LED intensity, LCD Display contrast, Absorption Reading and Blank button boards.

pot button boards.JPGTwo more small assemblies were built for testing on the bench and now transferred to the prototype. On top are the blue and green LED intensity potentiometers to set the blank voltage readings in the range 600-900 units.  The bottom board has the potentiometer to adjust the LCD contrast, and the two buttons.  The top button takes the absorption readings for green and blue light, the bottom button takes the blank reading, which is the level of led light intensity in a sample of water without the indicator dye in it.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s