4 layers324.3 × 185.6 mm
4 layers160 × 100 mm
Rig
dmvo/dcjrigAGENTS.md holds our working rules. Copy and adapt them for your projects.
- Size
- 160 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 48
- Nets
- 99
- Pads
- 344
- Tracks, vias
- 529, 16
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 3 Oct 2026
- Updated
- 26 Oct 2026
Overview
Rig is an open-source printed circuit board by dmvo, from the dmvo/dcjrig repository on GitHub. It is a 4-layer board of 160 × 100 mm with 48 parts on 99 nets, routed with 529 tracks and 16 vias.
It is built around the 74AHCT541D, 74F821SPC and SN74AHCT14N. Its parts include 11 capacitors, 8 resistors, 6 ICs, 3 connectors and 2 diodes.
Main components
3
74AHCT541D
SO-20-300mil-40℃~+125℃ 4.5V~5.5V 5ns@5V,50pF 74AHCT 8 80uA 8mA 8mA Schmitt trigger Tri-State SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver
74F821SPC
PDIP-240℃~+70℃ 1 10 100mA 150MHz 20ns 24mA 3mA 4.5V~5.5V 5ns 74F Series 9.5ns@5V,50pF Asynchronous D-Type Reset Rising Edge PDIP-24 Flip Flops ROHSonsemiFlip Flops
SN74AHCT14N
PDIP-14-40℃~+85℃ 1.9V~2.1V 2uA 4.5V~5.5V 500mV~600mV 6 74AHCT 8.1ns@5V,50pF 8mA 8mA Noise suppression function Push-pull Schmitt trigger PDIP-14 Inverters ROHSTexas InstrumentsInverters
README
README.mdDCJ11 test rig
A KiCad project designed from scratch with AI assistance. The human gives instructions and reviews the AI's work. This covers the circuit, custom parts, models and docs. An autorouter lays the tracks.
AGENTS.md holds our working rules. Copy and adapt them for your projects.
The rig checks DEC DCJ11-AE CPUs through their built-in ODT console. It uses a 4 MHz crystal, a DC319A DLART and two ZIF sockets. The GAL source and programming file are included.
ODT works on hardware. CPU register writes read back correctly in the first console check. This is a quick check, not a full CPU test.
Open in KiCad 10 · Build guide · PCB files · Sources and credits
Inspired by Peter Schranz's Modular DCJ11 SBC.
Parts
48| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C3, C4, C5, C7, C9, C10, C11 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2, H3, H4 |
| 2 | 4.7k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R4 |
| 2 | 68p | Capacitor_THT:C_Disc_D7.5mm_W4.4mm_P5.00mm | C1, C2 |
| 1 | 0 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C6 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D2 |
| 1 | 1u | Capacitor_THT:C_Rect_L7.2mm_W5.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2 | C8 |
| 1 | 220R | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P7.62mm_Vertical | R7 |
| 1 | 4.7k | Resistor_THT:R_Array_SIP9 | RN1 |
| 1 | 4000 kHz | DCJRig:Crystal_HC49S_Vertical | Y1 |
| 1 | 47R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 5V DC | Connector_BarrelJack:BarrelJack_CUI_PJ-063AH_Horizontal | J3 |
| 1 | 614.4 kHz | Oscillator:Oscillator_DIP-14 | Y2 |
| 1 | 74AHCT541 | Package_DIP:DIP-20_W7.62mm_Socket_LongPads | U5 |
| 1 | 74F821SPC | Package_DIP:DIP-24_W7.62mm_Socket_LongPads | U4 |
| 1 | Baud rate set | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | CLK2 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP1 |
| 1 | DC319 | Package_DIP:DIP-40_W15.24mm_Socket_LongPads | U2 |
| 1 | DCJ11 | DCJRig:DCJ11_DIP60_2xTextool_264-4493_ZIF | U1 |
| 1 | DV | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP7 |
| 1 | GAL20V8A-15LP | Package_DIP:DIP-24_W7.62mm_Socket_LongPads | U6 |
| 1 | LE | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP6 |
| 1 | POWER | Button_Switch_THT:SW_Slide-03_Wuerth-WS-SLTV_10x2.5x6.4_P2.54mm | SW2 |
| 1 | POWER | LED_THT:LED_D5.0mm | D1 |
| 1 | RESET | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | SN74AHCT14N | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | U3 |
| 1 | TTL-USB | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J2 |
| 1 | ~{ALE} | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP5 |
| 1 | ~{BUFCTL} | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP4 |
| 1 | ~{INIT} | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP2 |
| 1 | ~{OE} | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP8 |
| 1 | ~{SCTL} | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP3 |
| 1 | ~{WEL} | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP9 |
Questions
How big is the Rig PCB?
It measures 160 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Rig use?
48 parts, built around the 74AHCT541D, 74F821SPC and SN74AHCT14N. 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 Rig KiCad files?
From the dmvo/dcjrig repository on GitHub, at the commit this page was made from: the board is kicad/rig/rig.kicad_pcb and its schematic kicad/rig/rig.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rig design in my own project?
Its repository states no licence, so its author keeps all rights: ask dmvo before reusing the design.
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