lecture notes

docs/Assignments/week_6_electronic_design/lecture_notes.md

@@ -63,4 +63,151 @@ Individual:
 Use a EDA tool to design a development board.
 
 Extra: Simulate it.
-Extra: Design a case for it.kicad
+Extra: Design a case for it kicad
+
+## Thursday Erwin
+
+Circuit - A circuit a closed loop where electrons can flow
+
+Difference in electrical ptential between points
+sum of all coltages around a loop = 0; There is never loss in voltage
+Water analogy
+
+Water definition
+High water fall high voltage
+The more water the more current
+
+Wall sockets - AC - The polarity switches constantly
+DC- Always positive or negative
+
+
+### Tools
+
+#### Multimeter
+Test voltage, current, resistance
+Some can test capacitors.
+
+Make sure to check where you wires are in.
+
+
+#### Oscilloscope
+Oscilloscope screen is a grid which each square having value.
+Each square can have ms in time and voltage.
+
+make sure to connect the line you wanna test and the ground
+
+3 Importand knobs on the oscilloscope 
+
+* Amount of volts to be displayed (change volt per square)
+* 2 buttons for each channel to change the height on the screen of the signal
+* Time to be displayed
+
+Oscilloscope is used when you have a problem. When something isn't working and you don't know what.
+
+
+voltage drop
+
+always first connect the ground
+
+You use Trigger to synchronize the oscilloscope to your signal
+
+#### Logic analyzer
+Can sense microcontroller communication and display it digitally on your laptop.
+
+salaea logic (software)
+
+Can only see digital signals. No analog ones
+
+Logic analysers can translate protocol to human readible stuffs
+
+### KiCad
+PCB creation
+connect components and design circuits 
+
+#### Schematic
+Create seperate schematics and connect them using labels.
+
+Use labels to keep it clean.
+
+![alt text](image-1.png)
+
+
+
+If you press `A` you can see all components
+
+![alt text](image-2.png)
+Now we search resistor and select it.
+
+![alt text](image-3.png)
+
+Now there is a resistor!
+Now we can also add a LED the same way.
+
+![alt text](image-4.png)
+
+| Key | What?                                                    |
+| :-- | -------------------------------------------------------- |
+| W   | Draw wire                                                |
+| A   | New part                                                 |
+| E   | Edit value (Only works on components that can be edited) |
+| X   | Draw a trace                                             |
+| D   | Drag   Move something with traces                        |
+|     |                                                          |
+
+
+![alt text](image-5.png)
+Connector mounting pins
+
+Make sure to add VCC and GND to your design even when you use pins to connect something 
+
+![alt text](image-6.png)
+Now we can go and make the circuit board.
+#### Pcb layout part
+In here you will define the physical placement of the pcb.
+
+You can do anything with pcb's and you can make them any shape you want.
+##### Assigning footprints
+![alt text](image-7.png)
+When importing I got this error
+This is because we didn't tell KiCad what type of components they are (SMD or through pins)
+
+Tools -> assign footprints
+
+![alt text](image-8.png)
+After you've assigned it all it should look like this.
+
+##### Custom shape
+
+![alt text](image-9.png)
+On the right you see a lot of layers.
+
+Silkscreen - Text
+Solder mask - Prevent solder to stick to that mask
+EdgeCuts - Shape of the pcb
+F.Cu - Front copper
+
+
+##### Design rules
+The closest track space can be the size of the tool (0.4mm)
+Always should give traces some more spaces between each other because otherwise its going to be super hard to check it with a multimeter.
+
+File -> Board setup -> design rules
+
+![alt text](image-10.png)
+In here yo can set design rules for the print.
+These settings are based on the machine it is produced on.
+
+For high power circuits you need to set bigger traces otherwise you have a higher resistance and the traces will get hot.
+
+
+![alt text](image-11.png)
+Don't forget to change the settings in `Net Classes`
+
+##### Exporting the board
+File -> Export ->
+
+
+Via - Circle through pcb
+
+
+everything comes from digikey