Interactive LED Test 2 - First Of The Modules

Test 2 of the Interactive LED table.
This is a short video of one of the modules I created.

Concept:
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Designed to be inter-linked with other modules to build a table.

How it works:
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InfraRed light emmitting from the IR LED transmitter is beamed onto an obstacle (your hand/finger etc.) and reflected onto the IR Receiver (a reverse biased IR LED) which triggers the amplifier to turn on the green LED's.

In the circuit I am using an LM324 - Low Power Quad Operational Amplifier. This is due to the fact that the reflected IR creates a small voltage on the receiver (depends on variables however one test I did was around 150-200mV) and approx 16x gain so 2.4-2.6V on the output.

This project was more of a "Proof of Concept" and I have not gone any further with it... Hopefully when I get some time I might come back to this...

Category:

Howto & Style

Tags:

• LED
• interactive
• touch
• table
• module
• test
• IR
• infrared
• sensor

[multitouchy]

great results!

[Sambora500]

Thanks =)

[100roberthenry]

i guess this wouldnt work with a leather glove on?.....