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#embedded

20 posts20 participants0 posts today

Minor accomplishment of the day: took the terrible example circuit & code from this Arduino starter kit, and made it actually do something useful with a 4-digit LED display.

The original code/circuit from the kit just displayed the same value on all 4 digits, which is kind of useless. The kit does contain all of the parts needed to drive all 4 displays, they just didn't use them. They also put the current-limiting resistor on the common cathodes, which meant digits with more segments on were dimmer.

That is just a shit-ton of fiddly bouncy wires, and I'm regretting getting rid of the old low-profile solid breadboard jumpers I had back when I last breadboarded a circuit in the early 2000's.

Also, the timing is off by a factor of two. That is a problem for tomorrow's Mark.

I will begin to do more smaller tutorials on #Embedded #Rust particularly with #Embassy as someone who's first language was #6502 #Assembler and working for decades with #C; despite its complexity, I think this exploration is worth doing as we have trillions of IoT devices and if we have a path forward to even in the least bit better secure them, might that be of some value?