10-Step Sine Generator (CB24472E)

This CMOS generator with the 4018 IC was found in a November 1976 Radio Electronics magazine. It uses a 741 op-amp as the audio amplifier.

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The Cervejodino receiver (CB21631E)
The name of the receiver found in a March 1957 Popular Electronics comes from the fact that the...
Power Stage For Stepper Motor ULN200x (CB11863E)
This is the basic configuration for using the ULN2001 and MC1441 and others of the same series in...
Germanium Diodes Regulator Protection (CB12362E)
This circuit was obtained in a 1978 publication, but it can be assembled with equivalent...