++

docs/3D Scanning and Printing.md

@@ -18,9 +18,8 @@ This week I made some 3d printed tools and 3d scanned using photogrammetry.
 ---
 I used [these files on thingiverse](https://www.thingiverse.com/thing:533472) to test design rules of the Ultimaker 3 I used in the lab.   
 These test geometries are designed to evaluate specific performance characteristics and motion systems in common low-cost FDM/FFF machines. Make Magazine's third annual 3D Printing Shootout was conducted using these files, created by Andreas Bastian to benchmark performance of desktop 3D printers.  
-How to evaluate the test geometries at: [link](http://wp.me/p22K2I-1TOt)  
 
-There are 7 individual files that help test:   
+These tests individually help with testing:
 1. Dimensional Accuracy  
 2. Bridging Performance  
 3. Overhang Performance  
@@ -29,7 +28,22 @@ There are 7 individual files that help test:
 6. XY Resonance  
 7. Z Resonance  
 
-I will finish this part when I am back in the lab.
+I use Cura to make the gcode. They are supposed to be evaluated at default at default 'normal' settings in PLA with a 0.4mm nozzle.  
+Layer Height: 0.15  
+Infill: 18%  
+Adhesion On
+Support Off
+
+![cura](./images/ed/ss/cura.jpg)  
+
+I used an Ultimaker 2+ to perform the tests (Fablab SP).
+![U2](docs/images/ed/ss/u2.jpg)   
+
+There is a nice evaluation system described in [How to evaluate the test geometries](https://makezine.com/2014/11/07/how-to-evaluate-the-2015-make-3dp-test-probes/). I used this to score the printer I was using. This is the result.
+![evaluation](./images/ed/ss/evaluation.jpg)  
+
+Here are all the tests overall:
+![tests](./images/ed/ss/tests.jpg)  
 
 2. Designing for 3D printing
 ---

docs/Electronics Design.md

@@ -121,12 +121,17 @@ But this time I used [Mods](http://mods.cba.mit.edu/) instead of Fabmodules. Her
 
 ![](./images/ed/ss/mods.gif)  
 
+#### At the lab
 
-I could not fabricate this board because did not have access to a lab.
+I started to mill the board, solder the components by following the workflow described in [Electronics Production week](./Electronics Production.md).  
 
-#### At the lab
+On the first attempt, the I found that the edges of outline were too close to the traces, and they were fragile.  
+![](./images/ed/ss/board1.jpg)  
+
+After offsetting the outline farther away, and milling the board again, the board with componants looks like this:
+![board](./images/ed/ss/board.jpg)  
 
-So steps remaining for this week - mill the board, solder the components, test.
+Programming the board is done during the [Embedded Programming](./Embedded Programming.md) week.  
 
 #### References
 

docs/Input Devices.md

@@ -15,28 +15,28 @@ When I have access to a lab, I will make a microcontroller board with a colour s
 ---
 
 0. Inputs using Arduino board (no lab access)  
----
-    I wanted to start with a simple project to get the basics right and understand fundamentals of using inputs with a microcontroller board. Using an Arduino Uno board with it's documentation was very basic. So I did this before designing my own board.  
-    For reference, I used the [Arduino Project 3](https://create.arduino.cc/projecthub/godboi123/love-o-meter-bda552) as it used the temperature sensor.
-    I started by collecting all the components.
+-
+I wanted to start with a simple project to get the basics right and understand fundamentals of using inputs with microcontroller board. Using an Arduino Uno board with it's documentation was very basic. So I did this befordesigning my own board.  
+For reference, I used the [Arduino Project 3](https://create.arduino.cc/projecthub/godboi123/love-o-meter-bda552) ait used the temperature sensor.
+I started by collecting all the components.
 
