54 lines
2.4 KiB
Markdown
54 lines
2.4 KiB
Markdown
# Dual magnetic stir controller
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## Overview
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This is the Arduino sketch to build a double magnetic stirrer based on 2 fans, a 1602 LCD display, a KY-040 encoder and an Arduino (e.g. Uno, Leonardo, Pro Micro).
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<p align="center">
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<img src="https://github.com/micworg/stir/blob/master/images/stir.jpg" width=500>
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</p>
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In order to put the stirrer into operation you have to change the settings in stir.ino according to your setup.
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## Overview of Functions
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All functions are controlled by the KY-040 encoder:
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* **Press briefly:** change between menu, stirrer 1 and stirrer 2
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* **Turn when menu is selected**: change between menu items (SPEED, BOOST, BTIME, CATCH, CTIME)
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* **Long press when menu is selected**: Lock all functions (unlock also by long press)
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* **When a stirrer is selected**:
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* **SPEED**: turn sets speed, long press switches stirrer on or off.
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* **BOOST**: turn sets boost speed, long press activates/deactivates the boost function (running time is shown in the display).
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* **BTIME**: turn sets the boost time in minutes.
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* **CATCH**: turn activates/deactivates the fishing function
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* **CTIME**: turn sets the interval in minutes for the fish catching function
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## Display Indicators:
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* **Bottom Left**: Menu
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* **Bottom centre/right**: Displays the set values for the stirrers depending on the selected menu item.
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* **Top Center/Right**: Displays the current stirrer speed (or 'OFF' or 'CAT' (Fishing)).
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* **Top left**: shows the remaining time of the boost function.
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## Settings (in stir.ino)
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|Value|Description|
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|:----|:----------|
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|SPEEDINC|increment of speed values when turning the encoder|
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|FANMIN|fan minimum speed (should be a value at which the fan runs safely)|
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|FANMAX|maximum speed of the fan (it is important that this is the real maximum value of the fan)|
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|RINTERVAL|regulation interval (ms)|
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|RDELAY|extra regulation delay when value changes (ms)|
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|CATCHSTOP|stop interval for stir fish catch function (ms)|
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|PWM0, PWN1|PWM output pins|
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|I0, I1|interrupts for rpm measurement (2 and 3 for Leonardo and ProMicro / 0 and 1 for Uno)|
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|CLK, DT, SW|pins for KY-040 encoder|
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## Schematics
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<p align="center">
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<img src="https://github.com/micworg/stir/blob/master/images/schematic_leonardo.png" width=500>
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<img src="https://github.com/micworg/stir/blob/master/images/schematic_promicro.png" width=500>
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<img src="https://github.com/micworg/stir/blob/master/images/schematic_uno.png" width=500>
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</p> |