This circuit was found in a 90s Silicon Chip documentation. The current of the transformer is 1 A maximum, a value given by the integrated circuits used.
Found in an EDN from the 90's this circuit makes use of unusual components today. | Clique na...
Two tone siren (CB9085E) This circuit was found in a 1980’s Radio Electronics. The signal must be...
We found this circuit in a 1986 documentation, however, by the components used it can still be...