The circuit shown is from the 1994 Linear Applications Handbook by National Semiconductor. The maximum power is 7 W with a 8 ohms load and the power can be between 9 and 14 V.
The circuit presented is from the Linear Databook of Motorola of 1990. With it we emulated a NOR gate...
This circuit was obtained in a 1977 magazine, but it can still be assembled with BC548...
This circuit produces sounds that depend on the measured voltage and that can be compared with a...