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Analysis of cost to produce random serail generator.
At Hackers 8.0, we had a discussion about the feasability of someone
building a random data generator. I volunteered to look into this
with the hopes of making a cheap and inexpensive device that has
2 DB-9 connectors (Serial through box) to be used to generate random
serial data at a particular baud rate.
Today, I called Newbridge Micro, they faxed me the data sheets, and
gave me the number for a local rep in San Jose. (408) 258-3600,
but I was appalled at the price. They wanted $52.50 each in
100 quantity. So it is clear that if I use this chip, which really
is a hybred, I cannot charge $50 each. So we have to decide
what to do, or how much more it will cost.
After examining the data sheet, the chip is probed by a pulse, and
a bit comes out with an equal probability of a "1" or a "0". Sorta
like a coin toss.
I think that the perifery cost of the other electronics, such as
shift registers, or UART which would be necessary to clock the bits
into an 8 bit register, etc, would cost about $6 - $8 in cost, then
I will have to fab the boards. I have friend at Douglas Electronics
who can give me a good price. It would cost $150 setup charge for the
PC boards and $2 per board.
1 ea RBG1210 $52.50
1 ea PC board $2.00
various chips $8.00
Setup $1.50 (1/100th setup charge)
Total parts $63.50 (100 quantity)
Cost (4 X parts) $254.00
So, it is clear that the cost is rather high, and not everyone can
afford this. But if you think that people will want to buy it at
that price, I can go ahead and do it, but the cost to me would
be about $250 to build just one of them, and I have someone who can
loan me the money to make a prototype. This also includes design
time and use of an electronics lab to test and get it running.
I wouldn't be able to borrow $6350 to build 100 of them, and I think
I can talk the rep into letting me purchase them in smaller quantity,
so I can build them on demand. I'm just not so sure that people will
want to pay $254 for one of these. So please lets discuss this,
among our group to determine if this price is reasonable.
Although, it IS possible to use a cesium noise source (Don't know
the cost of that) and perhaps I can cut that price down by about
a half or a third, but the design time would be much increased,
and perhaps there would be twice as much electronics, and perhaps
the posibility that the randomness won't be as good.