CMOS Stabilizer (CB8857E)

This circuit was found in a 90s EDN. In it we have the use of LEDs and diodes to stabilize the supply voltage of a CMOS load.

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Freezing Sensor (CB6048E)
This circuit was obtained from an 80's Electronic Engineering. The circuit detects ice formation...
Multi-Feedback Band Pass Filter (CB4025E)
This circuit is from the Motorola Linear Databook published in 1990. The circuit for 1 kHz can be...
Alarms Using SCRs (CB455)
In the fist circuit the alarm triggers on when any sensor is CUT. In the second circuit the alarm...