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KiCad projectAll 73 files, ready to open in KiCad35 MB

For fabricationGerbers, drill, pick-and-place and BOMGerbers and drill zip821 KB Gerbers and drill zip: zxuno1010748 KB Gerbers and drill zip: zxuno1010806 KB Gerbers and drill zip: zxuno1010819 KB Gerbers and drill zip: zxuno1010768 KB Gerbers and drill zip: zxuno1010750 KB Gerbers and drill zip: zxuno1010_covers112 KB Gerbers and drill zip: zxuno1010_covers119 KB Gerbers and drill zip: zxuno1010_covers122 KB Gerbers and drill zip: zxuno1010_covers100 KB Gerbers and drill zip: zxuno1010_covers102 KB Gerbers and drill zip: zxuno1010_covers111 KB Pick and place (CSV)20 KB Pick and place (CSV): zxuno101016 KB Pick and place (CSV): zxuno101020 KB Pick and place (CSV): zxuno101020 KB Pick and place (CSV): zxuno101019 KB Pick and place (CSV): zxuno101016 KB Pick and place (CSV): zxuno1010_covers35 B Pick and place (CSV): zxuno1010_covers35 B Pick and place (CSV): zxuno1010_covers35 B Pick and place (CSV): zxuno1010_covers103 B Pick and place (CSV): zxuno1010_covers35 B Pick and place (CSV): zxuno1010_covers35 B BOM CSV107 KB

Schematic PDFEvery sheet, to read or print656 KB

3D modelThe board with its parts, for an enclosure (GLB)3D model (GLB)1.9 MB 3D model (GLB): zxuno10101.9 MB 3D model (GLB): zxuno10101.8 MB 3D model (GLB): zxuno10101.8 MB 3D model (GLB): zxuno101029 MB 3D model (GLB): zxuno1010_covers461 KB

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README

ZX-UNO.1010

10x10cm PCB variant of ZX-Uno project

Tech specs:

Fully compatible with ZX Uno v4.1 and ZX-Uno VGA 2M
XC6SLX9 FPGA
2Mb SRAM memory
VGA video output
PAL/NTSC video + audio output via 3.5 jack connector (raspberry-pi compatible pinout)
PS/2 keyboard and mouse ports
2xDB-9 ports for Atari-compatible joysticks
SD/microSD card slot
Tape input via Bluetooth module or ordinary 3.5 jack
MIDI
WiFi module
RTC (starting from rev.B)
Type C (starting from rev.D) or MicroUSB power supply
Board optimized for G738 and G706 cases

FAQ on official site: link

Some random photos: link

Changelog

Rev.A - first release (main pcb errata and covers errata).
Rev.A1 - fixes all known issues of rev.A.
Rev.B:
- added RTC
- changed second joystick port wiring - in rev.A it's has been wired like in ZXUNO-VGA2M, but now it's wired like Joysplitter, which is officially supported way
- joysticks are now powered by +5V rail instead of +3.3V - this should improve compatibility with various RF gamepads

Comments

About

10x10cm PCB variant of ZX-UNO project for G738/G706 enclosure

fpga pcb zx-spectrum zx-uno zxspectrum zxuno

LICENSE
24 stars
0 comments
12 downloads

Updated Sep 30, 2026

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optimized SAM2695 footprint for hand soldering

added opamp for proper MIDI sound mixing

added buffer in DAC circuit

added separate LDO for SD card and WiFi module

added resistor between WiFi's GPIO15 and GND to prevent IC heating

remove beeper (which wasn't used anyway)

improved power distribution for FPGA chip

pcb corners are rounded now

experimental tape-in circuit

Rev.C:

added dedicated LDO for audio to improve noise floor
added optional capacitor for NTSC quartz stability
added missing decoupling capacitor on RTC power rail
added current-limiting resistors after opamp on sound output
changed R76, R80 from 10kΩ to 8.2kΩ
changed U10 opamp from NE5532 to LMV358 as it better suited for low-voltage operation
3mm front leds replaced by 5mm
experimental reset circuit based on MAX809
reverted to old tape-in circuit

Rev.D:

used USB Type C instead of Micro USB
PJ-320 3.5mm jack replaced by PJ-322
added solder jumper to select 3.5mm jack CVBS pinout
MIDI synthesizer U6 uses clean analog power rail now
improved W25Q128 footprint to able to install IC in WSON package
some minor PCB layout changes to reduce WiFi interference
reverted to old reset circuit

Rev.D1:

changed R16 from 220Ω to 1kΩ to reduce power led bightness
changed R70, R71 from 10kΩ to 12kΩ to improve balance with AY
changed C51 from 100nF to 1uF to improve audio noise floor
changed C13 value as some quartz failed to start with 4.3pF load
changed U17 from LP2985-3.3 to TPS7A2033PDBVR due to better PSRR
changed U15 from 74LVC2G34 to 74LVC2G04 as it's more common in my projects

References

ZX Uno official site: link
ZX Uno VGA 2M: link
Great collection of cores, games and much stuff for ZX Uno: link, in english

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