy depends on the tolerance of the...
Programmable Gain Operational (CB18630E)
This circuit was obtained in an American documentation translated in the 80's. The circuit can be...
Sine Wave Oscillator Using an lnverter ll (CIR098E)
Figure bellow shows another configuratíon for a Iow-frequency sine wave oscillator using CMOS...