Activities/Turtle Art/Using Turtle Art Sensors: Difference between revisions
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===Using the LDR to measure your pulse=== | ===Using the LDR to measure your pulse=== | ||
Each heartbeat temporarily increases the amount of blood in your fingertip. Cover the LDR with your fingertip and hold near a bright light. You can see your pulse as a variation in the measured resistance. | Each heartbeat temporarily increases the amount of blood in your fingertip. Cover the LDR with your fingertip and hold near a bright light. You can see your pulse as a variation in the measured resistance. | ||
[[Image:Screenshot of Turtle Art Activity pulse-1.png]] | |||
You need to experiment with the constant 3000 or the distance from the light to get the display onscreen. | |||
==Photovoltaic panel== | ==Photovoltaic panel== | ||