Please see:
SMA20 New Low Cost 17 Channel DCC Decoders  at
http://model-railroad-hobbyist.com/node/24316
and 
http://www.scalemodelanimation.com/
for more detailed construction, operation and information.

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Release Notes for the 6.01 SMA Decoders
1. New decoders added featuring Stepper Motor support, Dual motor and audio play, and dual motor and triggered audio play

2. Long addressing for mobile and accessory decoders added with CV 29 specification

3. Several minor bug fixes and testing for the new NmraDcc library version supporting more platforms including the Teensy

4. Overall timing control for the dual motor control was improved. Timing for the audio decoders may be marginally compatible with servo timing for many functions simultaneously in use. 

5. Overall timing for slow servo transitions has been re-treaked to match the new library version performance.

6. 19  Preconfigured decoder sketches are included:

Mobile Decoders:	
  Dec_2Mot_3LED_TrigAud		Dual motor 3 LED Triggerd Audio
  Dec_2Mot_4LED_Aud_8Ftn		Dual motor 4 LED Audio 8 Function
  Dec_2Mot_12LED_1Srv_6Ftn		Dual motor drive, 12 LED 6 Funct
  Dec_7Serv_10LED_6Ftn			7 Servo 10 LED 6 Function
  Dec_10Serv_7LED_6Ftn			10 Servo 7 LED 6 Function
  Dec_13Serv_4LED_6Ftn			13 Servo 4 LED 6 Function
  Dec_15Serv_2LED_6Ftn			15 Servo 2 LED 6 Function
  Dec_17LED_1Ftn				17 LED ON/OFF Control
  Dec_17LED_6Ftn				17 LED 6 Function
  Dec_Dir_and_Fade			17 LED w/Direction Control & Fade
  Dec_SMA12_LED_Groups			LED Group Control for EuroSignals
  Dec_Stepper_6Ftn			Stepper control w/13 LED/ftn pins

Accessory Decoders:
  AccDec_7ServoBackandForth6Ftn	7 Servo 10 LED 6 Function
  AccDec_7Servos_10LED_6Ftn``	7 Servo 10 LED 6 Function
  AccDec_10Servos_7LED_6Ftn	`	10 Servo 7 LED 6 Function  
  AccDec_13Servos_4LED_6Ftn		13 Servo 4 LED 6 Function
  AccDec_15Servos_2LED_6Ftn		15 Servo 2 LED 6 Function
  AccDec_17LED_1Ftn			17 LED ON/OFF Control
  AccDec_17LED_6Ftn			17 LED 6 Function

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Release Notes for the 5.4 SMA Decoder Examples
1. Bug fix to allow maximum of 17 servos

2. Bug Fix to correct 2 reload #define definitions

3. Change to major Loop Delay cut in half to allow for fewer misses of DCC packet detection

4. File Decoders_MultiFunction_Description.rtf has minor edits for new file names and 6FTN version.

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Release Notes for the 5.1 SMA Decoder Examples

1. Automatic servo attachment and detachment has been implemented for all
   servo control functions. When a servo has stopped at the end of its traverse, 
   it will be "detached" by the software. This has been demonstrated 
   to reduce power consumption greatly and reduce servo "chatter."

2. Several bug fixes including all reported bugs as of May 2016

3. In the fully conficurable verions. all 17 pins now can be configured for any of 6 functions
   Config 0=On/Off,1=Blink,2=Servo,3=DBL LED Blink,4=variable Pulse ,5=fade on

4. Servo timing has a timing modifier added for extra slow servo traverse
   #define servo_slowdown  3   //servo loop counter limit
   Can be set from 0 to 255  -- the higher the number the slower the traverse

5. Software has been restructured to support new NmraDcc library releases 
   including the NmraDcc-MicroBahner library version.

6. 18 Predefined decoder skectekes are included:
Mobile Decoders:
	Dec_2MotDrive_12LED_1Srv_6Ftn		Dual motor drive, 12 LED 6 Function
	Dec_7Serv_10LED_6Ftn			7 Servo 10 LED 6 Function
	Dec_10Serv_7LED_6Ftn			10 Servo 7 LED 6 Function
	Dec_13Serv_4LED_6Ftn			13 Servo 4 LED 6 Function
	Dec_15Serv_2LED_6Ftn			15 Servo 2 LED 6 Function
	Dec_17LED_1Ftn				17 LED ON/OFF Control
	Dec_17LED_6Ftn				17 LED 6 Function
	Dec_Dir_and_Fade				17 LED with Dual Direction Control and FADE
	Dec_SMA12_LED_Groups			LED Group Control for Euro Signaling
Accessory Decoders:
	AccDec_7ServoBackandForth6Ftn		7 Servo 10 LED 6 Function
	AccDec_7Servos_10LED_6Ftn		7 Servo 10 LED 6 Function
	AccDec_10Servos_7LED_6Ftn		10 Servo 7 LED 6 Function
	AccDec_13Servos_4LED_6Ftn		13 Servo 4 LED 6 Function
	AccDec_15Servos_2LED_6Ftn		15 Servo 2 LED 6 Function
	AccDec_17LED_1Ftn				17 LED ON/OFF Control
	AccDec_17LED_6Ftn				17 LED 6 Function