Half Wave Rectifier Circuit; Half Wave Rectifier Circuit (Ii); Led Vs. Diode; Current & Resistance - Elenco Electronics Snap Circuits 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 secondary. Place the meter (M2) across
points A & B, then turn on the switch (S1).
The needle should be below the 5 scale, 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) to the
secondary. We can measure the DC voltage on the transformer's
secondary using a resistor (R4), a diode (D1), and an amp meter (M2).
Turn on the 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 across the diode is less
than the voltage 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 10kΩ (R4) resistor to a 5.1kΩ
(R3) and turn on the switch (S1). You will see
that decreasing the resistance increases the
voltage across the meter (M2).
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