Found in a magazine 73 for radio amateurs, this circuit makes use of general purpose transistors and the integrated circuit is still easily found.
This circuit was obtained in an 80's documentation, making use of a 3-terminal regulator of the...
August 2017 - STMicroelectronics' new T850 switches with triacs up to 8 A can be obtained from...
We found this circuit in a Japanese 1968’s documentation. The circuit makes use of transistors from...