In the last post, I was able to get the μController version of the display module working with a basic test routine that proved that 1. the controller could be programmed and 2. the display was being driven correctly. The next stage is to flesh this out to replicate the MAX2771 API. The purpose here … Continue reading Further testing the μController Display Module
Alternate Display Driver
The purpose of this entry is to describe the assembly, programming and testing of the alternate Clock Display Module - whereby instead of a dedicated display driver chip, the module will be controlled by its own micro controller. This was created under a separate GitHub branch as UCtl_small. After the relative ease of getting the … Continue reading Alternate Display Driver
MAX7221 Driven Display Module
It is now time to put some theory into action. This entry will talk about the implementation of the clock display module driven by the MAX7221. This chip was selected for the first version of the display module as it provided a one-stop solution for driving seven segment displays. It also SPI compatible and provided some additional features like … Continue reading MAX7221 Driven Display Module
Ohm my!
I have to take a break from the circuits and layouts and go back and verify a couple of calculations. I am referring to the Rset for the MAX7221. I need to be sure that this is going to be correct in relation to the 7-Segment units chosen - and also the discrete LEDs for … Continue reading Ohm my!
Getting Connected
The layout is now done and made the rather gutsy decision to send it off to OSHPark for fabrication. In hindsight, I could have done this cheaper in that I actually opted for a 4 layer board with the ground and power on the inner layers just to get them out of the way. I did … Continue reading Getting Connected
Branching out
I mentioned in the last post that I will be trying out the display modules. I found it easier to break away from the original TfaC Git Hub project and create a new one dedicated to the research and development for the display module. The new one is simply ClockDisplayModule. The first consideration I needed … Continue reading Branching out
Back to the Drawing Board
Well, not exactly back to the drawing board for everything... What has developed since doing the actual schematic is that the display module was treated as a black box. Now it is time to open this up and understand how this is to work. The beauty of this approach is that not knowing anything about … Continue reading Back to the Drawing Board
Rebooting Electronics 