LED Bar Graph OHA8494 Back

A LED Bar display for 10 Baht!

Preamble

One day, in March 2015, whilst shopping for Arduino bits and pieces in Ban Mo, an electronics street market in BKK, I came across a Cambodian couple selling various reclaimed electronic parts. In their collection was an LED Bar display from what was, I presume, a graphic equaliser. When I enquired as to the price, the gentleman stated that he required 20 baht for the aftermentioned item, but then his partner/girlfriend/wife corrected him and said that they only wanted 10 baht!

I purchased the LED Bar Graph display, took it home, and after much googling, I eventually realised that no specific libraries existed for this device. So I promptly set about writing my own sketch, which then evolved into an Arduino Library that was developed over the course of a couple of weeks. That library is the LEDBarGraphOHA8494.

The display

LED Bar Graph OHA8494 Front
LED Bar Graph OHA8494 Front
LED Bar Graph OHA8494 Back
LED Bar Graph OHA8494 Back

Implementation

OHA8494 and Nano on breadboard #1
OHA8494 and Nano on breadboard #1
OHA8494 and Nano on breadboard #2
OHA8494 and Nano on breadboard #2

The Arduino library

The LEDBarGraphOHA8494 Library available on github.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s