The circuit presented is from 1994 and can be developed with more modern operators. We found the configuration in the National Semiconductor Linear Applications Handbook.
This circuit was obtained from an English magazine from 1976. The circuit operates two LEDs and...
Found in a publication from the 60's, this power supply has no regulation, but only current...
This circuit can use the LM148 and its more modern equivalents, generating a sinusoidal signal whose...