Non Inverting Amplifier (CB6433E)

Based on an operational of the time, this Popular Electronics circuit can be designed with any equivalent operational.

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Positioning Control 555 (CB17243E)
In the figure we have a circuit that uses two 555 to control the positioning of a servo motor. The...
XTAL 20 MHz Sinusoidal Oscillator (CB14602E)
This circuit was found in the Linear Technology Applications of 1997. The circuit uses common...
Analog Multimeter N 201 (CB18869E)
This is the circuit of the N-201 commercial multimeter of the analog type. The circuit is from...