Voltage reference (CB20820E)

This circuit was found in documentation from the 1980s. The circuit can be designed based on modern components.

Second order filter with the 741 (CB12562E)
The filter shown in the figure can be implemented with general purpose amplifiers like the 741....
Metronome or Electronic Drum (CB10001E)
This circuit is from a year 2000 documentation. It generates pulses as fast as a battery or as...
Lamp Flasher LM3909N (CB4556E)
a This circuit was obtained from a 1978 Practical Wireless. It causes a low-power 1.5V lamp to...