On 4/12/12 9:33 AM, Simon Quellen Field wrote:
Single-line LCD displays are $1 apiece.A WQVGA display, at 240x400 pixels (standard television) is $2.
The most important point is to decide the feature that is needed. Then decide the technology second. A frequent mistake here is to say "Wow! board with LCD only 0.01$! Let's use that!" Thus picking a poorly fitted technology first, and shoe-horning it into the user model. That's backwards. The prices you mention are component prices only and don't include associated cost (case edges, water proofing, real estate, mounting hardware, etc). My current product (high volume production next month, = stress) has 3 buttons with LEDs, no power button, voice annunciations using pre-recorded speech, and a volume knob. I haven't seen any products produced in volume which use AVR or atmega.
So gogofuge,
http://www.youtube.com/watch?v=Qcl04sqXqY4
googfuge is meant (I assume) as a low cost DIY product, not necessarily for a busy lab, more for individual use. It should cost no more than $35 in materials & parts (batteries not included). Single operator with a single programmable run. No speed control, maybe two settings, hi & lo. Runs to completion and stops. Only needs to provide a couple types of information, namely a couple numbers, a couple abbreviations (RPM, G, whatever) and a handful of operational modes (Idle, running, spinning up, spinning down). Displays have a variety of challenges and at a minimum needs a better case design to provide a proper viewing angle. Certainly most lab equipment does not need an image mapped xVGA display. If there's any display data to present, it should be sent to the nearest smart phone.
Speaking of eliminating cost & every button possible, why is there a SPIN vs VORTEX knob? Surely the unit can auto-detect which attachment is plugged into the top and set the motor to run accordingly.
This Thermo Sci centrifuge https://static.thermoscientific.com/images/F63741~wn.jpg
has a color touch xVGA display which seems, imho, complete overkill, a marketing tactic rather than usability enhancement.
pdf specs: https://www.google.com/search?q=Thermo+Scientific+Sorvall+Ultra+Centrifuge+Series+pdf
## Jonathan Cline ## jcline@ieee.org ## Mobile: +1-805-617-0223 ########################
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