Nurse Alert System

[Demon]

Nice.

Maybe resistors on those LED segments?

Robert

[Fidelis]

Thanks Robert, yes in real life, limiting resistors will be needed.

[BobK]

Hi Fidelus,
Are you planning on using this commercially? If so you might want to contact U.L. for the requirements for getting a U.L. listing which will be required by your customer's insurance company. 10 years ago I designed, built, and installed a system that covers an emergency pull cord system and a check in system for 160 apartments and asked the customer for their specific requirements. He didn't provide any so they got a pretty nice system without spending a lot of money on U.L. testing. This should really be left up to the companies that make systems for this purpose.
BobK

[richard]

some thoughts

what happens if two or more rooms signal simultaneously ?
what happens if the nurse is absent/distracted for more than 6 seconds ? there is no record or indication of a calls source or that a call ever happened .
do all rooms have equal priority ?

[Fidelis]

Thanks guys,
The System presented here is really basic and has no record for missed events. However, making it into a commercial system will not be a bad idea, i think.
Thanks.

[Demon]

Ideas on certification:

http://electronics.stackexchange.com...cs-led-product