3 ms·
> Ah, but 7-segment displays are far easier to drive from a microcontroller, so even if an LCD is cheaper, it might make for a more expensive system. It's not
by lelanthran 2y ago
> Ah, but 7-segment displays are far easier to drive from a microcontroller, so even if an LCD is cheaper, it might make for a more expensive system.
It's not all about economics either; I can read a 7-seg display from clear across a factory floor from almost any angle in the dark.
Try reading those low-cost LCDs in the same conditions (the dark is worse, because the LCD doesn't have a true black so the contrast is lower).
- jwells89 2y agoWhich is why standalone digital clocks generally still use them instead of LCDs, and why I'd like to build a 7-segment clock at some point. That condition-agnostic readability is hard to beat.
- dfox 2y agoThe reason why most standalone digital clocks use LED seven segment displays is that to this day almost all of them are built around the same weird PMOS Sanyo ASIC from late 1970's.
- xxs 2y agoOLED suggestion is even worse due to lack of longevity, burn-in.
- ComputerGuru 2y ago> I can read a 7-seg display from clear across a factory floor from almost any angle in the dark. Ironically, this is true at lower power/brightness than higher. A few gas stations near me got newer super-bright displays and you can no longer make them out at a distance.
- robocat 2y ago> I can read a 7-seg display from clear across a factory floor from almost any angle in the dark Is it dark when you are on your factory floor? And what is it that you need to read across the factory floor?
- lelanthran 2y ago> Is it dark when you are on your factory floor? Some equipment is placed directly under bright lights. > And what is it that you need to read across the factory floor? I don't understand the question. I mean, machines in a factory display something for the operator. If a machine doesn't need to display anything, why have a conversation about 7-seg LED vs LCD?