False alarm (CB6775E)

This circuit was found in a 90’s Electronic Design. The circuit uses components that are still common in the market and indicated for use in the car.

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Tape preamplifier (CB20575E)
With NAB equalization we found this circuit in an English documentation from 1967. The transistors used...
Cascading the 4017 (CB211)
Here we show how two 4017s can be cascaded to count above 10. The circuits are driven by a square...
Second Order Unity Gain Filter (CB25817E)
Using a 741 op-amp this circuit high-pass to 10 kHz was found in the February 1995 issue of...