Re: [DIYbio] Re: Making my own incubator inexpensively

On 04/25/2012 12:21 PM, Nathan McCorkle wrote:
> But in chemistry reactions are directly related to temperature

You can have a 0.1 deg C incubator. It will have a $4+ bill of materials instead of $2.8+
is all, and you will need to calibrate it occasionally with at least a 0.05 deg C accurate thermometer
that could be shared in a research group and sent of to be calibrated against standards.

With all that, it'll need a display for an added $1, or maybe a USB port for ??

The STM32 with the smallest memory, only 16KB has USB (but no ethernet) and costs $1.50 in 1's
so that would cost 1.75 with USB connector so the difference from our 50 cent microcontroller
is about +$1.25 for USB, or +$2.25 for USB and a display... Parts costs of $5.25 or $6.25.

for ethernet connected remote-control-easy
incubator and web site bragging about itself, there's a $6.1 STM32 that would make the BOM go to
$13.

Ethernet's nice, but costs. I think selling prices at 3X parts costs are usually
workable to make a profit, so a non-ethernet-incubator could cost $6 to ship and $12 to buy one.

Maybe you would treat them as disposable?

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