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| michka:research:microbial_fuel_cells:cardiff5 [2016-09-21 09:50] – michka | michka:research:microbial_fuel_cells:cardiff5 [2016-09-21 09:56] (current) – michka | ||
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| =====MFCitizen @Cardiff===== | =====MFCitizen @Cardiff===== | ||
| - | **September 7th-9th, 2016** | + | **[[http:// |
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| ===2.5 Beam robotics “Solar engine” PHS=== | ===2.5 Beam robotics “Solar engine” PHS=== | ||
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| When discussing about a lower-tech charge pump circuit, Paul mentionned the Beam robotics circuits, which are often made of basic through-hole off-the-shelf components, and are powered by renewables. | When discussing about a lower-tech charge pump circuit, Paul mentionned the Beam robotics circuits, which are often made of basic through-hole off-the-shelf components, and are powered by renewables. | ||
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| Anyway, we prototyped and tested the circuit (replacing the motor by a LED), and it worked perfectly well. A 2200 uF proved to be way to small to really see the circuit effect on a LED. We replaced it by a 10 F supercapacitor, | Anyway, we prototyped and tested the circuit (replacing the motor by a LED), and it worked perfectly well. A 2200 uF proved to be way to small to really see the circuit effect on a LED. We replaced it by a 10 F supercapacitor, | ||
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| ===2.6 Through-hole-components-based charge pump=== | ===2.6 Through-hole-components-based charge pump=== | ||
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| ====2.7 Joule Thief PHS==== | ====2.7 Joule Thief PHS==== | ||
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| ===2.7.1 Literature review=== | ===2.7.1 Literature review=== | ||
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| ==2.7.2 First prototype and next steps== | ==2.7.2 First prototype and next steps== | ||
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| While searching all the information mentionned above, we wanted to do a quick test with a basic JT design. | While searching all the information mentionned above, we wanted to do a quick test with a basic JT design. | ||
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| ====3. Performance Tracking System==== | ====3. Performance Tracking System==== | ||
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| ===3.1 Why INA219 current sensor ?=== | ===3.1 Why INA219 current sensor ?=== | ||
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| ===4.1 Graphite electrode=== | ===4.1 Graphite electrode=== | ||
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| Paul built a graphite electrode of out graphite rods we bought at The Works, an Arts & Crafts shop. | Paul built a graphite electrode of out graphite rods we bought at The Works, an Arts & Crafts shop. | ||
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| He cut down the rods in smaller chunks, drilled them, and used an old bicycle stainless steel cable to assemble them like a collar. | He cut down the rods in smaller chunks, drilled them, and used an old bicycle stainless steel cable to assemble them like a collar. | ||
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| Then, he tightened them up with a second bit of bicycle staineless steel cable (a choice of material advised by Johann, from the Flower Power pot project). | Then, he tightened them up with a second bit of bicycle staineless steel cable (a choice of material advised by Johann, from the Flower Power pot project). | ||
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| A quick multimeter test showed that the overal resistance of the assembly was about 3 ohms. | A quick multimeter test showed that the overal resistance of the assembly was about 3 ohms. | ||