Minima - Jeff's ENCODER04

This is a proposed configuration to support Jeff's ENCODER04 routines within my Minima's Alternate Tuning Method. This is a fantastic addition for the Minima.

The following circuit should be added to the Minima to implement the ENCODER04 Rotary

Encoder and Multiple Push-Button Switches parallel to the original FN Switch. 

--------+
Arduino |
        |
   AVCC |
   pin20|--------+---1K---- +5V
        |        |
        |        = 100nF
        |        |
        |        G
        |
    PD5 |---------------- To Original Minima LowPass Filter
  pin11 |
        |
    PC0 |---------------- To Proposed Rf386 Power Amp Filter Selector
  pin23 |
        |
        |
    PD7 |                                    +--------+
  pin13 |------------------------+-----------|B      C|------------------------+
        |                        |     G-----|G  ENC  |                        |
    PD6 |--------------+---------)-----------|A      G|---+                    |
  pin12 |              |         |           +--------+   |                    |
        |              = 1nF*    = 1nF*                   G                    |
        |              |         |                                             |
        |              G         G                                             |
   AREF |                                                                      |
   pin21|----+-------+                       * = Optional but Suggested        |
        |    |       |                           for CPU's in RF Environments  |
        |    |       = 100nF                                                   |
        |    |       |                                                         |
        |    |       G                                                         |
        |   47K                                                                |
        |    |                                                                 |
        |    |                                                                 |
        |    |                                                                 |
    PC3 |    |                                                                 |
   pin26|----+-----+---4K7---+---4K7---+---4K7---+---4K7---+---4K7---+---4K7---+
        |    |     |         |         |         |         |         |         |
        |   FNS    = 1nF*    S         S         S         S         S         S
   AGND |    |     |         |         |         |         |         |         |
   pin22|----+-----+---------+---------+---------+---------+---------+---------+
        |    |
--------+    G

            "FN"           "Left"   "Right"   "SBand"     "Up"     "Down"     btn7
           (btn1)          (btn2)    (btn3)   (btn4)     (btn5)    (btn6)    (btn7)


Where:
  4K7 is a 4.7K ohm resistor
  47K is a 47K ohm resistor
  FNS is the original FN switch
    S is a new switch
    = is a capacitor
    G is a ground and AGND
  ENC is the Rotary Encoder (A/G/B) with Push Button (C/G).

NOte: The Encoder Push Button switch (pins C/G) is parallel with btn7, if desired,
      one or the other switches can be deleted of left in parallel.

Note: The Encoder pins A and B, can be exchanged to reverse the Encoders electrical rotation.

ENCODER04 is available as a User Option within the current Rev (ERB_IL) of Minima Alternate Tuning Method at:

https://github.com/wa0uwh/radiono_erb

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