Transistorized VU (CB21729E)

The instrument of this circuit can be a common microammeter. The circuit has its operating point adjusted in the trimpot.

Light intensity meter (CB7340E)
This circuit was found in a Philips documentation from 1970. The components are of the time,...
Pulse divider (CB6830E)
This circuit divides the frequency of a 2 kHz signal by 2. The circuit was found in Philips...
Wind Sound Generator (CB21346E)
This circuit was found in an English publication. The components are current, and the transformer must be...