This untuned (aperiodic) amplifier circuit was found in the August 1974 Radio Electronics magazine. The transistors are period, and the board layout is critical.
We found this circuit in a 1994 documentation. It can be implemented with the indicated...
This is the name of an interesting lighting effects device for discos, ballrooms or even shop...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...