This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
This siren was found in a 1980s documentation. The circuit makes use of very old operational that were...
This sophisticated circuit of the coin-toss game was found in an American 1980s documentation. The circuit...
By adding a transistor to the output and some polarization features we can obtain a higher output...