Linear photometer (CB7366E)

This circuit was found in a 1967 Philips publication. Transistors support equivalents and modern equivalents can be used.

Square Triangular Oscillator (CB24025E)
This circuit can be used in a toy organ. The frequencies are determined by the capacitors selected by...
OPA1612QDRQ1 Audio Amplifier (COM007E)
May 2016 - Mouser Electronics is sourcing the new high-performance audio amplifiers with bipolar...
Controlled gain amplifier TBA400 (CB21886E)
This circuit was obtained from the 1976 Siemens Integrated Circuits Manual. It is the circuit for...