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Author Topic: Mini-Mig Bill of Materials  (Read 23487 times)

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Offline freqmax

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Re: Mini-Mig Bill of Materials
« on: September 26, 2007, 06:34:03 PM »
@Crom00:
Some things you may want to consider:

* The original Async-SRAM chip is not available. And I don't see any reason to use two, when all the required ram will fit in one chip.

* Capacitor & Resistor package sizes are not detailed anywhere. My educated guess is that they are 0805 however.
(using recommended 0805 & 0605 solder pads and compare with pcb layout)

* Try to use RoHS components and solder to avoid legal problems with customs or enviromental authorities. In essense it's forbidden to sell any consumer non-RoHS complient device. Unless you can accomplish some exception, like telecoms equipment. Violations to this law may incour hefty fines.
Anyone using lead solder at home for repair or private purposes will have no problem.
 

Offline freqmax

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Re: Mini-Mig Bill of Materials
« Reply #1 on: September 26, 2007, 09:35:24 PM »
Just thinking about liability issues, as the flashmemory is the one containing the FPGA bitfile, ROM files and possible other higher level software. The only component containting anything really substantial is the MCU. And that is also programmed.
So if the board comes unprogrammed there's nothing to build a case around hardware wise. Forum posts could be used however as evidence on intent.
The board could be argued to be a plain FPGA developer board.

The only other thing that comes near being Amiga specific is the m68k and joystick ports.

Something else..
Are people still intent on using two SRAM chips?
Also noticed this SD flashmemory hack: http://hackszine.com/sd_20070921.jpg
 

Offline freqmax

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Re: Mini-Mig Bill of Materials
« Reply #2 on: October 04, 2007, 12:08:57 AM »
What online order shops gives the lowest price ..?
(while still keeping delivery times, good quality etc..)

Idea for EBay.. buy the components 10+, and then put together component kits.
 

Offline freqmax

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Re: Mini-Mig Bill of Materials
« Reply #3 on: October 06, 2007, 11:55:35 AM »
But there is also two LM1117 linear regulators that use it. It does however not hurt with excess capacity.
I have noticed that +5V is unfiltered:
http://www.opencircuits.com/Image:Minimig_v10_board_main_pwr.png