Electronic design notes

Week 7 - Electronic design NOTES

Here you will find my notes description during this seventh class

Things to do

Questions to ask

Useful resources

interesting lead: fanstel bc832 micro ble for wearable

Assignments

Group assignment

Individual assignement

Redraw the echo hello-world board, add (at least) a button and LED (with current-limiting resistor), check the design rules, make it (if you have time this week, test it).
optional: simulate its operation. Measure its operation

Raw class notes

Speak

Ohad Meyuhas talk about 3D Printing

https://app.bots101.com/

Weekly reviews :

class :

We have to draw a circuit, and program it Test it with test equipement

How components work

DigiKey is the main provider of components

Components

capacitors: C = Q/V, I = C dV/dt small Capa can be used both sides bigger capacitor have + and - sides (polarized)
crystal it resonates, used to get time
Resonators include 2 capa aroud a crystal
inductor : opposite as a capacitor : V = L dl/dt
diode : current from anode to cathode A –[>|– C
Zener don’t understand (A –[>Z– C)
LED A –[>~(on top) – C
bipolar transistors, but we ll used mosfets !!
regulator limitations : For high power use DC to DC
op-amp or Analog amplifier, to amplify voltage tmoslty included in MC.
microcontroller (ATtiny 44)

Circuits

Best guide for electronics (missed th link)

Kirchoff’s laws : sum current at node, voltage around loop = 0

See Rapahael Schaad

Octopart is a search engine for parts

google pcb trace width calculator

Tools are fustrating

Tools:

cricuits, part of tinkercad
fritzing fun easy to use tools, but not recommanded

Eagle (strongly recommanded) popular tools in makers (free to use) the location of the parts are important for auto routing

Eagle in fusion, is not complete, but you can design in Eagle and import in fusion, Bas says that inverse is aso true.

fab.lbr is the library of fablab component

in cba gitlab there are serveral libs

gEDA, KiCad open sources, very powerfull the flow from design to production is made by separate tools not limited by licence access

there is a version of lib for Kicad

Altium, commercial partnership with solidworks.

NGspice for simulation ?? gnucaps Qucs, oregano

falstad need to have a look

mosis online service,

Exemples: pcb frameworkedpending pn

Assignement:

FTDI connector

Add button and led, make routes as close as possible

; test it

Individual assignement:

redraw the echo hello-world board,
add (at least) a button and LED (with current-limiting resistor)
check the design rules, make it, and test it
extra credit: simulate its operation
extra credit: render it

group assignement :

use the test equipement in your lab to observe the operation of a microcontroller