This circuit that draws 1 out of 8 LEDs was found in an 80's American documentation. The circuit can also work with an astable using the 555 instead of the 4046 which is not a common component today.
The circuit we use makes use of Linear Technology's LT3080 (www.linear.com) which consists of a...
This circuit is from Popular Electronics from the 90s. The integrated circuit is not very common...
This traditional triac power control circuit can control loads up to 1000 W. The triac must be...