Instructions

27
Circuit 3: Forward and reverse bias
Setup information
Install the two resistors and then the Schottky diode. Take note of the forward current (black ring) of the
diode. Then fit the jumper wire (Fig. 2.3) and connect the moving-coil instrument. Check the placement on
the board again and only then connect the battery.
Components required:
2 x 10 kΩ resistors,
1 x BAT 85 Schottky diode,
1 x moving-coil instrument,
1 x breadboard, 1 x 9V bat-
tery with clip connector
Fig. 2.3: Diode in forward
current
Experiment
Once the battery is connected, the moving-coil instrument deflects full-scale. The Schottky diode runs in
forward current; current flows from the positive battery pole through the resistors and the meter to the
negative pole of the battery. A counter-check, that is the diode in reverse direction, is coming next.
Setup information
Install the two resistors and then the Schottky diode. Take note of the forward current (black ring) of the
diode. Then fit in the jumper wire (Fig. 2.3a). Connect the moving-coil instrument. Check the placement on
the board again and only then connect the battery.