4 layers99.3 × 88.6 mm
4 layers139.2 × 112.3 mm
BE6502
89Mods/misc-computers3Misc microcomputer projects
- Size
- 139.2 × 112.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 60
- Nets
- 100
- Pads
- 361
- Tracks, vias
- 1,072, 157
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Sep 2023
- Updated
- 13 Sep 2026
Overview
BE6502 is an open-source printed circuit board by 89Mods, from the 89Mods/misc-computers repository on GitHub, published under the MIT licence. It is a 4-layer board of 139.2 × 112.3 mm with 60 parts on 100 nets, routed with 1,072 tracks and 157 vias.
It is built around the SK9822, 74AHC1G04SE and 74AHC1G14GV, with the 74HC00D among its other parts. Its parts include 15 ICs, 14 resistors, 13 capacitors, 8 connectors and 7 diodes.
Main components
4
SK9822
SMD-6P,5.5x5mm-20℃~+80℃ 2 20mA 30MHz 4.5V~5.5V Built-in PWM SMD-6P,5.5x5mm LED Drivers ROHSOPSCO OptoelectronicsLED Drivers
74AHC1G04SE
SOT-353-40℃~+125℃ 1 1 1.5V~3.85V 1.9V、2.9V、4.4V 1uA 2V~5.5V 500mV~1.65V 7.5ns@5V,50pF 74AHC 8mA 8mA Noise suppression function Schmitt trigger SOT-353 Inverters ROHSDiodes IncorporatedInverters
74AHC1G14GV
SOT-23-5-40℃~+125℃ 1 1 1.2V~2.2V、1.75V~3.15V、2.15V~3.85V 16.3ns@3.3V,15pF 2V~5.5V 40uA 74AHC 8mA 8mA 900mV~1.9V、1.35V~2.75V、1.65V~3.35V SOT-23-5 Logic Gates ROHSTECH PUBLICLogic Gates
74HC00D
SOP-14-40℃~+125℃ 1.5V、3.15V、4.2V 1.9V、3.7V、5.9V 100mV、400mV、400mV 2 2V~6V 4 40uA 5.2mA 5.2mA 500mV~1.8V 74HC Series 7ns@6V,50pF NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
README
README.mdmisc-computers
Misc microcomputer projects I’ve built. More info @ https://tholin.dev/misc_comps
Contains hardware schematics and PCB design files (if applicable) for each computer, as well as example software.
I hope this repo will help people with building their own computers. You can either re-build one of the systems from here, or reference my code and schematics when designing your own.
Parts
60| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 10K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R7, R8, R11, R12, R13, R14 |
| 9 | 1µF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C2, C4, C5, C6, C7, C9, C10, C11, C13 |
| 6 | SK9822 | TholinsStuff:SK9822-EC20 | U9, U10, U11, U12, U14, U15 |
| 5 | LED | LED_THT:LED_D3.0mm | D1, D2, D3, D6, D7 |
| 4 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J4, J5, J6, J7 |
| 2 | 100µF | Capacitor_THT:CP_Radial_D4.0mm_P2.00mm | C1, C3 |
| 2 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R6, R9 |
| 2 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D4, D5 |
| 2 | 74AHC1G04 | TholinsStuff:SOIC-6 | U8, U13 |
| 2 | Conn_01x06 | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J2, J3 |
| 1 | 100nF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C8 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R10 |
| 1 | 30pF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C12 |
| 1 | 65C22 | Package_DIP:DIP-40_W15.24mm | U6 |
| 1 | 74AHC1G14 | TholinsStuff:SOIC-6 | U2 |
| 1 | 74HC00 | Package_SO:SO-14_3.9x8.65mm_P1.27mm | U5 |
| 1 | CXO_DIP8 | Oscillator:Oscillator_DIP-8 | X1 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J8 |
| 1 | Crystal | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | IS61C256 | Package_DIP:DIP-28_W7.62mm | U3 |
| 1 | R65C51 | Package_DIP:DIP-28_W15.24mm | U7 |
| 1 | SST39SF010 | Package_DIP:DIP-32_W15.24mm | U4 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | WD65C02 | Package_DIP:DIP-40_W15.24mm | U1 |
Questions
How big is the BE6502 PCB?
It measures 139.2 × 112.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the BE6502 use?
60 parts, built around the SK9822, 74AHC1G04SE, 74AHC1G14GV and 74HC00D. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the BE6502 KiCad files?
From the 89Mods/misc-computers repository on GitHub, at the commit this page was made from: the board is BE6502/HW/BE6502.kicad_pcb and its schematic 8X305/HW/8X305.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BE6502 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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