This low power circuit can be powered with voltages from 1.8 V. We find it in a 80s Hands On Electronics. The load can be from 8 to 32 ohm.
This circuit was found in Italian magazine (1988), but can be mounted with ease even with the...
In the figure we have a simple shield of 1 transistor. The supply voltage depends on the relay. The...
The operational 714 (not the 741) is an old Raytheon type that is no longer common today. The...