Found in a 1990s US publication, this alarm circuit detects when a light beam is interrupted. Optical resources may be used for the sensor and instead of the alarm a relay may be used.
) Found in a 90s Linear Technology documentation, this circuit is a fading of video signals and...
This tuning-free circuit was found in an old operating amplifier manual. The setting can serve as...
This circuit was found in the Spanish magazine that no more existis Mundo Electrónico, in a...