33
ELECTRIC POWER SUPPLY UNIT
1. CIRCUIT DIAGRAM
2. EXPLANATION OF CIRCUIT
• The primary voitage of the transformer sets RATING VOLTAGE, the secondary voltage of the transformer is full wave
rectified by use of the D2 (1N4003) & D3 (1N4003)
Vdd
42
C29
104Z
C22
470uF
16V
D5 IN4003
104Z
50V
C25
470uF
16V
+
–
+
–
C27
104Z
50V
C26
1000uF
35V
IC1
REGULATOR
7806
D3 1N4003
D2 1N4003
C28
104Z
50V
!
The gray & red (The waveform in secondary part of the
transformer)
@
Measuring the waveform in case of the removing
condenser by the removal ripple C26.
#
It is removed the ripple with attaching the C26 (1000
¥
F).
$
The waveform of output in the REGULATOR I.C. 7806.
%
The waveform after passing the D5.
f=50Hz or 60 Hz
Vpeak=11.4V
Vrms=8V
6V
0V
5.4V
0V
0V
12V
