The coil and sockets of this circuit found in a QST depend on the frequency band that is intended to be tuned.
This traditional version of a double time constant dimmer using triac is from the 90s...
This circuit was found in the ON Semiconductor's Thyristor manual of the 1980s. The high quality...
August 2017 - This Maxim component, available from Mouser Electronics, is ideal for wearables,...