6 layers90 × 66.8 mm
Nescart fc
Keitark/fc-rom-vomitter
Wi-Fi NROM development cartridge for Famicom: ESP32-S3, SRAM, KiCad, firmware, fabrication evidence, and an experimental NES variant.
83 partsMIT
6 layers99.7 × 63.9 mm
Nescart
Keitark/fc-rom-vomitterWi-Fi NROM development cartridge for Famicom: ESP32-S3, SRAM, KiCad, firmware, fabrication evidence, and an experimental NES variant.
- Size
- 99.7 × 63.9 mm
- Copper layers
- 6
- Thickness
- 1.2 mm
- Parts
- 84
- Nets
- 157
- Pads
- 664
- Tracks, vias
- 3,428, 469
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Jul 2026
- Updated
- 7 Oct 2026
Overview
Nescart is an open-source printed circuit board by Keitark, from the Keitark/fc-rom-vomitter repository on GitHub, published under the MIT licence. It is a 6-layer board of 99.7 × 63.9 mm with 84 parts on 157 nets, routed with 3,428 tracks and 469 vias.
It is built around the ATTINY13A-SSU, SN74LVC245APW and ESP32-S3-WROOM-1-N8, with the 74LVC1G04Z, 74HC595PW and 74LVC1G10DW among its other parts. Its parts include 31 capacitors, 25 ICs, 18 resistors, 4 diodes and 3 connectors. It belongs with the retro computing and games and radio and wireless boards and the ESP32 and AVR (ATmega, ATtiny) boards of this library.
Main components
10
ATTINY13A-SSU
SOIC-8-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 6 64Byte 64Byte 8 Bit AVR Built-in FLASH SOIC-8 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
SN74LVC245APW
TSSOP-20-40℃~+125℃ 1 1.65V~3.6V 24mA 24mA 3.8ns@3.3V,50pF 30uA 74LVC 8 Bidirectional Tri-State TSSOP-20 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
74LVC1G04Z
SOT-553-40℃~+125℃ 1 1 1.65V~5.5V 1.7V~2V 200uA 32mA 32mA 5ns@5V,50pF 700mV~800mV 74LVC SOT-553 Inverters ROHSDiodes IncorporatedInverters
74HC595PW
TSSOP-16-40℃~+125℃ 1 100MHz 19ns@4.5V,50pF 2V~6V 35mA 74HC 8 Serial-to-Serial or Parallel Tri-State TSSOP-16 Shift Registers ROHSNexperiaShift Registers
74LVC1G10DW
SOT-363-40℃~+125℃ 1 1.2V、1.9V、2.3V、2.4V、3.8V 1.65V~5.5V 1.7V~2V 3 3.6ns@5V,50pF 300mV、400mV、450mV、550mV 32mA 32mA 40uA 700mV~800mV 74LVC Series NAND Gate Overvoltage-tolerant input、Local shutdown mode Push-pull SOT-363 Logic Gates ROHSDiodes IncorporatedLogic Gates
CY62128EV30LL-45SXIT
SOIC-32-40℃~+85℃ 1Mbit 2.2V~3.6V 45ns 4uA Parallel Port (Parallel) SOIC-32 SRAM ROHSInfineon TechnologiesSRAM
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsSN74LVC157APW
TSSOP-16-4.4mm-40℃~+85℃ 24mA 24mA 2V~3.6V 3ns@3.3V,50pF 40uA 74LVC 8/4 Level shifting Multiplexer Single Supply TSSOP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
hardware/README.mdHardware source
nescart-fc.kicad_pro is the KiCad 10 entry point. The checked-in PCB and
schematic match the SHA-256 values recorded in
../manufacturing/rev-a-fc/release-manifest.json.
Sources of truth
- Electrical connectivity:
tools/gen_sch.pyand its generated hierarchical sheets. - FC60 edge geometry:
tools/fc_geometry.pyandtools/gen_edge_footprint.py. - Released routing/placement:
nescart-fc.kicad_pcb(revision-locked snapshot). - Fabrication constraints:
docs/DESIGN-CONSTRAINTS.md. - Part and placement mapping:
docs/sourcing-lock.csvanddocs/cpl-overrides.csv.
Do not hand-edit generated schematic connectivity. Regenerate it from the
tables in gen_sch.py, then compare the resulting pin/net map and run ERC.
Required release gates
- ERC has zero errors; expected warnings must be reviewed.
- Raw unconnected items are zero.
- Classified DRC has zero real errors and zero power disconnects.
layout_check.pyreports0 FAIL.- Both sides are rendered and visually inspected.
- Every fitted CPL reference is reconciled and visually checked after vendor import.
- Gerber, drill, BOM, CPL and evidence files come from the same PCB revision.
KiCad's bundled Python is required for scripts importing pcbnew.
Parts
84| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 100n | C_0603_1608Metric | C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24 +8 |
| 12 | SN74LVC245APW | TSSOP-20_4.4x6.5mm_P0.65mm | U1, U2, U3, U4, U5, U6, U7, U8, U9, U10, U11, U12 |
| 11 | 10k | R_0603_1608Metric | R1, R2, R7, R10, R11, R12, R13, R14, R15, R16, R17 |
| 5 | 10u | C_0805_2012Metric | C26, C27, C28, C29, C30 |
| 3 | 100k | R_0603_1608Metric | R5, R6, R8 |
| 3 | 74LVC1G04 | SOT-353_SC-70-5 | U18, U19, U20 |
| 2 | 1k | R_0603_1608Metric | R18, R19 |
| 2 | 5.1k | R_0603_1608Metric | R3, R4 |
| 2 | 74HC595PW | TSSOP-16_4.4x5mm_P0.65mm | U15, U16 |
| 2 | 74LVC1G10 | SOT-363_SC-70-6 | U21, U22 |
| 2 | CY62128EV30LL-45SXIT | SOP-32_11.305x20.495mm_P1.27mm | U13, U14 |
| 2 | SS34 | D_SMA | D1, D2 |
| 1 | 1u | C_0603_1608Metric | C1 |
| 1 | 22u | C_0805_2012Metric | C31 |
| 1 | 2N7002 | SOT-23 | Q1 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U25 |
| 1 | ATtiny13A-SSU | SOIC-8_3.9x4.9mm_P1.27mm | U24 |
| 1 | BOOT | SW_SPST_B3U-1000P | SW2 |
| 1 | DBG_UART | PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | ESP32-S3-WROOM-1-N8 | ESP32-S3-WROOM-1 | U23 |
| 1 | PWR_GREEN | LED_0603_1608Metric | LED2 |
| 1 | RESET | SW_SPST_B3U-1000P | SW1 |
| 1 | SN74LVC157APW | TSSOP-16_4.4x5mm_P0.65mm | U17 |
| 1 | STATUS_BLUE | LED_0603_1608Metric | LED1 |
| 1 | USB-C_16P | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2 |
| 1 | cartridge_edge_72 | cartridge_edge_72 | J1 |
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Questions
How big is the Nescart PCB?
It measures 99.7 × 63.9 mm and has 6 copper layers, 1.2 mm thick.
What parts does the Nescart use?
84 parts, built around the ATTINY13A-SSU, SN74LVC245APW, ESP32-S3-WROOM-1-N8 and 74LVC1G04Z. 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 Nescart KiCad files?
From the Keitark/fc-rom-vomitter repository on GitHub, at the commit this page was made from: the board is experimental/nes/hardware/nescart.kicad_pcb and its schematic experimental/nes/hardware/nescart.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Nescart 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).