Partlist for the Microcontroller bases DC power supply
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Parts for main board:
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Capacitors:
C1 27pf
C2 27pf
C3 10uF
C4 10nF
C10 10nF
C11 1nF
C12 10nF
C13 100p
C14 100p
C18 0.1uF
C20 0.1uF
C21 0.1uF
Biased Capacitors (16V unless otherwise stated):
C15 1000uF, 25V
C16 100uF
C17 470uF, 25V
C5 1uF
C6 1uF
C7 1uF
C8 1uf
C9 10uF
C19 10uF
Semiconductors:
D1 4.3V ZENER-DIODE
Z-DIODE 4.7V ZENER-DIODE
D2 1N4148
D3 1N4148
D4 1N4148
D7 1N4148
D5 1N4001
D9 1N4001
IC1 AT90S4433P
IC2 MAX232
IC3 7805 Voltage regulator
IC4 TL081P or TL071
IC6 TL082P or TL072
T1 BC547 transistor-npn
T3 BD379, TO126 transistor-npn + small aluminium metal sheet
for cooling (2 x 4 cm is sufficient)
T4 BC557 transistor-pnp
LCD display 2 lines with 16 or 20 characters, HD44780 compatible.
LED red
LED green
Q1 4.0MHz crystal
Resistors:
R24 100
R41 100
R10 10k
R14 10K
R20 10k
R21 10k
R25 10K
R9 10k
R4 1.8k
R40 1.8k
R19 1k
R7 1k
R8 1k
R17 1M
R34 1M
R12 220
R23 2.2k
R28 22k
R30 22k
R6 22k
R15 27k
R26 2.7k
R32 2.7K
R1 470
R11 470
R13 470
R3 470
R16 47k
R18 4.7K
R2 47k
R22 4.7k
R27 4.7k
R29 4.7k
R31 4.7k
R39 47k
R5 4.7k
R38 33k(if Imax=3A), 120K(if Imax=2.2A)=> depends on
the transformer used for the power part.
Mechanical parts:
Mini stripe connectors for the programmer cable.
Bannana connectors
power connector
RS232 connector (female)
7 small push buttons
power on/off switch
Transformer 9V, 100mA
IC sockets:
2 x 8pin
1 x 16 pin
2 x 14 pin (or 1 x 28 pin 7.5mm, for atmel cpu)
Parts for power part:
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option 1)
0-16V Imax=2.2A
-> transformer 15V 2.5A
option 2)
0-24V Imax=2.2A
-> transformer 24V 2.5A
option 3)
0-30V Imax=3A
-> transformer 30V 3A
C1 10uF, 63V
C2 4700uF, 63V
C3 0.1uF
Diodes: 6 x 1N5400 or SB350
R1 6.8k
R24 5.6k
T1, T2: 2N3055 or BD745 or BD743
(for option 3 take 2N3055, for all
others take any of the 3 transistors)
Note: make sure that the power transistors have a current amplification
factor (known as hfe) of 30 or higher. Modern multimeters can measure the
hfe. It's a good idea to take such a multimeter and 3 cables with you to
the shop and measure the hfe before you buy the transistors.
R25 8 x 2.2 Ohm 1/4W
R18 4 x 1 Ohm 1/4W
R19 4 x 1 Ohm 1/4W
Very big aluminium cooler, about 1.5 K/W
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