This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is intended for loads controlled by triac and the resistors depend on the desired control.
This very interesting project was obtained in a 1980 publication. It consists of a device that is...
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...
This circuit for a frequency of 10 kHz was found in an Electronic Design. It makes use of a tunnel...