Instructions on how to make an Arduino millivoltmeter for use with CLEAPSS colorimeter or other low-voltage applications.  The accompanying zip files GL257a contains the Arduino code & GL257b soft.. more

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The zip folder contains the Arduino code for the millivoltmeter detailed in GL257 Make-it guide - Arduino millivoltmeter. 

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The zip folder contains the software which enables readings from the Arduino millivoltmeter (see GL257 Make-it guide) to be displayed on a computer screen or larger screen via a data projector.

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Gives guidance on general fieldwork including specific measurements and techniques. Detailed guidance is included on measuring substances in the soil, water and air, and electronic measurements such a.. more

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