Found in a modern design book with tubes, this stage with the triode 37 has a plate current of 3.7 mA.
This simple CMOS touch switch was obtained in a 1987 publication. All components are common and the...
The sensor in this circuit is a BA315 diode. Other diodes can be experimented, but this is one...
This circuit uses 80's operational, which are not easily found today. The circuit is from a...