This circuit compensates for the brightness of an LED as a function of temperature. We found it in an Electronic Design from the 80s. The components admit equivalents.
The operational Amplifier used in this circuit is uncommon today. However, the same circuit can be...
This small blocking oscillator for approximately 1000 Hz was found in an American documentation from the...
We found this circuit in a Radio & Electronics Constructor from November 1975. The magazine no longer...