Pages: [1]   Go Down
Author Topic: SPI 0.96" Color OLED Display Wiring  (Read 1715 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 11
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi

First of all, im new at this stuff, so bare with me.
I bought one of these:
http://www.ebay.co.uk/itm/SPI-0-96-65k-Color-OLED-Module-For-PIC-AVR-Arduino-/130769001327?pt=LH_DefaultDomain_0&hash=item1e72709b6f

It comes with a test code and a data sheet witch is downloadable here: www.wide.hk/download/65kOLEDdemo.rar

Im in doubt regarding the wiring. I though it would be pretty straight forward, but when I googled it, I found this description:

http://learn.adafruit.com/096-mini-color-oled/wiring



It seems my display is similar (maybe a knockoff -they are both called SSD1331) in the adafruit tutorial they are using a 3.3 V logic shifter? What is that, I why cant I just use the 3.3V pin on my Arduino Uno (or can I?)?

Thanks
Logged

Manchester (England England)
Online Online
Brattain Member
*****
Karma: 634
Posts: 34532
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
they are using a 3.3 V logic shifter? What is that,
It takes a signal and converts it between 5V and 3V3 in either direction. It is just a couple of FETs on a board.

Quote
I why cant I just use the 3.3V pin on my Arduino Uno?
The 3V3 pin has only a 50mA current capacity. Also if you power that chip with 3V3 the outputs connecting to it from the arduino will still be 5V and thus damage the chip.
Logged

Offline Offline
Newbie
*
Karma: 0
Posts: 11
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

FETs?

The ebay add said its Arduino compatable, but I still need a logic shifter then?

Thanks
« Last Edit: November 10, 2012, 01:24:07 pm by Asger81 » Logged

Leeds, UK
Offline Offline
Edison Member
*
Karma: 80
Posts: 1729
Once the magic blue smoke is released, it won't go back in!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

FETs = Transistors.

A lot of ebay auctions say "Arduino Compatible". In many cases that just means that an arduino and it can be hacked together in such a way that it works. In many cases that hacking is just a level shifter, or getting a 3.3v arduino.

You will need the (logic) level shifter otherwise you will most likely damage the display.
Logged

~Tom~

Offline Offline
Newbie
*
Karma: 0
Posts: 11
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

FETs = Transistors.

A lot of ebay auctions say "Arduino Compatible". In many cases that just means that an arduino and it can be hacked together in such a way that it works. In many cases that hacking is just a level shifter, or getting a 3.3v arduino.

You will need the (logic) level shifter otherwise you will most likely damage the display.

Thanks!  smiley
Logged

0
Offline Offline
Shannon Member
****
Karma: 215
Posts: 12455
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

FETs?

The ebay add said its Arduino compatable, but I still need a logic shifter then?

Thanks

Or a 3V3 Arduino.  There are some, there will be more in the future.
Logged

[ I won't respond to messages, use the forum please ]

Pages: [1]   Go Up
Jump to: