Author Topic: Microcontroller, TFT and ? on breadboard question  (Read 2690 times)

0 Members and 1 Guest are viewing this topic.

Offline ez24Topic starter

  • Super Contributor
  • ***
  • Posts: 3082
  • Country: us
  • L.D.A.
Microcontroller, TFT and ? on breadboard question
« on: August 17, 2015, 12:07:58 am »
Hi

Here is a picture of a breadboard, unfortunately we cannot see the right side to see if a USB cable is connected to the Microstick II:  (click on the picture for a close up)

http://people.ece.cornell.edu/land/courses/ece4760/PIC32/index_TFT_display.html

The module on the right is a PIC32 on a Microstick II
http://www.microchip.com/Developmenttools/ProductDetails.aspx?PartNO=DM330013-2

The module in the center is a TFT from Adafruit
http://www.adafruit.com/product/1480

The module on the left is
https://www.sparkfun.com/products/retired/198
Notice it is retired (and the is for a 2015 class)

Well anyway from the picture I cannot understand how the Sparkfun board is hooked up.  I do not see the TXO or the RXI pins being used.  Is this board being only used as a source of 3.3 v for the TFT?

TIA
YouTube and Website Electronic Resources ------>  https://www.eevblog.com/forum/other-blog-specific/a/msg1341166/#msg1341166
 

Offline Chris C

  • Frequent Contributor
  • **
  • Posts: 259
  • Country: us
Re: Microcontroller, TFT and ? on breadboard question
« Reply #1 on: August 17, 2015, 12:37:41 am »
Is this board being only used as a source of 3.3 v for the TFT?

It appears that way.  I couldn't figure out why they'd do this, until I saw the breadboard damage right above the Microstick II.  And that's just what I can see, there's no telling what hell this breadboard has been through in an academic environment.  So I'm guessing the 3.3V from the Microstick comes out of the header to damaged breadboard contacts, and is therefore unusable.
 

Offline neslekkim

  • Super Contributor
  • ***
  • Posts: 1305
  • Country: no
Re: Microcontroller, TFT and ? on breadboard question
« Reply #2 on: August 17, 2015, 07:01:07 am »
The module on the left is
https://www.sparkfun.com/products/retired/198
Notice it is retired (and the is for a 2015 class)

Well anyway from the picture I cannot understand how the Sparkfun board is hooked up.  I do not see the TXO or the RXI pins being used.  Is this board being only used as a source of 3.3 v for the TFT?

Only for power, why not?
Look at the bottom pictures, there the microstick is providing power instead.
 

Offline ez24Topic starter

  • Super Contributor
  • ***
  • Posts: 3082
  • Country: us
  • L.D.A.
Re: Microcontroller, TFT and ? on breadboard question
« Reply #3 on: August 17, 2015, 08:02:33 pm »
Found this sentence
Quote
The connections will be much like the photos on the TFT page, but you will get Vdd from the connection in the middle of the Microstick2.

So the left module was only for power because the Microstick II has Vdd, but to use it, a header has to be soldered in.  He tells the students to solder in a 2 pin header to get to Vdd.  In the picture there is no header.  Seems a goof by Microchip.

YouTube and Website Electronic Resources ------>  https://www.eevblog.com/forum/other-blog-specific/a/msg1341166/#msg1341166
 

Offline neslekkim

  • Super Contributor
  • ***
  • Posts: 1305
  • Country: no
Re: Microcontroller, TFT and ? on breadboard question
« Reply #4 on: August 17, 2015, 08:05:15 pm »
Why is that a goof?, if you don't need it, it's no point in having an header that is easy to short out..

The holes are there, easy to solder on.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf