Found in 969 documentation, this circuit generates sweep signals from 1 Hz to 100 kHz. The components used are from the period, and equivalents can be used.
This detector or window comparator was suggested by Harris in documentation from the 90's. The...
This circuit was found in a 90s Hands-On Electronics. When a signal appears at the headphone...
This circuit produces low power flashes in a LED. Frequency is adjusted by P1 and depends also on...