

Clock module 6502
This repository stores everything for my 6502 project. This includes schematics, datasheets, C scripts, and assembly programs
- Size
- 133.4 × 151.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 69
- Nets
- 117
- Pads
- 385
- Tracks, vias
- 978, 83
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 7 Aug 2020
- Updated
- 13 Feb 2021
Overview
Clock module 6502 is an open-source printed circuit board by Grudz, from the Grudz/6502_Computer repository on GitHub. It is a 4-layer board of 133.4 × 151.8 mm with 69 parts on 117 nets, routed with 978 tracks and 83 vias.
It is built around the LM555CN, MC74HC00AD and SN74LS04N, with the SN74LS08N, SN74LS32N and EG1218 among its other parts. Its parts include 13 ICs, 11 resistors, 9 capacitors, 8 switches and 5 diodes. It belongs with the retro computing and games and lEDs and displays boards of this library.
Main components
6LM555CN
PDIP-80℃~+70℃ 10mA 4.5V~16V PDIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / CountersMC74HC00AD
SOIC-14-55℃~+125℃ 1.5V~4.2V 1.9V、4.4V、5.9V 100mV、400mV 13ns@6V,50pF 1uA 2 2V~6V 4 5.2mA 5.2mA 500mV~1.8V 74HC Series NAND Gate SOIC-14 Logic Gates ROHSonsemiLogic GatesSN74LS04N
PDIP-140℃~+70℃ 1 15ns@5V,15pF 2.7V~3.4V 2V 4.75V~5.25V 400uA 500mV 6 74LS 800mV 8mA PDIP-14 Inverters ROHSTexas InstrumentsInvertersSN74LS08N
PDIP-140℃~+70℃ 2 2.7V~3.4V 20ns@5V,15pF 2V 4 4.75V~5.25V 400uA 500mV 74LS Series 800mV 8mA AND Gate PDIP-14 Logic Gates ROHSTexas InstrumentsLogic GatesSN74LS32N
PDIP-140℃~+70℃ 2 2.7V~3.4V 22ns@5V,15pF 2V 350mV~500mV 4 4.75V~5.25V 400uA 74LS Series 800mV 8mA OR Gate PDIP-14 Logic Gates ROHSTexas InstrumentsLogic GatesEG1218
插件-20℃~+70℃ 11.6mm 200mA 30V 4mm 7.4mm Black PC Pin Rectangular Columnar SPDT Through Hole Plugin Slide Switches ROHSE-SwitchSlide Switches
README
README.md6502_Computer
This repository stores everything for my 6502 project. This includes schematics, datasheets, C scripts, and assembly programs . Ben Eater designed a custom clock module and 6502 computer on a breadboard. I expanded on that project, by combining those and turning them into a PCB.
Pretty dope red PCB I designed (4 layers:wink:)

My Breadboard, not too shabby:sunglasses:

Parts
69| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1_U2, R1_U3, R1_U7, R1_UB1, R2_U1, R2_U3, R2_UB1, R3_U1, R3_UB1, R4_UB2 |
| 10 | TestPoint | TestPoint:TestPoint_Keystone_5000-5004_Miniature | A_Cap_U1, A_Cap_U1G1, A_Out_U1, A_Out_U1G1, M_Cap_U2, M_Cap_U2G1, M_Out_U2, M_Out_U2G1, Out_U5, Out_U5G1 |
| 6 | SW_Push_Dual | Button_Switch_THT:SW_Tactile_Straight_KSL0Axx1LFTR | SW1_U2, SW1_U7, SW1_UB1, SW2_UB1, SW3_UB1, SW4_UB1 |
| 5 | 220 | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R_Out1, R1_U1, R2_U2, R3_U3, R4_UB1 |
| 5 | LED | LED_THT:LED_D3.0mm_FlatTop | D1_U1, D1_U2, D1_U3, D1_U5, D1_UB1 |
| 4 | 0.1uF | Capacitor_THT:C_Disc_D7.5mm_W5.0mm_P5.00mm | C1_U2, C1_U7, C2_U1, C3_U2 |
| 3 | 0.01uF | Capacitor_THT:C_Disc_D7.5mm_W5.0mm_P5.00mm | C1, C1_U3, C2_U2 |
| 3 | LM555CN | Package_DIP:DIP-8_W7.62mm | U1, U2, U3 |
| 2 | 1uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1_U1, C2 |
| 2 | EG1218 | EG1218:EG1218 | SW1_U3, SWC_U14 |
| 1 | 10k | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1_U2 |
| 1 | 1M | Potentiometer_THT:Potentiometer_Bourns_3296W_Vertical | RV1_U1 |
| 1 | 1M | Resistor_SMD:R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R3_U2 |
| 1 | AT28C256 | Package_DIP:DIP-28_W15.24mm_Socket | U8_EEPROM1 |
| 1 | DGOF5S3 | Oscillator:Oscillator_DIP-14 | U13 |
| 1 | Debug_Monitor_Mount | Connector_PinHeader_2.54mm:PinHeader_2x17_P2.54mm_Vertical | J2 |
| 1 | HM62256LP-70 | Package_DIP:DIP-28_W15.24mm_Socket | U11_RAM1 |
| 1 | LED_Display | Display:WC1602A | U12 |
| 1 | MC74HC00A | SN74LS:SN74LS32N | U10 |
| 1 | Power_Jack | Connector_BarrelJack:BarrelJack_Horizontal | J3 |
| 1 | Power_Mount | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | SN74LS04N | SN74LS:SN74LS32N | U4 |
| 1 | SN74LS08N | SN74LS:SN74LS32N | U5 |
| 1 | SN74LS32N | SN74LS:SN74LS32N | U6 |
| 1 | Symbol_GNU-Logo_SilkscreenTop | Symbol:Symbol_GNU-Logo_SilkscreenTop | (this is only here b/c logo cool) |
| 1 | W65C02S | Package_DIP:DIP-40_W15.24mm_Socket | U7_CPU1 |
| 1 | W65C22S | Package_DIP:DIP-40_W15.24mm_Socket | U9_VIA1 |
The 67 most common of 69 parts.
Questions
How big is the Clock module 6502 PCB?
It measures 133.4 × 151.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Clock module 6502 use?
69 parts, built around the LM555CN, MC74HC00AD, SN74LS04N and SN74LS08N. 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 Clock module 6502 KiCad files?
From the Grudz/6502_Computer repository on GitHub, at the commit this page was made from: the board is clock_module_6502/clock_module_6502.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Clock module 6502 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Grudz before reusing the design.
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