This excellent tube preamplifier was found in Radio Electronics magazine from July 1958. The power supply was not included. The circuit has several inputs.
In the figure we have the simple way to obtain an integrator with a type 741 operational...
The CMOS 4060 integrated circuit consists of a frequency divider counter with internal elements...
This circuit was found in a French documentation from the 80's. The circuit must be powered by a...