High impedance stage (CB20564E)

This high input impedance amplifier stage was found in a 1963 documentation. The transistor germanium of the time.

UJT Electronic Organ (CB1435E)
We find this simple musical instrument in a 1977 Radio Shack documentation. The key resistors must be...
0.6 to 3.3 V x 80 mA Regulator NCP171 (CB4736E)
a This very low voltage regulator supports input voltages from 1.7 V to 5.5 V and is suitable for IoT...
Programmable Regulator TL431 (CB4640E)
The TL431 integrated circuit consists of a programmable shunt regulator with an internal...