Try to make a prototype mesa 7i92 board
26 Oct 2019 13:59 - 26 Oct 2019 14:01 #148827
by toplakd
Replied by toplakd on topic Try to make a prototype mesa 7i92 board
Why would you want to make an exact copy of something?
I think it's better to develop own board based on own knowledge and own expectations.
Yes, printing and assembling pcbs in china is very cheap today.
But the board price is not only pcb and assembly, development costs money and thats calculated into endprice.
I suggest you ask PCW, about MESA, he will help you getting further.
Otherwise, if Mesa is too high price, LinuxCNC works well with parallel port cards, and you can get the china BOB on ebay only for the price of pcb and assembly
I think it's better to develop own board based on own knowledge and own expectations.
Yes, printing and assembling pcbs in china is very cheap today.
But the board price is not only pcb and assembly, development costs money and thats calculated into endprice.
I suggest you ask PCW, about MESA, he will help you getting further.
Otherwise, if Mesa is too high price, LinuxCNC works well with parallel port cards, and you can get the china BOB on ebay only for the price of pcb and assembly
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26 Oct 2019 14:43 #148831
by tecno
Replied by tecno on topic Try to make a prototype mesa 7i92 board
Keep dreaming 
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26 Oct 2019 16:35 #148840
by tommylight
Lets do some math:
Mesa 7i92 = approx.100$
Making one:
Xilinx or whatever chips with the rest, i would guess 300 to 4000$, depending on how many of them you would destroy till you learn about handling electro static sensitive equipment,
Circuit boards = 500 to 1000$ due to errors and mistakes, postage back and forth to china etc,
Other equipment for soldering, several DVM's, oscilloscopes, logic analysers etc.
In total a minimum of 10.000$ till you make the first fully functioning one.
A while back i did make some (2) THC's of my own design and they did end up working very good and extremely fast (10.000 samples per second) that proved a total waste of time and resources as there is absolutely no need for all that speed, costed me over 3000$ for two of them and i am quite good at electronics, hell, even the first prototype worked properly from the first power on.
My advice, buy 2 parallel port cards at 15$ and do some work with it, then when you make some money go visit mesanet.com or mesaus.com or eusurplus.com and be very happy!
Replied by tommylight on topic Try to make a prototype mesa 7i92 board
Why can't we make prototype boards for low cost
Lets do some math:
Mesa 7i92 = approx.100$
Making one:
Xilinx or whatever chips with the rest, i would guess 300 to 4000$, depending on how many of them you would destroy till you learn about handling electro static sensitive equipment,
Circuit boards = 500 to 1000$ due to errors and mistakes, postage back and forth to china etc,
Other equipment for soldering, several DVM's, oscilloscopes, logic analysers etc.
In total a minimum of 10.000$ till you make the first fully functioning one.
A while back i did make some (2) THC's of my own design and they did end up working very good and extremely fast (10.000 samples per second) that proved a total waste of time and resources as there is absolutely no need for all that speed, costed me over 3000$ for two of them and i am quite good at electronics, hell, even the first prototype worked properly from the first power on.
My advice, buy 2 parallel port cards at 15$ and do some work with it, then when you make some money go visit mesanet.com or mesaus.com or eusurplus.com and be very happy!
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26 Oct 2019 16:36 #148841
by tommylight
Replied by tommylight on topic Try to make a prototype mesa 7i92 board
Not in my lifetime, i hope !Anyone have dead mesa boards?
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