Half Wave Rectifier Circuit; Half Wave Rectifier Circuit (Ii); Led Vs. Diode; Current & Resistance - Elenco Electronics Projects 306-511 Instruction Manual

Project #343
Project #344
Half Wave
Rectifier
Circuit (II)
OBJECTIVE: Measure the voltage using the
center-tap.
Use the circuit in project #343. Now see what
happens if you connect to the center-tap on
the side with more windings. Place the meter
(M2) across points A & B, then turn on the
switch (S1). The needle should deflect less,
about half as much as project #343. As you
use less windings, the output decreases.
OBJECTIVE: To build a half wave rectifier circuit.
A rectifier changes an AC voltage into a DC voltage. A diode (D1) is
used because it allows current to flow in only one direction, for one
polarity of applied voltage.
generates an AC voltage across the transformer (T1).
measure the DC current from the transformer's output using a resistor
(R2), a diode (D1), and a meter (M2). Set the meter to the LOW (or
10mA) scale. Turn on the slide switch (S1), the LED lights as the meter
points past the 5 scale.
Project #345

LED vs. Diode

OBJECTIVE: To see the voltage difference
between an LED and diode.
Use the circuit in project #343. Replace the
LED (D1) with the diode (D3) and turn on the
switch (S1). The needle deflects higher,
because the voltage drop across the diode is
less than the voltage drop across the LED.
Half Wave
Rectifier Circuit
As the contacts open and close, it
Project #346
Current &
Resistance
OBJECTIVE: See how resistance affects
current.
Change the 1kΩ (R2) resistor to a 5.1kΩ (R3)
and turn on the switch (S1). You will see that
increasing the resistance decreases the
current through the meter (M2).
We can
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