Shared Projects

DRSSTC Data Acquisition Board for DRSSTCDriver-V5.1 designed as a modular stacked pair. This board is a successor to the DRSSTCDAQ-V2 board. The major new thing with this board is changing microprocessors from the ATmega328PB to the STM32G0B1CET6.

See the Fiber Optic to USB Serial Interface V1 board for a fiber optic to USB interface for this board.

ERRATA:

• Due to an upstream source footprint library issue, the pads for the footprint of U14, the WIZ850io Ethernet module, are undersized. They are 30mils and should have been either 39mil (or 1mm) or 42mil. They have to be an absolute minimum of about 36mil to force fit the module onto the board. The best workaround solution is to remove the pins from the WIZ850io board and replace them with smaller diameter pins. A less good workaround is to hand-drill the holes to the needed size, but since that destroys the thru-hole plating, then you’ll have to fix the three connections that are made on the top side of the board – namely, MOSI, nINT, and +3.3V. Those will require either jump wires or careful soldering to the pads on the top side of the board. This will be fixed on V3.1.

• The Fiber Optic Receiver transimpedance amp gain is way too high, even with the sensitivity potentiometer turned all the way down, unless you have an extremely long fiber run or a very horrible fiber cable. Use a 4.7K resistor for R74 instead of the 470K. The 1M pot still works fine and might could even be a 500K. But definitely change the R74 series resistor.

Needs to be manufactured in After Dark colour. Pins are available on AliExpress: https://aliexpress.com/item/33005352412.html

Picture: Andromeda Galaxy by NASA/JPL-Caltech: https://www.nasa.gov/mission_pages/galex/gallery-index.html Needs to be manufactured in After Dark colour. Pins are available on AliExpress: https://aliexpress.com/item/33005352412.html

Needs to be manufactured in After Dark colour. Pins are available on AliExpress: https://aliexpress.com/item/33005352412.html

Order this as a FLEX PCB only! Anything else will not be fabricated.

Order as normal 2 layer board.

This is an adapter that will allow you to replace the 73LS00 with a 74LS139 on a SHVC-2J3B-01 PCB. This may only be useful for a single purpose: To put the fan translated Final Fantasy 5 on an authentic Final Fantasy 5 SFC cart that uses the 2J3B board by using three 27C080’s.

Final Fantasy V is a 16 Mebibit game, but the fan translation bumps the size up to 20 Mebibit. FF5 can be found on a 1J3B board, which has a single 36-pin mask ROM, in which case patching it with the fan translation is straight forward. But FF5 also came on a 2J3B board, which has two 32-pin mask ROMs and a 74LS00, in which case it’s not so easy to patch the fan translation without some rework.

One method is to use three 8 Mebibit EPROMs (such as 27C080) but an additional 74LS139 decoder is needed for this. In this case, the 74LS00 is no longer needed. Since the 74LS00 socket already has most of the connections needed, it is a convenient place to mount the new 139 (using this adapter). You will need to remove the 74LS00 from the board. And you will need to add two jumper wires: A21 (pin-14 on the 74LS139 that comes on the 2J3B) and /OE3 which you will connect to the /OE pin of your third EPROM. Be sure to connect EPROM 1 and 2 to the correct socket on the board.

There are drill holes on this adapter PCB located close to the OE3 and A21 pads. They are there so that you can more neatly route the jumper wires for those pads.

C1 is for a 0.1µF capacitor in the 0603 package.

If you want to use the SNES ROM Utility SwapBin function to prepare your 20 Mebibit fan translated ROM, you must first expand it to 24 Mebibits. What I suggest doing is copying the last 4 Mebibits and pasting it onto the end of the ROM and that will expand the ROM to 24 Mebibits. Then, use the split ROM and SwapBin functions of the SNES ROM Utility. That will output 3 files that are 8 Mebibits each, ready to burn to 27C080 or 27C801 EPROMs. Of the three split files, install the first one in socket P0, the second one in socket P1, and then wire the /OE pin from the third one to the OE3 pad on this adapter board. The third EPROM will have to be installed upside down on the bottom side of the board.

SMuFF Connector Board

Smuff Relay Board

rp2040 mcp9600 max485 thermal input mudule

8 input esp32 adapter

Unregulated 170V Power Supply based on a DIP rectifier