QUOTE(Gfaja @ Apr 17 2009, 07:25 PM)
That doesn't really make sense as a reason.
Also, why such a huge chip? Why not a 16F84A or something
You need 15 digital signals to replace the buttons and 6 analog for the potentiometers. The 16F84A is a good chip but will require some sort of external DAC or digital potentiometer for the analog signals (SPI interface requires 4 pins). At 19 digital pins I think the 16F84A would be short by a pin or two.
The 16F887 can apply three pins per analog control using a resistor network, voltage divider or op-amp adder to provide up, rest, and down voltages. Using this method would require 15 + 3 * 6 = 33 pins. You may have an extra couple of pins left over to flash LEDs and stuff.
Peace and LoveThis post has been edited by rjburke377: Apr 18 2009, 08:08 AM