This circuit is from 2005 documentation. The integrated amplifier circuit must be mounted on a good heat sink and the speaker must be able to withstand the full power of the circuit.
This two-channel wired intercom was found in the April 1990 issue of Radio Electronics magazine....
The voltage of this symmetrical power supply depends on the regulating integrated circuits, which...
A staircase signal is produced by this circuit using a TTL IC and an operational amplifier. The...