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The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.122.
2.57 Voltage multiplier passive
Circuit 123: Voltage doubler with moving-coil instrument
Setup information
Install the two diodes, the two electrolytic capacitors and the resistor as shown in Fig.
three jumper wires. Check the placement on the board again. If you are familiar with the relevant safety
guidelines as per VDE and know how to observe them when working with devices that are to be connected
to the mains, you can now connect the transformer.
Experiment
If everything is wired correctly, you can safely go ahead and connect a low-power AC voltage source. Ideally,
this is a 4.5 V bell transformer. The needle of the moving-coil meter is clearly in motion. If you check again
using a multimeter, you will see that the voltage at the output is about 8 V DC. Now you know how easy it
is to double the value of an AC voltage.
The circuit diagram for this experiment is shown in Chap. 3, Fig. 3.123.
148
followed by the
2.123
Components required:
2 x 1N4148 silicon diodes,
1 x 22 kΩ resistor,
2 x 10 μF electro-
lytic capacitors,
1 x breadboard
Fig. 2.123: Voltage doubler
with moving-coil instrument
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