Your Next Digital Project
Part
Description
Digi-Key Part #
IC1
ATmega8 microcontroller
ATMEGA-16PC-ND
IC2
74HC573 octal latch
TC74HC573AP-ND
IC3
74HC165 shift register
MM74HC165N-ND
IC4
75HC74 dual D flip-flop
MM74HC74AN-ND
OSC-1
16.0 MHz TTL oscillator
CTX196-ND
Q1
2N3904 NPN transistor
2N3904FS-ND
R1
1,000 Ω resistor
1.0KQBK-ND
R2
470 Ω resistor
470QBK-ND
R3, R4
1.5K Ω resistor
1.5KQBK-ND
R5
22 Ω resistor
22QBK-ND
R6
3.3K Ω resistor
3.3KQBK-ND
R7
10K Ω resistor
10KQBK-ND
C1
4. 7 µF electrolytic cap.
P973-ND
C2, C3
0.1 µF bypass capacitor
399-2155-ND
J1
14 pin header (7x2x.1)
103186-7-ND
J2
RCA video jack
CP-1403-ND
J3
Two pin header (1x2x.1)
103185-2-ND
J4
Three pin header (1x3x.1)
103185-3-ND
Note: All parts are available online from www.digikey.com
A preprogrammed ATmega8 controller ($9.99) and an etched
PCB ($19.99) are available from the author. Contact him via
Email: 65c02@softcom.net
Table 1. Parts List
These commands are always “mapped in” and available,
regardless of font or mode selection (see Table 2).
The primary font is enabled by using code $F2. The
extended ASCII characters can be printed by enabling
the Upper 128 mode ($F1). When the Upper 128 mode
is enabled, sending bytes from $00-$7F will generate the
corresponding graphics characters. Enabling the Lower
128 mode ($F0) will restore the standard ASCII characters. Since the first 32 bytes of the ASCII standard are non-printed control codes, some extra graphical characters
Figure 6
MAY 2004
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MicroChip PIC 18
• Supported models of the PIC 18 includes PIC18F242, PIC18F252,
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Circle #53 on the Reader Service Card.
