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8051 / Dev Board | |
Schematic |
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This design and its schematic have been placed in the public domain. They are distributed in the hope that they will be useful, but are provided without any warranty, not even a warranty of merchantability or fitness for a particular purpose.
Also, the original (ugly) schematic that Forrest used to
create the circuit board is available for download, as a
postscript file, or a
bitmap image.
| Quantity | Reference | Part |
|---|---|---|
| 2 | C1,C2 | 33pf |
| 5 | C3,C4,C5,C6,C7 | >1uf, 16V (for the MAX232) |
| 1 | C8 | 100uf (>6.3 Volt) |
| 1 | C9 | 100uf (>16 Volt) |
| 3 | C10,C11,C12 | 0.1uF (Decoupling Caps) |
| 1 | D1 | 13V Zener, Digi-Key # 1N4743ACT |
| 1 | D2 | 5.6V Zener, Digi-Key # 1N4734ACT |
| 2 | D3,D12 | 1N4001 Rectifier Diode |
| 8 | D4,D5,D6,D7,D8,D9,D10,D11 | LED, Digi-Key Part # P437 |
| 1 | R1 | 1MEG |
| 1 | R2 | 1K |
| 3 | R4,R5,R6 | 10K |
| 8 | R7,R8,R9,R10,R11,R12,R13,R14 | 470 Ohm |
| 1 | U1 | 87C51 (or equiv) |
| 1 | U2 | 74HC373 (Octal Latch) |
| 1 | U3 | 6264 (8K x 8 SRAM) |
| 1 | U4 | AM28F256 (Flash ROM) |
| 1 | U5 | 82C55 (I/O Chip) |
| 1 | U6 | 74HC138 (3:8 Decoder) |
| 2 | U7,U8 | 74C00 |
| 1 | U9 | MAX232 |
| 1 | Y1 | 11.0592 MHz Xtal |
| 2 | P1, P2 | DB-9 Female Connector, Digi-Key Part # A2100 |
| Site Map | PJRC Home | |
Technical Projects | |
8051 / Dev Board | |
Schematic |
