Driver for oscillograph (T459E)

This circuit from an old MIT documentation excites an oscillograph element, an old waveform viewer.

Delayed Alarm Trigger (CB4775E)
This circuit is designed to activate an automotive alarm after 8 minutes of activation. Of course...
TRIAC Test Using the Oscilloscope (MSB080E)
This circuit is used to test a triac and also to teach how it works. The load is an incandescent...
Tone Control (CB1590E)
This basic tone control circuit employs a Philips NE5538 operational amplifier, but can be adapted to work...