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Fitting Heat Bed warning RGB LED

To warn using colours of RGB LED that the that the heatbed is hot.

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Fitting Heat Bed warning RGB LED

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

3D Printer RGB LED MAX31855 Heatbed warning light.

This is a better chip to use: see LOG files-

https://youtu.be/uQj48G6qNS4

To warn using colours of RGB LED that the that the heatbed is hot.

I take no reasonability for any inaccuracies or any damage caused.

Precision MAX6675 Module + K Type Thermocouple Temperature Sensor for Arduino but actually using 2M Wire K Type Thermocouple Temperature Measuring Probe Sensor

I using 2M Wire K Type Thermocouple Temperature Measuring Probe Sensor. This is a smaller sensor than the one that came with the MAX6675 Module to fit under the Heat Pad on the Heatbed

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

I use resistors for the RGB LED as follows :
150 Ohm for RED, 100 Ohm for Blue and
100 Ohm for Green. These are covered by heat shrink tubing here.

Not full tested over time to see if the RGB LED can stand up to the heat bed levels of temperature

USE_3D_Printer_RGB_MAX31855.ino

USE_3D_Printer_RGB_MAX31855.ino This is for the MAX31855, a better chip, using Arduino Nano

ino - 7.08 kB - 08/26/2016 at 08:55

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USE_3D_Printer_Heatbed_RGB.ino

// RGB LED Colours // Blue indicates an error with the Thermocouple Temperature Measuring Probe Sensor // Less than or equal to 35°C Green. Cool safe // More than 35°C Less than or equal to 45°C Yellow. Medium Heat. This is red + some green, not total green // More than 45°C Less than or equal to 50°C Red. Solid. Hot Danger do not touch // More than 50°C Less than or equal to 170°C Red. Flashing. Very Hot Danger do not touch // More than 170°C White Quick Flashing Red + Green + Blue LED : TOO HOT!!!! OVER Temperature ERROR!!!

ino - 7.50 kB - 08/12/2016 at 17:52

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