Railway Crossing Multi Track Two Way

    This article is based on the article with same name and Railway Crossing Part 4: Putting it all Together article.

   My tests included few models until at last version with sounds (warnings) and other count method for trains, but main structures are same:

- Railway_Crossing_1 (just added tip and free lights), sketch: us_barriers_rudysarduinoprojects_1b.ino

video: bariera automata pentru 2 linii (sine) cu monitorizare trenuri

video: Railway Crossing Multi Track Two Way (lights improvements)

- Railway_Crossing_2 (added sounds using Mike Osborn MKO tips),sketch: bell_and_button_servo_4

- Railway_Crossing_3 (added sounds and test different count methods: original with few updates or big changes)

with 3 sketches 

- us_barriers_2b

- us_barriers_2x

video: bariere automate cu avertizari sonore (americane) pentru 2 sine

video: Railway Crossing with Warnings for Multi Track Two Way

- us_barriers_2y

and last improved sketch:

with this schematic (LCD1602 with i2c interface is not added)

   For last sketch, I uploaded this videos:

- bariera automata cu lumini si sunete pentru cale ferata dubla

- Railway Crossing with lights and sounds for Multi Track Two Way

   If no train between IR sensors, barriers (gates) are open:

but at least a train is between sensors, barriers (gates) are closed:

29.08.2022

   I changed the sketch for remove sound after gate is open (us_barriers_2b_2)

as Jedidiah Sawyer wanted. 

    You can see video named Arduino Railway Crossing with sounds (video by Jedidiah Sawyer):

   Last change of the sketch is to have also fading light as in 2nd Avenue Railroad Crossing, Clanton, AL

so, last sketch is us_barriers_2b_3

and a short video made by Jedidiah Sawyer:

31.08.2022

   The variable for change the fade effects are:

and the fade for LED3 is

so, LED3 is off (brightness = 0), than after 200ms (variable time_to_stop) brightness increased at 1 (variable fadeAmount), than after 2 ms (variable fade_delay) brightness is 2, after more 2ms brightness is 4, etc, until brightness is 255 (maximum = 100%) .. is a pause (time_to_stop = 200ms) and after that brightness decrease with 1 at every 2ms until 0... 

Leds for blink effect (LED1 and LED2) are same period as fadding leds (LED3and LED4):

..so, you can change the values as you want,...

How to test NEM652 decoder with "DCC ready" board

 original article

   A few weeks ago, I  posted article named "DCC ready" board for classical locomotive (DC loco) where it presented how can be use the "DCC ready" board 

--->   

   I'm beginner in DCC so I try to show you how can test a NEM652 decoder on a DCC ready board. Later, I'll show you how you can install the decoder in your locomotive.

   

  For add the NEM652 decoder on DCC ready board you must remove small 8-pin board and connect the decoder:

- initial

- remove 8-pin board

- add NEM652 decoder, with correct position 

   I found some info about the NEM652 decoder:

- ROB’S RAILS: Article 9 - Blue Rapier DCC and Lights Upgrade

- LaisDcc Decoders Manual

   In order to test the decoder I used info and files from https://dcc-ex.com/index.html. 

   I used for tests:

- 0-30V/0-10A power supply (set to 12V voltage & 2A maximum current)

- Arduino Mega board (clone)

- Arduino Motor shield (clone)

- LCD1602 display + i2c interface (added later)

   First I cut trace for VIN as in article from https://dcc-ex.com/get-started/assembly.html

- initial (using a DMM on diode domain, test if resistance is near 0Ω)

- after (using a DMM on diode domain, test if resistance is big, OL - open load on display)

  I used easy way using installer for sketch in Arduino as in article from https://dcc-ex.com/get-started/installer.html

  For controller (Throttle) I used a web throttle as in article from https://dcc-ex.com/get-started/controllers.html

using as 3 = default number of adress of the NEM652 decoder.

    I used an Automatic white/red light for analog locomotive (DC) instead DC motor:

    I make a video named test a DCC decoder (NEM652) with Arduino Web Throttle where I presented how I used the Web Throttle and how react board with NEM652 decoder.

   Later, I added LCD1602display with i2c interface and I used again installer. Decimal address is 63 for 3F as hexa number for i2c interface adsress

On display of command station is shown logo

or state of decoder

Adapter board + NEM652 decoder + bicolor led as "locomotive" and Arduino Mega + Motor Shield + display as command station:

- forward

- backward

20.04.2022

    I want to find if my decoder has active Function 1 (pin 3) and Function 2 (free purple wire) so I added a green led at pin 3 in series with 3k3 resistor to pin 7 (common V+), also I added a yellow led at free purple wire in series with 3k3 resistor to pin 7 (common V+). Usual value for serie resistor is 1kΩ, but 3k3 was in my way.

   I make another video, named test a DCC decoder (NEM652) with Arduino Web Throttle - 2, where you see how I control "digital locomotive" through Web Throttle 

    Later, I added a wi-fi board with ESP8266-01 at Station:

and I uploaded sketch in Arduino Mega using the installer:

after I find channel for my wi-fi (bbk2 - channel 4):

On display we see the IP adress and port for station:

   I install Engine Driver application on my Android phone (see more info about aplication in article Choosing a Controller (Throttle)

   I tested also Function 1 (Bell) and Function 2 (Horn)

22.04.2022

   I tested the system with Android Throttle (Engine Driver application) and I make a video named test NEM decoder with DCC++EX Arduino Station and Android Throttle. For this situation, information on LCD display are very useful (IP and Port).