4 layers406.4 × 50.8 mm
4 layers406.4 × 254 mm
Extarctrl
mrieker/pdp8i- Size
- 406.4 × 254 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 303
- Pads
- 866
- Tracks, vias
- 1,089, 151
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 12 Oct 2026
- Updated
- 1 Nov 2026
Overview
Extarctrl is an open-source printed circuit board by mrieker, from the mrieker/pdp8i repository on GitHub. It is a 4-layer board of 406.4 × 254 mm with 89 parts on 303 nets, routed with 1,089 tracks and 151 vias.
It is built around the 74AHC00D, 74AC10PC and 74HC175D, with the 74HC27D, 74HC85D and 74AHC04D among its other parts. Its parts include 41 capacitors, 5 connectors and 1 resistor.
Main components
12
74AHC00D
SOIC-14-40℃~+125℃ 1.5V~3.85V 2V~5.5V 2uA 4 500mV~1.65V 7.5ns@5V,50pF 74AHC Series 8mA 8mA NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
74AC10PC
DIP-14-40℃~+85℃ 1mV、1mV、2mV 2.1V~3.85V 2.99V、4.49V、5.49V 24mA 24mA 2V~6V 2uA 3 3 74AC Series 7ns@5V,50pF 900mV~1.65V NAND Gate DIP-14 Logic Gates ROHSonsemiLogic Gates
74HC175D
SOIC-16-40℃~+125℃ 0ns 1 13ns 24ns@6V,50pF 2V~6V 3pF 4 4uA 5.2mA 5.2mA 63MHz 74HC Series Asynchronous Complementary type D-Type Reset Rising Edge SOIC-16 Flip Flops ROHSToshibaFlip Flops74HC27D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V~2V、3.98V~4.32V、4.4V~4.5V、5.48V~5.81V、5.9V~6V 100mV、100mV、100mV、260mV、260mV 18ns@4.5V,50pF 2V~6V 2uA 3 3 5.2mA 5.2mA 500mV~1.8V 74HC Series NOR Gate SOIC-14 Logic Gates ROHSNexperiaGates
74HC85D
SOIC-16-40℃~+125℃ 2V~6V 33ns@6V,50pF 4 5.2mA 5.2mA 8uA A<B,A=B,A>B Active High SOIC-16 Digital Comparators ROHSNexperiaDigital Comparators74AHC04D
SOIC-14-40℃~+125℃ 1 1.5V~3.85V 1.9V、2.9V、4.4V 2V~5.5V 2uA 500mV~1.65V 6 7.5ns@5V,50pF 74AHC 8mA 8mA SOIC-14 Inverters ROHSNexperiaInverters74HC30S
SOP-140℃~+60℃ 1 1.5V~4.2V 1.9V~5.9V 100mV 25ns@5.0V,15pF 2V~6V 5.2mA 5.2mA 5.5uA 500mV~1.8V 74HC Series 8 NAND Gate Push-pull SOP-14 Logic Gates ROHSGRLogic Gates74AC11PC
DIP-14-40℃~+85℃ 100mV、440mV 2.1V~3.85V 2.46V、2.9V、3.76V、4.4V、4.76V、5.4V 24mA 24mA 2V~6V 2uA 3 3 74AC Series 8ns@5V,50pF 900mV~1.65V AND Gate DIP-14 Logic Gates ROHSonsemiLogic Gates74AC20M
SOIC-14SOIC-14 Inverters ROHSSTMicroelectronicsInverters74AHC02D
SOP-14-40℃~+125℃ 1.5V~3.85V 1.9V、2.9V、3.94V、4.4V 100mV、360mV、550mV 2 2V~5.5V 2uA 4 500mV~1.65V 7.5ns@5V,50pF 74AHC Series 8mA 8mA NOR Gate SO-14 Logic Gates ROHSNexperiaGates74AHC08D
SOIC-14-40℃~+125℃ 1.5V~3.85V 1.9V、2.9V、4.4V 2 2V~5.5V 2uA 4 500mV~1.65V 550mV 7.9ns@5V,50pF 74AHC Series 8mA 8mA AND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74AHC74D
SOP-14-40℃~+125℃ 1 115MHz 2 2V~5.5V 2uA 3pF 500ps 5ns 74AHC Series 8mA 8mA 9.3ns@5V,50pF Asynchronous Complementary D-Type Rising Edge Set and Reset SOP-14 Flip Flops ROHSNexperiaFlip Flops
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 41 | C | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | C11, C12, C13, C14, C21, C22, C23, C24, C25, C26, C31, C32, C33, C34, C35, C36 +25 |
| 11 | 74AHC00 | Package_DIP:DIP-14_W7.62mm | E14, E23, E25, E26, E36, E44, E46, E53, E54, E63, E83 |
| 7 | 74AHC540 | Package_DIP:DIP-20_W7.62mm | E11, E21, E31, E41, E51, E71, E81 |
| 4 | 74AC10 | Package_DIP:DIP-14_W7.62mm | E12, E45, E61, E74 |
| 4 | Conn_01x36 | Connector_PinHeader_2.54mm:PinHeader_1x36_P2.54mm_Vertical | J1, J2, J3, J4 |
| 3 | 74HC175 | Package_DIP:DIP-16_W7.62mm | E33, E52, E75 |
| 3 | 74HC27 | Package_DIP:DIP-14_W7.62mm | E24, E43, E55 |
| 3 | 74HC85 | Package_DIP:DIP-16_W7.62mm | E22, E32, E42 |
| 2 | 74AHC04 | Package_DIP:DIP-14_W7.62mm | E64, E72 |
| 2 | 74HC30 | Package_DIP:DIP-14_W7.62mm | E34, E65 |
| 1 | 47K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 74AC11 | Package_DIP:DIP-14_W7.62mm | E62 |
| 1 | 74AC20 | Package_DIP:DIP-14_W7.62mm | E84 |
| 1 | 74AHC02 | Package_DIP:DIP-14_W7.62mm | E35 |
| 1 | 74AHC08 | Package_DIP:DIP-14_W7.62mm | E82 |
| 1 | 74AHC74 | Package_DIP:DIP-14_W7.62mm | E73 |
| 1 | 74AHC86 | Package_DIP:DIP-14_W7.62mm | E13 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J5 |
| 1 | LOGO | myfoots:bwlogo15 | G*** |
Questions
How big is the Extarctrl PCB?
It measures 406.4 × 254 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Extarctrl use?
89 parts, built around the 74AHC00D, 74AC10PC, 74HC175D and 74HC27D. 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 Extarctrl KiCad files?
From the mrieker/pdp8i repository on GitHub, at the commit this page was made from: the board is kicads/extarctrl/extarctrl.kicad_pcb and its schematic kicads/backplane/backplane.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Extarctrl design in my own project?
Its repository states no licence, so its author keeps all rights: ask mrieker before reusing the design.
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