I am looking for a simple photoelectric circuit that rings a buzzer when a beam of light is broken. It should contain these 4 elements. A: Photo emitter (LED) B: Photo detector (diode or transistor) C: Solid state relay and D: Buzzer - like in a smoke alarm, for instance. The relay (C) sets off the Buzzer (D) when the beam of light from the emitter (A) is obstructed from reaching the detector (D). The buzzer keeps going as long as the beam is obstructed. The circuit can be driven by a DC source (battery) or an 110V AC source. I need a working circuit assembled on a bread board or PCB. The components should be easily available (e.g. [login to view URL] or radio shack).
## Deliverables
1) Complete and fully-functional working circuit as well as complete circuit/schematic.
2) List of all material used to build the project
3) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables):
a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment.
b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request.
3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement).
## Platform
Not applicable