Differences

This shows you the differences between two versions of the page.

--- michka:research:microbial_fuel_cells:cardiff5 [2016-09-21 09:45] – michka
+++ michka:research:microbial_fuel_cells:cardiff5 [2016-09-21 09:56] (current) – michka
@@ Line 1: / Line 1: @@
 =====MFCitizen @Cardiff=====
-**September 7th-9th, 2016**
+**[[http://www.zprod.org|Paul Granjon]] & [[http://michkamelo.wordpress.com|Michka Mélo]], September 7th-9th, 2016**
-**[[http://www.zprod.org|Paul Granjon]] & [[http://michkamelo.wordpress.com|Michka Mélo]]**
 {{:michka:research:microbial_fuel_cells:20160909_184144.jpg?500|}}
@@ Line 167: / Line 166: @@
 ===2.3 Cutting a PCB for the LTC3108 DC/DC converter (Thomas et al. PHS)===
-{{:michka:research:microbial_fuel_cells:20160907_122902.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:20160907_122907.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:20160907_122918.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:dscf8160.jpg?300|}}
 The week before, Paul had ordered a small component called LTC3108, a small DC/DC converter featured in the power harnessing system from a paper by Thomas et. al, advised and selected by Johann for the Flower Power Pot project.
@@ Line 186: / Line 180: @@
      * sometimes, templates come up in large .zip files with components from a manufacturer, such as a Linear-Technology.zip. Then, you have to check if your component is in it.
    * open the template in Eagle, and check that it is the right one.
+{{:michka:research:microbial_fuel_cells:20160907_122902.jpg?500|}}
      * if you are using, as we did, a fiber-glass support with a copper layer on top, keep in mind that were you cut, you are removing the copper, and therefore the electrical connexion.
    * export the G-code to Eagle’s plug-in connecting it to the CNC
+{{:michka:research:microbial_fuel_cells:20160907_122918.jpg?500|}}
      * beware that the G-code is defined in the right unit - metric or imperial system.
    * make the CNC run
+{{:michka:research:microbial_fuel_cells:dscf8160.jpg?500|}}
      * this part of the process is quite technical, as the dimensions there are challenging Paul’s CNC sensitivity. Paul had to try out several times, and play with :
        * the number of passes of the CNC on each cut
@@ Line 198: / Line 195: @@
 ===2.4 Building Shantaram et al.’s PHS===
+{{:michka:research:microbial_fuel_cells:dscf8174.jpg?500|}}
 This was basically the same process as stated above, with a digression in updating Eagle to read the library files for the Maxim1797 layout, and getting compatibility issues with the CNC plug-in.
@@ Line 206: / Line 205: @@
 {{:michka:research:microbial_fuel_cells:20160909_162801.jpg?300|}}
 {{:michka:research:microbial_fuel_cells:20160909_162823.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:dscf8174.jpg?300|}}
 {{:michka:research:microbial_fuel_cells:dscf8175.jpg?300|}}
@@ Line 225: / Line 223: @@
 ===2.5 Beam robotics “Solar engine” PHS===
-{{:michka:research:microbial_fuel_cells:dscf8162.jpg?300|}}
+{{:michka:research:microbial_fuel_cells:dscf8163.jpg?500|}}
-{{:michka:research:microbial_fuel_cells:dscf8163.jpg?300|}}
 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.
@@ Line 239: / Line 236: @@
 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, and it worked great, lighting the LED for several minutes after cutting having charged the supercapacitor and shut down the power supply.
+{{:michka:research:microbial_fuel_cells:dscf8162.jpg?500|}}
 ===2.6 Through-hole-components-based charge pump===
@@ Line 254: / Line 253: @@
 ====2.7 Joule Thief PHS====
-{{:michka:research:microbial_fuel_cells:dscf8168.jpg?300|}}
+{{:michka:research:microbial_fuel_cells:dscf8171.jpg?500|}}
-{{:michka:research:microbial_fuel_cells:dscf8171.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:dscf8172.jpg?300|}}
 ===2.7.1 Literature review===
@@ Line 310: / Line 307: @@
 ==2.7.2 First prototype and next steps==
+{{:michka:research:microbial_fuel_cells:dscf8168.jpg?500|}}
 While searching all the information mentionned above, we wanted to do a quick test with a basic JT design.
@@ Line 347: / Line 346: @@
 ====3. Performance Tracking System====
-{{:michka:research:microbial_fuel_cells:dscf8161.jpg?300|}}
+{{:michka:research:microbial_fuel_cells:20160909_100612.jpg?500|}}
 ===3.1 Why INA219 current sensor ?===
@@ Line 411: / Line 410: @@
 ===4.1 Graphite electrode===
-{{:michka:research:microbial_fuel_cells:20160908_182623.jpg?300|}}
+{{:michka:research:microbial_fuel_cells:dscf8165.jpg?500|}}
-{{:michka:research:microbial_fuel_cells:20160908_182640.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:20160908_182710.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:dscf8164.jpg?300|}}
-{{:michka:research:microbial_fuel_cells:dscf8165.jpg?300|}}
 Paul built a graphite electrode of out graphite rods we bought at The Works, an Arts & Crafts shop.
+{{:michka:research:microbial_fuel_cells:20160908_182623.jpg?500|}}
 He cut down the rods in smaller chunks, drilled them, and used an old bicycle stainless steel cable to assemble them like a collar.
+{{:michka:research:microbial_fuel_cells:20160908_182640.jpg?300|}}
+{{:michka:research:microbial_fuel_cells:20160908_182710.jpg?300|}}
 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).
+{{:michka:research:microbial_fuel_cells:dscf8164.jpg?500|}}
 A quick multimeter test showed that the overal resistance of the assembly was about 3 ohms.