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indigo 2025-09-22 21:09:13 -05:00
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@ -80,7 +80,7 @@ I used a hot air station to assemble the cards. The final PCBs were purchased a
![](writeup/pcb_pads.png) ![](writeup/pcb_pads.png)
## How I feel about the end product ## How I feel about the end product
I think the card looks good. I like how the buttons feel, how the screen looks, and the overall design. I do wish the battery wasn't so chunky, but alas- NiMH AAAs are litteraly the cheapest rechargable batteries I could find (at sufficient power density). It would also be nice if I could have them assembled for me, so I could hand them out more freely. The border tracing algorithm worked pretty well, but wasn't quite fast enough when zoomed in, or where there's a lot of sharp edges. One of those locations is, unfortunately, where card starts on boot- a location I choose becuase it looks very good. If I were to redesign this, I'd go with a cheaper and higher spec MCU, preferebly one with an FPU. I chose an STM32 because I had a dev board, but they're really too expensive and low spec for a project such as this; I don't need automotive grade processors. I think the card looks good. I like how the buttons feel, how the screen looks, and the overall design. I do wish the battery wasn't so chunky, but alas- NiMH AAAs are litteraly the cheapest rechargable batteries I could find (at sufficient power density). It would also be nice if I could have them assembled for me, so I could hand them out more freely. The border tracing algorithm worked pretty well, but wasn't quite fast enough when zoomed in, or where there's a lot of sharp edges. One of those locations is, unfortunately, where card starts on boot- a location I choose becuase it looks very good. If I were to redesign this, I'd go with a cheaper and higher spec MCU, preferebly one with an FPU. I chose an STM32 because I had a dev board, but they're really too expensive and low spec for a project such as this; I don't need to pay for automotive grade hardware.
I also swapped the "charing" and "full" text. I'm not fixing it. I also swapped the "charing" and "full" text. I'm not fixing it.