STEMinar Presentation

STEMinar Presentation Slides 

Weekly Progress Report - 3/20

Progress
This past week we made some more progress. On Thursday we found out why the voltage drops as it goes across the 1 MΩ Resistor on the breadboard. The right side of the breadboard must be shorted to the ground.

Problem
As previously mentioned, the right side of the breadboard is somehow shorted to the ground. We must figure out how it is shorted to the ground. In addition we need to change it so that it will not be shorted to the ground.

Plan
Figure out how the circuit is shorted to the ground. Change the layout so that it will no longer be shorted to the ground. Test the circuit with the improved layout.  See if the circuit functions properly. If not, continue searching for problems in the circuit.

Standard Trace Width

http://www.expresspcb.com/tips-for-designing-pcbs


Found it!!

"A good trace width for low current digital and analog signals is 0.010″.

Traces that carry significant current should be wider than signal traces. The table below gives rough guidelines of how wide to make a trace for a given amount of current.

0.010″ 0.3 Amps
0.015″ 0.4 Amps
0.020″ 0.7 Amps
0.025″ 1.0 Amps
0.050″ 2.0 Amps
0.100″ 4.0 Amps
0.150″ 6.0 Amps" 

Small Update

In the photo above, it shows the new pixels design. It's 12 columns by 12 rows. The shape will be a "U" with a straight line on the top.

I have also created a spread sheet to find our ideal trace dimensions since we do not have most information to use the trace width calculator.