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Nescart

Keitark·fc-rom-vomitter·experimental/nes/hardware/nescart.kicad_pcb

Nescart PCB layout, top view — open source ESP32 board by Keitark
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About the Nescart PCB

Nescart is an open source ESP32 PCB design by Keitark, published on GitHub under the MIT license. It is a 6-layer board measuring 99.7 × 63.9 mm, with 84 components from 26 distinct parts.

Its main chip is the ESP32-S3-WROOM-1-N8, from the ESP32 family. Other key parts include the SN74LVC245APWR, CY62128EV30LL-45SXIT, SN74HC595PWR, SN74LVC157APWR and SN74LVC1G04DCKR. By type, the board carries 31 capacitors, 25 ICs, 18 resistors, 3 connectors, 2 switches and 2 LEDs.

It belongs with the iot & wireless and retro computing designs in this gallery.

From the project

Wi-Fi NROM development cartridge for Famicom: ESP32-S3, SRAM, KiCad, firmware, fabrication evidence, and an experimental NES variant.

This directory preserves the earlier front-loader NES-001 design as an experimental snapshot. It is included to make the architectural differences and design history reviewable; it is not part of the Rev A-FC manufacturing release.

The NES-001 contains a CIC lockout circuit. An ATtiny13A running a CIC-clone firmware keeps the console in reset while the ESP32-S3 owns the cartridge SRAM bus, then permits boot only after the ROM image has been copied and verified.

Nescart, from the project README
From the project README

Main components on the Nescart

SN74LVC245APWRCY62128EV30LL-45SXITSN74HC595PWRSN74LVC157APWRSN74LVC1G04DCKRSN74LVC1G10DCKRESP32-S3-WROOM-1-N8ATTINY13A-SSUAMS1117-3.3

Nescart bill of materials (BOM)

84 components, 26 distinct parts — part numbers from the project's BOM.

QtyPartRefs
12
SN74LVC245APWR
SN74LVC245APW
U1, U2, U3, U4, U5, U6, U7, U8 +4
2
CY62128EV30LL-45SXIT
U13, U14
2
SN74HC595PWR
74HC595PW
U15, U16
1
SN74LVC157APWR
SN74LVC157APW
U17
3
SN74LVC1G04DCKR
74LVC1G04
U18, U19, U20
2
SN74LVC1G10DCKR
74LVC1G10
U21, U22
1
ESP32-S3-WROOM-1-N8
U23
1
ATTINY13A-SSU
ATtiny13A-SSU
U24
1
AMS1117-3.3
U25
1
2N7002
Q1
1
cartridge_edge_72
J1
1
HRO TYPE-C-31-M-12
USB-C_16P
J2
1
PinHeader 1x4
DBG_UART
J3
1
B3U-1000P
RESET
SW1
1
B3U-1000P
BOOT
SW2
1
0603 LED
STATUS_BLUE
LED1
1
0603 LED
PWR_GREEN
LED2
2
SS34
D1, D2
1
1u X7R
1u
C1
24
100n X7R
100n
C2, C3, C4, C5, C6, C7, C8, C9 +16
Show 6 more
QtyPartRefs
5
10u X7R
10u
C26, C27, C28, C29, C30
1
22u X7R
22u
C31
11
0603 10k 1%
10k
R1, R2, R7, R10, R11, R12, R13, R14 +3
2
0603 5.1k 1%
5.1k
R3, R4
3
0603 100k 1%
100k
R5, R6, R8
2
0603 1k 1%
1k
R18, R19

Nescart design files

The KiCad project lives in the Keitark/fc-rom-vomitter repository on GitHub; these links point at the commit this page was built from.

Nescart: common questions

What microcontroller does the Nescart use?

The Nescart is built around the ESP32-S3-WROOM-1-N8, from the ESP32 family.

How big is the Nescart PCB?

The Nescart measures 99.7 × 63.9 mm, has 6 copper layers and is 1.2 mm thick.

How many components are on the Nescart?

84 components, from 26 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Nescart design files?

From the Keitark/fc-rom-vomitter repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Nescart design in my own project?

Yes, under the terms of its MIT license, which Keitark chose for the repository.

Can I test firmware for the Nescart without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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