Time base (CB8933E)

This circuit can generate time base signals from 5 to 1500 Hz. We find it in a documentation about old neon lamps.

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Voltage indicator (CIR22153E)
This circuit indicates whether the voltage to be measured is higher or lower than the zener diode...
Dual indicator (CB22136E)
Obtained from an English publication, this circuit actually needs a current limiting resistor,...
Constant Current Source (CB13073E)
Constant current sources are used in applications such as battery chargers, electrolytic tanks, etc....