“I’ve created fire!”
The HDSP-2112 is a module with a LED matrix display which displays 8 characters with 5×7 LEDs each. Due to the high power requirement of more than 2 watts this display is not suitable for mobile devices. The operating voltage is 5 volts and it will be controlled using a 8 bit wide data bus and a 5 bit wide address bus.
I already experimented with this in 2013, however I stopped working on that and did not have a working setup ever.
This time I was more persistent – and it worked :-).
More about this along with a thorough documentation on the project page.
The Raspberry Pi can just be used as a small computer – but the really interesting thing is the opportunity to do experiments with self built electronic circuits. For this a breadboard is quite helpful.
Yesterday I got a Raspberry Pi – Model B with 512 MB RAM, Ethernet port and 2×USB to be precise.
Recently I got a number of LED matrix displays (HDSP-2112, eight characters, 5×7 pixels each). Used but in blameless condition – I just couldn’t resist ;-). The picture above shows the first functional test of one display with the character “A” which I “programmed” using hanging connections.
Update May 2021
Finally I managed to control this thing properly :-). Also see my latest post about this.