Found in the documentation on PCs, this circuit excites LEDs whose current is determined by R3.
We found this circuit in a 1979 Poptronics. The coil is formed by 5 turns of wire 28 in an...
This circuit has a high input impedance and provides a good signal at its output. The power must...
This power supply has a resolution of 10 pA in the current range from -100 to +100 nA. The circuit is...
