Solar timer (CB20498E)

This very low consumption circuit can be powered by a solar cell. The time indication is given by a microammeter.

3-Stage Level Indicator (CB24561E)
Using the Texas Instruments SN75489P this circuit was found in June 1978 Radio Electronics...
Soft shutdown with TDA1185A (CB14542E)
We found this circuit, which should only be used with incandescent lamps. In the Motorola Linear...
Composite bridge amplifier (CB6986E)
Found in Electronics Now from the 1980s, this amplifier can also be seen in commercial amplifiers...