Long distance reading

Good day

I want to develop a product that must be capable of reading a number remotely on request over a long distance.

The user has for example 100 items that he must be able to scan, like a barcode from a distance of say 15 meters.

The only thing that I could think of is that each item has a light sensitive switch and when you shine a laser light on it (from a custom handheld device), it sends a number to the handheld (user) with either RF or a high frequency sound?

Any ideas?

Quote:

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Originally Posted by koossa

The only thing that I could think of is that each item has a light sensitive switch and when you shine a laser light on it (from a custom handheld device), it sends a number to the handheld (user) with either RF or a high frequency sound?

Any ideas?

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Using a handheld device and aiming a laser light at a barcode tag from a distance of 15m is kind of challenging. People with shaky hands won't be able to use your product. Just a thought ;).

sounds like a challage i will being research at once :rolleyes:

Quote:

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Originally Posted by koossa

The user has for example 100 items that he must be able to scan, like a barcode from a distance of say 15 meters.

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• http://www.electronicspecifier.com/W...-15-meters.asp