Combining vario and radio output into one speaker

On Saturday, February 28, 2015 at 9:51:53 AM UTC+13, Darryl Ramm wrote:
On Thursday, February 26, 2015 at 11:00:11 PM UTC-8, Bruce Hoult wrote:
On Friday, February 27, 2015 at 6:40:28 PM UTC+13, Paul B wrote:
On Friday, 27 February 2015 15:05:45 UTC+10, Bruce Hoult wrote:


Now you're getting fancy :-)

Thanks Bruce

The fancy is what I want to avoid, as the initial idea was to simplify things - i.e. one speaker instead of four .

Well, the good news is all those bits (except volume controls with knobs) would cost less than $10 in total and fit on a board a maximum of a couple of square inches in size.

Heh. These days you could use a $2 ATtiny85 microcontroller in an 8 pin DIP package. 20 MHz CPU. 3 10 bit analog to digital inputs. Scale and add them digitally. Output a pulse-width modulated 1 bit signal at 50 KHz or so, low pass filter (i.e. a resistor and a capacitor), then to the amplifier.

https://learn.sparkfun.com/tutorials...ny85-use-hints

OK, I'm being silly.

Oh come on, where is your ambition? Once you go digital there are lots of great options. You could add a digital parametric EQ, MIDI programming to customize the vario output, etc.

What is wrong with this industry and lack of innovation? Why has no vario developer offered MIDI output until now?

:-)

If you're going to do all that, you might need a more powerful CPU -- how about a full 32 bit ARM in an 8 pin DIP package for about the same price?

https://learn.adafruit.com/getting-s...pc810?view=all