This circuit was found in Siliconix documentation from the 1980s. Equivalent operational amplifiers can be used and the output current is very low.
The integrated circuit used in this charger is not very common today. The circuit is from...
This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input...
This buzzer trigger can be used for small alarms. We find it in an 80’s American documentation. The...