Shared Projects

Based on Geoff’s and Peter Hizalev’s ASCII VT100 Video Terminal with modifications for 3 volt RS232 driver, 5 volt TTL level shifting with enable / disable jumper, 100% updated component placement and routing, USB PTC fuse and noise filter, USB differential impedance matching, additional bypass capacitors, updated component values for proper levels, and HSYNC / VSYNC resistors to prevent ringing. Corrected pinout for PIC-ICSP, DC input changed from header to barrel jack, changed PS2 keyboard footprint. Hardware Version 1.4, and works with Firmware Version 3.0.4

https://www.barbouri.com/2022/03/24/updated-pic32-based-vt100-ascii-video-terminal/

RS422 to RJ45 test board

Added reverse voltage protection diode.

Panasonic AXT524124

Panasonic AXT624124

M Series 50mhz OCXO Board

This is my first try (plus updates) at routing the short version of an MBC5 flashcart, there certainly wasn’t a lot of room! Here’s the git repo where I’ve notionally been tracking updates: github.com/nm3210/GB_Flashcarts

Heavily inspired by HDR’s updated MBC3 cart with clean borders and neat original/OEM features like the production date squares and (totally unnecessary) fiducial markings, as well as his own older short MBC5 cart.

Board features

- GameBoy_GamePak_AGB-002 template from github.com/djedditt/kicad-gamepaks (though I had to change all the rear shapes into netted pads)

- Schematic mostly from github.com/HDR/MBC5-Flashcart

- Date markings and fiducials directly from github.com/HDR/MBC3-Flashcart (though I tweaked the size a bit)

- Some labels done via github.com/gregdavill/KiBuzzard

- No traces connecting to the cart connector pins on the back side of the board, with a ground plane buffer - this seems to be a ‘feature’ on a lot of the OEM MBC3/MBC5 nintendo gameboy cartidges I’ve seen, though I don’t know why. This restricted the routing on the board quite a bit!

- No via tents on the back side just to give it some extra color

Bill of Materials

Note: need to order on Oshpark at their half-thick/double cu “2oz-0.8mm” service for it to actually fit in a cart slot

Changelog

- v1 around 2022-03-12

 First release, hoping for the best

- v2 around 2022-03-22

 Change from TSOP-40 to TSOP-48 to allow for more chip variants (including ones I bought of course)

 Fixed wrong corner marker on U1 (from lower-left to upper-right, specifically: the side with the WriteEnable pin should be facing south)

 Minor routing updates/cleanup

[SEE UPDATED v2 HERE: https://oshpark.com/shared_projects/A7b5nxHa]

This is my first try at routing the short version of an MBC5 flashcart, there certainly wasn’t a lot of room! Here’s the git repo where I’ve notionally been tracking updates: github.com/nm3210/GB_Flashcarts

Heavily inspired by HDR’s updated MBC3 cart with clean borders and neat original/OEM features like the production date squares and (totally unnecessary) fiducial markings, as well as his own older short MBC5 cart.

Board features

- GameBoy_GamePak_AGB-002 template from github.com/djedditt/kicad-gamepaks (though I had to change all the rear shapes into netted pads)

- Schematic mostly from github.com/HDR/MBC5-Flashcart

- Date markings and fiducials directly from github.com/HDR/MBC3-Flashcart (though I tweaked the size a bit)

- Some labels done via github.com/gregdavill/KiBuzzard

- No traces connecting to the cart connector pins on the back side of the board, with a ground plane buffer - this seems to be a ‘feature’ on a lot of the OEM MBC3/MBC5 nintendo gameboy cartidges I’ve seen, though I don’t know why. This restricted the routing on the board quite a bit!

- No via tents on the back side just to give it some extra color

Bill of Materials

Note: need to order on Oshpark at their half-thick/double cu “2oz-0.8mm” service for it to actually fit in a cart slot

Changelog

- v1 around 2022-03-12: First release, hoping for the best

A little board to replace the CIC on the original NES or OpenTendo, and restore reset functionality. All credit goes to Redherring32. https://github.com/Redherring32/NullCIC

Same as this board but with 2.54 mm pitch pins on both sides of the board for use with header pins and breadboards.

Same as this board but with 5 mm pitch pins on both sides of the board, for use with screw terminals.

Karabas-pro Rev.Ї PCB

https://github.com/andykarpov/karabas-pro

WARNING: All holes are metallized inside, so one or more pins among the 4 center ones may have shorts on the side where they don’t have pads. A simple way to remove these is to use a drill bit to slightly chamfer the corner of the hole.

Donate: PayPal.Me

Arduino connector for NASOdyssey project v2

Button board for NASOdyssey project v1

DIY, Arduino-based telescope focuser. See https://github.com/danb35/myFocuserPro-PCB and https://sourceforge.net/projects/arduinofocuscontrollerpro/