LM3900 Positive Differentiator (CB5054E)

The circuit shown in the figure has an output voltage rise time of 0.22 ms and an input time constant of approximately 1 ms.

Multi-Pass Filter with Multiple Feedback MC1776 (CB4499E)
The integrated circuit used in this filter is not very common today, but the configuration can be implemented...
Regulator with Shutdown LM317 (CB15315E)
This circuit can be controlled by a TTL signal. The signal can come from common logic or from the...
Robot seeks light (CB25002E)
This interesting circuit is for controlling a small robot that searches for a light source. The...