Displays - Electronics Blog

Archive for the ‘Displays’ Category

ATtiny13 POV display: same hardware, different message


St. Patrick’s Day is coming up and I thought it’s already time to update the original Valentine’s Day POV display with a new message and make use of the second PCB I had done at BatchPCB. Also, fortunately, John “smeezekitty” (the author of the Attiny13 core used for programming it in Arduino IDE) stopped by my blog and pointed out to an issue with the original firmware, which prompted me to take another hard look at it and the result has been a saving of whopping 20 or so bytes – it was just enough to fit the word “BEER” which, as I mentioned in the original post, we did not have any space in flash left for. Well, now we do and below is the new software Read the rest of this entry »

Valentine’s Day POV display using ATtiny13 and Arduino IDE

Valentine's Day Chocolates with a message!

Valentine’s Day Chocolates with a message!

There’s nothing out there that says “I love you!” quite like a box of chocolates that actually says “I love you” (or “I ❤ U” as it were). Here is a quick electronics project that takes less than 2 hours to complete and makes a nice Valentine’s Day present. It is based on what has lately become my favorite small MCU – Atmel Attiny13 – and the software was written using my favorite development environment – Arduino IDE. So, keep reading for the schematic, the software, the build pictures and a small video showing the message slightly better than a still picture can Read the rest of this entry »

Serial OLED display and Arduino – a perfect combination

Demo application for Seetron GLO-416Y serial OLED display

Demo application for Seetron GLO-416Y serial OLED display

Every once in awhile your MCU, such as Arduino, needs to output some text and this is where you normally start bumping up against its limitations. Unless the MCU is exclusively serving a conventional LCD or other type of display capable of showing text, the display is pretty seriously taxing MCU’s available instructions cycles, memory as well as the number of output ports left after producing the useful work the device was designed for in the first place – move servos, scan inputs etc.

Enter the serial LCD Alternative – Seetron 4-line, 16-character Serial OLED Display which I recently had an opportunity to work with, thanks to Scott of Scott Edwards Electronics Inc., the manufacturer of this great device.
I will be using the display in a couple of projects I’m working on but I could not resist to check it out as soon as possible and that’s how the demo application you see below came about Read the rest of this entry »

Arduino Nano and HP5082-7433 vintage 7-segment LED display


I have to admit, I created this 7-segment display project not because I needed a visual output for my next Arduino project but simply because I have a really soft spot for those whimsical big-eyed miniature LED displays. Some 20+ years ago I have hand-soldered hundreds of these little displays at one of my first jobs and seeing these displays come to life was always a big relief – it meant that the device was working. But I digress…
In any case, despite the fact that these HP5082-7433 LED displays are rather hard to come by these days, they are still available from online sources such as eBay and they are a great match for any MCU-based project that requires visual output, especially indoors. They pack 3 digits that are big enough to be seen from anywhere on the desk and yet fit inside a breadboard-friendly DIL-12 package (15.37mm x 6.35mm). They are very easy to drive due to the very small forward currents and the rest of this post is about how to do just that Read the rest of this entry »

Tools

Coming soon ...

Recent Comments
  • mirceboy: Hello, this is perfect and im new with arduino, can you please tell me if its possible to change the code...
  • admin: That sounds great! Sorry I did not have a chance to follow your previous comment. But in general terms this is...
  • Mark: Hi Sir. Just dropped by to report that I have made the unipolar stepper motor rotated clockwise and...
  • Mark: All right sir I got it. Like any other post in some websites, I have found out that pins 5&6 (which are...
  • admin: If we are talking about unipolar (not bipolar, as in the title of this post), then yes, you may have the 5-pin...
  • Mark: Hi Sir it’s me again Mark. Just wanted to ask another one thing sir. Just wanted to ask if there are such...
  • admin: Thanks for stopping by, Peter. Sure you can deploy the Syntax Highlighting javascript in a plain HTML file....
  • Peter Newman: I realise that this post is quite old now and may not be monitored but just in case: I am wondering if...
  • Milo: Thank you so much, it really helps. I found this: http://optics.ph.unimelb.edu.a u/atomopt/diode/gh0781ra2c....
  • admin: I would say the IR estimation is way off. I don’t actually know it but it looks like it’s below...
Meta