Here's the challenge.
To get a 20 seg bar graph to display different segments according to an input voltage (like those retro volume level and equalizer indicators) using as smaller chip as possible. Also considering price and number of components.
There is the obvious solution of a whopping great chip but that has the downside of a whopping great chip.
There are lots of ways to do this with hardware and code. I was thinking of something like each segment having a resistor value and a zener diode, then using some kind of analogue level ouput from on pin to all the segments but I'm not sure how I'd do it.
See who can get it the smallest and cheapest.
Good luck...
To get a 20 seg bar graph to display different segments according to an input voltage (like those retro volume level and equalizer indicators) using as smaller chip as possible. Also considering price and number of components.
There is the obvious solution of a whopping great chip but that has the downside of a whopping great chip.
There are lots of ways to do this with hardware and code. I was thinking of something like each segment having a resistor value and a zener diode, then using some kind of analogue level ouput from on pin to all the segments but I'm not sure how I'd do it.
See who can get it the smallest and cheapest.
Good luck...