This simple TTL siren was found in a 1980s Electronics Today International. The power supply is 5 V and the integrated circuit can be the 7400.
With this circuit it is possible to visualize the characteristic curve of a component on an...
This game of speed or who is the fastest uses a digital display. The circuit was found in a 1991...
This amplifier was found in a 1967 Japanese documentation. The circuit has no output transformer, but the...