Monostable 4047 (CB25123E)

This re-triggerable circuit was found in the April 1988 Radio Electronics magazine. Timings are given by R1 and C1.

Binary and Decimal Counter (CB17422E)
This didactic circuit was found in a 2001 documentation. It presents the result of programming in binary...
Variable Frequency Oscillator (CB22465E)
This VFO circuit generates signals from 2 Hz to 50 Hz. We found it in Popular Electronics from...
3-Tone Oscillator using the741 C (CB4426E)
This circuit can be used as a buzzer from 3 different locations, allowing you to identify where it went...