The difference between this circuit and the previous one is that it uses PNP transistors. The circuit is from Radio Electronics magazine from July 1968. The frequency depends on R1 and C1.
The audio amplifier presented can use speakers from 8 to 16 ohms, with a power supply from 4.5 to 15...
This 2003 application consists of showing how a computer CD-ROM can be used to play audio CDs in a...
This circuit operates according to the same principle as the previous one, but it has a difference in...