This adjustable circuit from 0 to 200 nA was found in a 90's EDN. The components can still be found relatively easily, as they are CMOS.
This low voltage AC control uses a triac. Any TIC series triac can be used and this device must be...
This circuit was found in a 1987 magazine. It measures the pulse rate produced by a cardiac...
The field effect transistors have characteristics that allow the realization of excellent...