Week 5 |  Electronics Design

 

NOTES

Final Results - Version 1 - FAIL

Helpful Sites

Fab Academy

Jie’s website


Electronic Software

Cad/Syn/mentor expensive

Spice for simulation (if you are really honing down for noise or power)

Verliog VHDL for programming IC


Electronic Components

Capacitor 

V_dot * C = I (derivate of Q)   ie current driven by change in voltage

act as a filter

stores energy and charge instantly (battery)


Inductor

Opposite of capacitor

V = L * I_dot (derivate of I) ie voltage driven by change in current

Choke high frequency data


Diodes

anode to cathode

    Schottky

    Zener - used to clip a voltage (which voltage it turns on)

    LED - a diode that glows

all just have different V/I curves


Mosfets

look like variable resistors (transistor that variables resistance)


Regulators

like zener but better at voltage control


Opamps

difference between voltage

negative feedback turns into integrator or differentiators

can also be used for gaining


Eagle

Open both schematic and board layout at the same time.


Grid Size: .025 in Pitch 2x

Track Width = 0.016 in


Show only Top layer for circuit

Show only Dimension layer for cutout


File -> Export -> Image

Select monochrome

Set to 1500 dpi

Board Design - Version 1 - FAIL

Problem


Solution

- Resized Grid to .025 and Pitch 2x

- Also added a zero ohm resistor to do a trace jump

Board Design - Version 2 - SUCCESS

Final Results - Version 2 - SUCCESS

Problem

-Bad solder connection on the button leads


Solution

  1. -Removing solder with wick

  2. -Smoothing over connections till nicely shiny