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• Electronics experts answer this Arduino Nano odd issue

  Films4You • 09/27/2016 at 13:54 • 0 comments

  Electronics experts answer this Arduino Nano odd issue

• Spooky RGB LED Electronics expert wanted to figure it out!!!

  Films4You • 09/06/2016 at 13:00 • 0 comments

  LCD 12864 Cover fit PCB spooky RGB LED
  Electronics expert wanted to figure it out!!!
  via @YouTube

• Separate Power Supply stable supply needed

  Films4You • 09/03/2016 at 22:42 • 0 comments

  Separate Power Supply stable supply needed
  

  
  

  I was powering this via the same 12 Volts going into a RAMPS 1.4.
  

  
  

  The RAMPS 1.4 uses a PWM to adjust the temperatures of the Hot End and Heat Bed.
  

  
  

  This caused some signal feeding back over the Power Supply to this unit causing the RGB LED not displaying the correct colours sometimes.. (false signal added to the Power Supply from the RAMPS 1.4 PWM system).
  

  
  

  Using a Separate Power Supply stable supply appears to work better using an initial test. Displaying the colours for temperatures better.
  

• Using MAX31855 ​ chip is better

  Films4You • 08/26/2016 at 08:29 • 0 comments

  3D Printer RGB LED MAX31855 Heatbed warning light.

  
  Using MAX31855 chip is better
  

  The 2M Wire K Type Thermocouple Temperature Measuring
  Probe Sensor is conected to a MAX31855

  
  The MAX31855 then feeds data into an Arduino Nano which
  controls the output to the RGB LED

  Download Arduino Nano code:-
  USE_3D_Printer_RGB_MAX31855.imo
  https://1drv.ms/u/s!AjFFUc7muc09hDAkb8BbSts0-anN

  
  
  
  

• MAX31855K Thermocouple Sensor

  Films4You • 08/18/2016 at 00:16 • 0 comments

  I have a MAX31855K Thermocouple Sensor Module Temperature Detection Development Module on order I believe this will return better results.
  

  This will need a different Library foo the Arduino Nano code

  e.g Adafruit_MAX31855
  

• I need to try adding a 0.1uF capacitor across VCC and GND.

  Films4You • 07/30/2016 at 08:36 • 0 comments

  Seems to have changed to Yellow when the Bed temperature was switched off by the RAMPS 1.4 board.

  
  Cooling down from 30° C to ambient of about 28° C It should not change the RGB LED to Yellow as it does here.

  
  I need to try adding a 0.1uF capacitor across VCC and GND. As the RAMP 1.4 switches off the bedtemperature a pulse maybe passed that confuse the chip without this capacitor, causing this issue.
  

• DOES NOT WORK FULLY, cool down does not go back to green LED!!!

  Films4You • 07/26/2016 at 09:47 • 0 comments

  DOES NOT WORK FULLY, cool down does not go back to showing the green LED!!!
  

  K-Type probe, sensor issue?

• Precision MAX6675 Module + K Type; needs changing

  Films4You • 07/23/2016 at 20:09 • 0 comments

  Precision MAX6675 Module + K Type

  
  Thermocouple Temperature Sensor for Arduino but actually using 2M Wire K Type Thermocouple
  Temperature Measuring Probe Sensor

  
  Arduino Nano to read the sensor and control of to RGB LED.
  

  Please note that the method does appear not give a true temperature measurement. Particulary when the Heat Bedcools down.

  I plan to change the MAX6675 Module to a different one.

  
  MAX6675 Module works quite well but not well enough for me.
  

• Arduino Nano code. Now with Blue for error indication

  Films4You • 07/21/2016 at 15:43 • 0 comments

  Arduino Nano code a small code:-

  
  Code: Now with Blue for error indication
  https://1drv.ms/u/s!AjFFUc7muc09hCwoSqQUsh1Wabzj

• Quick Release Push Plate Hex & LED RGB issue; Cool down no Green

  Films4You • 07/21/2016 at 11:05 • 0 comments

  Quick Release Push Plate Hex & LED RGB issue

  via @YouTube

  Or watch the slow chainging back to "Green" Never really goes back to "Green"

  It could be the position of "Cold Junction" of the sensor is causing this issue i.e. not changing as quick as it should when cooling down. I need to try to discover if the position of "Cold Junction" of the sensor causing this issue or if it is something else.
  

  
  

  The LED RGB: I use this to indicate that the heat bed is too hot to touch.

  
  The LED RGB is controlled by a Arduino Nano and a Precision MAX6675 Module + K Type Thermocouple Temperature Sensor.

  
  It could be the position of "Cold Junction" of the sensor is causing this issue i.e. not changing as quick as it should when cooling down. I need to try to discover if the position of "Cold Junction" of the sensor causing this issue or if it is something else.

  
  The position of the "Cold Junction" being in a warm place. In my Power Supply, RAMPS box.

  
  Also I want to want to change the Arduino Nano code a small amount so that the RGB LED shows "Blue" if there is a problem, no connection, with the thermocouple, this is quite easy change in the code.

  
  Some information about "Cold Junction"

  
  The hot junction is the one that's actually measuring the temperature. The cold junction is an identical thermocouple that is not exposed to heat, but kept at a known temperature. This allows absolute temperature to be measured (by essentially subtracting out the cold junction temperature

  
  MAX6675 Cold-Junction-Compensated K-Thermocouple-to-Digital Converter (0°C to +1024°C)

  
  https://cdn-shop.adafruit.com/datasheets/MAX6675.pdf (PDF format), Adafruit

  
  Other information about"Cold Junction"

  
  https://www.maximintegrated.com/en/app-notes/index.mvp/id/4026

  
  http://www.ti.com/lit/an/sloa204/sloa204.pdf (PDF format)

  
  http://www.acromag.com/sites/default/files/How_to_prevent_temperature_measurement_errors_when_installing_thermocouple_sensors_and_transmitters_926A.pdf (PDF format)

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