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<br><a href="../cad files/final/dc.44.zip">dc.44.zip</a> For DC driver
</p>
<h2>BOM</h2>
<p><b>Total 34191AMD 71.5$</b>
<p><b>Total 38431 AMD 80.3$ rate (1$=478AMD 30/06/2019)</b>
<br>2 DC Motor Jameco 253471 15296AMD (32$)
<br>1 sheet of 150x150x10mm polished plywood 5800AMD (12.1$)
<br>2 M6x90mm bolts(400AMD)+ 10 M6x35mm bolts(1000AMD) + 13 M6 nuts(500AMD) + 23 M5x20mm bolts(2300AMD) + 31 M5 nuts(465AMD)=4665AMD (9.7$)
<br>5 female 2x2 2.54mm (320AMD)+ 5 male 2x2 2.54mm (250AMD)+ 2 female 2x3 2.54mm (320AMD)+ 3 male 2x3 2.54mm (250AMD)=4240AMD (8.87$) ?
<br>4 thrust ball bearings 51105 3000AMD (6.2$)
<br>2 ATtiny44 microcontrollers 1400AMD (2.9$)
<br>2 LM3480IM3-5.0v regulator 800AMD (1.7$)
......@@ -165,8 +166,7 @@
<br>9 smd resistors(45AMD) + 6 smd capacitors(30AMD) + 4 LDR 5528 Q5(400AMD)=475AMD (1$)
<br>1m ribbon cable 478AMD (1$)
<br>2 696ZZ ball bearings 300AMD (0.6$)
<br>1 FR1 PCB board 717AMD 1.5$
<br>5 female 2x2 2.54mm + 5 male 2x2 2.54mm + 2 female 2x3 2.54mm + 3 male 2x3 2.54mm = ?
<br>1 FR1 PCB board 717AMD 1.5$
</p>
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......@@ -31,7 +31,7 @@
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<section>
<header class="main">
<h1>Applications and implications --- Հավելվածներ</h1>
<h1>Applications and implications --- Կիրառություններ և հետևություններ</h1>
</header>
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......@@ -64,7 +64,7 @@
kind of systems are used to increase solar energy harvesting. It is <a href="https://en.wikipedia.org/wiki/Solar_tracker">estimated</a>
that solar tracking can increase power output up to 30%.</p>
<h2>Who's done what beforehand?</h2>
<p>There are many types of solar trackers out there.
<p>There are many types of solar trackers out there. And there are several successful projects by FabAcademy students.
<br>FabAcademy 2013:<br>
FabLab Barcelona Mathew Owen <a href="http://fabacademy.org/archives/2013/students/owen.mathew/final-project.html">low cost solar tracker</a>
<br>FabAcademy 2016:<br>
......@@ -74,10 +74,53 @@
<br>FabLab Israel Ilia Feldshtein <a href="http://archive.fabacademy.org/archives/2017/fablabisrael/students/104/final_result.html">solar tracking cooker</a>
</p>
<h2>What will you design?</h2>
<p>My design will have worm gear transmissions for both axis in order to lock the system during winds and while motors are idle and to maximise the load it can handle.
<p>My design will have worm gear transmissions for both axis in order to lock the system during winds and while motors are idle also to maximise the load it can handle.
I will also put two pairs of thrust bearings one pair on each axle to minimise the wear and enable smooth movement.
</p>
<h2>What materials and components will be used?</h2>
<p>I will use:
<br>Plywood to make the frame and gears
<br>PLA to 3D print the worms
<br>2 DC (Jameco 253471) geared motors to move the system
<br>Fr1 to mill the PCB.</p>
<h2><br>Where will come from?</h2>
<p>Plywood will be bought from a hardware store called "Russki Les"
<br>PLA, FR1, DC motors are standard materials of fablab and will be provided by Dilijan fablab.
</p>
<h2>How much will they cost?</h2>
<p><p><b>Total 38431 AMD 80.3$ (rate 1$=478AMD 30/06/2019)</b>
<br>2 DC Motor Jameco 253471 15296AMD (32$)
<br>1 sheet of 150x150x10mm polished plywood 5800AMD (12.1$)
<br>2 M6x90mm bolts(400AMD)+ 10 M6x35mm bolts(1000AMD) + 13 M6 nuts(500AMD) + 23 M5x20mm bolts(2300AMD) + 31 M5 nuts(465AMD)=4665AMD (9.7$)
<br>5 female 2x2 2.54mm (320AMD)+ 5 male 2x2 2.54mm (250AMD)+ 2 female 2x3 2.54mm (320AMD)+ 3 male 2x3 2.54mm (250AMD)=4240AMD (8.87$) ?
<br>4 thrust ball bearings 51105 3000AMD (6.2$)
<br>2 ATtiny44 microcontrollers 1400AMD (2.9$)
<br>2 LM3480IM3-5.0v regulator 800AMD (1.7$)
<br>2 A4953 full bridge 760AMD (1.6$)
<br>2m copper cable 500amd (1.1$)
<br>9 smd resistors(45AMD) + 6 smd capacitors(30AMD) + 4 LDR 5528 Q5(400AMD)=475AMD (1$)
<br>1m ribbon cable 478AMD (1$)
<br>2 696ZZ ball bearings 300AMD (0.6$)
<br>1 FR1 PCB board 717AMD 1.5$ </p>
<h2>What parts and systems will be made? What processes will be used?</h2>
<p>The frame will be machined with shopbot (Substractive).
<br>worm gear 3D printed Makerbot (Additive).
<br>PCB design KiCad (electronics design and production).
<br>PCBs will be milled SRM20 (Substractive).
<br>ATtiny44 will be programmed using c code avrdude and gcc (embedded microcontroller interfacing and programming).
<br></p>
<h2>What questions need to be answered?</h2>
<p>How to measure resistance.
<br>How to calculate average values of 4 realtime measurments.
<br>How to perform this project in one week.
</p>
<h2>How will it be evaluated?</h2>
<p>According to FabAcademy <a href="http://fabacademy.org/2019/docs/FabAcademy-Assessment/project_requirements.html">Assessment</a> document
Our final project needs to demonstrate the skills we obtained during our study and prove our mastery.
<br>It will be evaluated how affordable it is to repeat the project (less than 100$ ideally ~ 10$).
<br>What percent of the parts is fabricated and what is bought.
<br>How well is documented the process.
</p>
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