This circuit causes the powered lamp to fluctuate in brightness by 20% intensity. It can be used in other applications. We found it in the April 1998 Electronics Now magazine.
This circuit can be used to recognize a tone by its frequency. When this tone is present in a...
This circuit is from a 1975 amateur radio manual. The components can be approximated to the...
This circuit is from an English publication from 1976 but can be easily assembled with BC548...