-    ![Gathering components](./images/input/shopping.jpeg)
+![Gathering components](./images/input/shopping.jpeg)
 
-    I used this schematic to connect everything.
-    ![Sketch](./images/input/schematic.jpeg)
+I used this schematic to connect everything.
+![Sketch](./images/input/schematic.jpeg)
 
-    The circuit setup was fairly easy. This is how it looks.
-    ![setup](./images/input/setup.jpeg)  
+The circuit setup was fairly easy. This is how it looks.
+![setup](./images/input/setup.jpeg)  
 
-    At first, all lights were continuously on. I checked the serial monitor and saw that the temperature was around 26 degrees without touching. So I adjusted the baseline temperature to 25 in the sketch. After some trial and error, I adjusted the sketch so that on touching it lightly for about 5 seconds, the second led lit up and on holding it tight for some seconds the third led lit up. The serial monitor indicated temperature range from 26-32 degrees.
-    So an increment of 2-4-6 degrees worked out perfectly.
-    ![serial](./images/input/serial.jpeg)  
+At first, all lights were continuously on. I checked the serial monitor and saw that the temperature was around 2degrees without touching. So I adjusted the baseline temperature to 25 in the sketch. After some trial and error, adjusted the sketch so that on touching it lightly for about 5 seconds, the second led lit up and on holding it tighfor some seconds the third led lit up. The serial monitor indicated temperature range from 26-32 degrees.
+So an increment of 2-4-6 degrees worked out perfectly.
+![serial](./images/input/serial.jpeg)  
 
-    This is it in action:  
-    ![in action](./images/input/hot.gif)  
+This is it in action:  
+![in action](./images/input/hot.gif)  
 
-    The code was fairly simple as well. You can find it here - [Sketch](./images/input/3leds.zip)  
-    Understanding the basics:
+The code was fairly simple as well. You can find it here - [Sketch](./images/input/3leds.zip)  
+Understanding the basics:
     ```
           // defining constants
           const int SensorPin = A1;                   // analog template input from temp sensor
@@ -95,12 +95,19 @@ When I have access to a lab, I will make a microcontroller board with a colour s
 1. Probing an input device's analog levels and digital signals
 ---
 
+
 2. Designing a micro-controller board to read input  
 ---
 For this I want to try measuring light color using a RGB colour sensor.
 
-[ATtiny412 Datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny212-214-412-414-416-DataSheet-DS40002287A.pdf)  
-[VEML6040](https://www.vishay.com/docs/84276/veml6040.pdf)
+First task is to select a microcontroller for the selected sensor.
+By looking at the datasheet and pinout of the sensor VEML6040, it needs only SDA and SCL to be connected by I2C communication protocol. The SDA needs a pull-up resistor.  
+
+The microcontroller itself needs to Tx, RX to be able to connect through UPDI to a programmer.
+
+I choose the Attiny412 because...
+[ATtiny412 Datasheet](https://ww1.microchip.com/downloads/en/DeviceDoc/ATtiny212-214-412-414-416-DataSheet-DS40002287A.pdf)
+[VEML6040](https://www.vishay.com/docs/84276/veml6040.pdf) - RGBW Color Sensor with I2C Interface  
 
 Downloaded the footprint from [Here](https://www.snapeda.com/parts/VEML6040A3OG/Vishay%20Semiconductor%20Opto%20Division/view-part/702426/?company=-&welcome=home)
 Installed the symbol and footprint on KiCAD using [this guide](https://www.snapeda.com/about/import/#)
@@ -139,5 +146,5 @@ Installed the symbol and footprint on KiCAD using [this guide](https://www.snape
 
 8. Important and Interesting Links
 ---
-https://en.wikipedia.org/wiki/List_of_sensors
-https://hackmd.io/RzTkiKoXTbqeQOn4Nz_zAw?view#INPUTS
+[List of sensors Wiki article](https://en.wikipedia.org/wiki/List_of_sensors)  
+[Victor's notes - INPUTS](https://hackmd.io/RzTkiKoXTbqeQOn4Nz_zAw?view#INPUTS)