Manually Triggered VCO 4046 (CB25758E)

We found this circuit with the CMOS4046 in the August 1994 Electronics Now magazine. The circuit is activated by pressing switch S1.

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Gain 100 Instrumentation Amplifier 2 (CB15878E)
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50 ohms Line Amplifier LM3900 (CB15257E)
Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found...
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