Found in 1969 Ferranti documentation, this small font is characterized by its low ripple. Transistors can be common for general use, due to the low operating current.
This dual adjustable power supply was found in the June 1990 issue of Radio Electronics magazine....
We found this simple alarm circuit in a 1986 documentation. The circuit uses sensors of the NA...
This circuit, from a 1973 documentation, can be made with BC549 transistors. The frequency depends on...