This circuit was found in Philips documentation from 1967. The components are of the time, being transistors like BCY38 for TR1, BC108 for TR3, and others depending on currents.
This circuit is from an old documentation. Integrated circuit 723 is not common today. The power...
This small receiver for the medium wave range was found in Radio Electronics magazine from July...
This astable multivibrator configuration causes two LEDs to alternately flash at a frequency...