This circuit aims to increase the selectivity of receivers whose FI is 455 kHz. The circuit is from 1975 documentation. The transistors can be the modern BF494 equivalents.
This circuit can be used with high power LEDs supplying currents from microcontrollers and digital...
The integrated circuit used in this regulator is not common today. The circuit is from a technical...
We find this circuit in an 80's EDN. The circuit can be used with equivalent operational,...