W65C816S-computer
piotrmski·W65C816S-computer
About the W65C816S-computer PCB
W65C816S-computer is an open source PCB design by piotrmski, published on GitHub. It is a 2-layer board measuring 188 × 79.8 mm, with 49 components from 24 distinct parts.
Other key parts include the L7805ABV, DS1813R-5, UA78M33C, CD74AC373E and CY7C1049G. By type, the board carries 26 capacitors, 13 ICs, 5 connectors, 3 resistors, 1 crystal and 1 switch.
From the project
The following repository documents my novice attempt at designing a microprocessor single-board computer. I had fun putting this design together, however without any prior experience it's left with many flaws which should be addressed if anyone would want to implement it again.
The following repository documents my novice attempt at designing a microprocessor single-board computer. I had fun putting this design together, however without any prior experience it's left with many flaws which should be addressed if anyone would want to implement it again.
It's a KiCad project, however a single-page PDF of the schematic and gerber files are included, so KiCad is not required to preview it.

Main components on the W65C816S-computer
W65C816S-computer bill of materials (BOM)
49 components, 24 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | L7805ABV | TO-220-3_Vertical | U1 |
| 1 | DS1813R-5 | SOT-23 | U2 |
| 1 | UA78M33C | TO-252-2 | U3 |
| 1 | CD74AC373E | DIP-20_W7.62mm_Socket_LongPads | U4 |
| 1 | CY7C1049G | TSOP-II-44_10.16x18.41mm_P0.8mm | U5 |
| 1 | W65C816SxP | DIP-40_W15.24mm_Socket_LongPads | U6 |
| 1 | W65C22SxP | DIP-40_W15.24mm_Socket_LongPads | U7 |
| 1 | SN74ABT245 | DIP-20_W7.62mm_Socket_LongPads | U8 |
| 1 | TXB0104D | SOIC-14_3.9x8.7mm_P1.27mm | U9 |
| 1 | 74ACT175 | DIP-16_W7.62mm_Socket_LongPads | U10 |
| 1 | 28C64 | DIP-28_W15.24mm_Socket_LongPads | U11 |
| 2 | ATF16V8C | DIP-20_W7.62mm_Socket_LongPads | U12, U13 |
| 1 | 20MHz | Oscillator_DIP-8 | X1 |
| 1 | Barrel_Jack_MountingPin | BarrelJack_GCT_DCJ200-10-A_Horizontal | J1 |
| 2 | Mini-DIN-6 | KMDGX6SBS | J2, J3 |
| 1 | Micro_SD_Card | microSD_HC_Wuerth_693072010801 | J4 |
| 1 | Conn_01x16 | PinHeader_1x16_P2.54mm_Vertical | J5 |
| 1 | SW_Push | SW_PUSH_6mm | SW1 |
| 2 | 0.33uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C9 |
| 12 | 0.1uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2, C3, C5, C6, C10, C11, C13, C15 +4 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 11 | 10uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4, C7, C8, C12, C14, C16, C18, C20 +3 |
| 1 | 0.01uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C22 |
| 2 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 1 | 470 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
W65C816S-computer design files
The KiCad project lives in the piotrmski/W65C816S-computer repository on GitHub; these links point at the commit this page was built from.
- Layout65816 computer.kicad_pcb
- Schematic65816 computer.kicad_sch
W65C816S-computer: common questions
How big is the W65C816S-computer PCB?
The W65C816S-computer measures 188 × 79.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the W65C816S-computer?
49 components, from 24 distinct parts. The full bill of materials is listed on this page.
Where can I download the W65C816S-computer design files?
From the piotrmski/W65C816S-computer repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the W65C816S-computer design in my own project?
The repository has no license, so all rights stay with piotrmski. Use it as a reference, and ask the author before reusing the design.