The TAA300 integrated circuit is not common today. In fact, the circuit shown is from a Dutch Philips documentation from 1969. The output is 8 ohm speaker and 9 V power supply.
This circuit was obtained from a Popular Electronics of 1994. The magazine no longer exists in its...
We found this circuit in a 90's Radio Electronics. The low power circuit activates a 12 V relay...
This circuit was found in a 1969 Ferranti documentation. It can be implemented with modern...