Found in a 90s Linear Technology documentation, this circuit is intended for powering cold cathode fluorescent lamps. The circuit has an input voltage from 4.5 to 20 V.
We found this circuit in an 80's Radio Electronics. The circuit uses a PTC sensor and an LED...
In this circuit a 12 V lamp or LED blinks with the music signal applied to the input. R depends on...
Using a period sensor, this circuit was found in the February 1986 issue of Radio Electronics...