Prototyping infrared micro power receiving block.

Status: Closed
Prize: €100
Entries Received: 8
Winner: sbarbarelli

Winner

Contest Brief

The block has to be able to transform infrared radiation, around 940 nm, to electrical output of 3-4 V, 40 mW or more.
Requirements:
Block circuit is self-powered from the abovementioned infrared energy source (without additional battery, etc).
Block has to be restricted to size less than 1 square cm, and less than 2-3 mm height.
Block components have to be common/accessible/inexpensive, preferably of SMD type.
Possible solution is "Joule thief" schema with PIN Photodiode. However, other solutions are welcomed.
Project's result has to be presented as EasyEDA compatible schematic and PCB, with video proof of its functioning.

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Employer Feedback

“Santiago demonstrates the best knowledge and problem understanding among all participants! Also he is very pleasant and easy person for communication. ”

shatil9, Ukraine.

Top entries from this contest

sbarbarelli Argentina

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ArtistGeek Egypt

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zalmip0001 Bangladesh

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malimali110 India

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sahilsharma19810 India

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Public Clarification Board

dev904536
- 3 months ago
i am work seriously
- 3 months ago
1. Contest Holder
  - 3 months ago
  Please, show me what have you done
  - 3 months ago
dev904536
- 3 months ago
hello i almost complete your project but you rejected me dear.
- 3 months ago
sbarbarelli
- 3 months ago
Hi! good project! very interesting...
I have a question...the complete block can measure up to 1cmX1cm base by 3mm height? including julius thief?
I am working on the problem..
Thanks..
- 3 months ago
View 2 more messages
1. sbarbarelli
  - 3 months ago
  Hi again!
  I am working on this project. I have already managed to make (and measure) a prototype of a very small "julius thief" that delivers the requested power; unfortunately I still do not get the pin diode components that I consider most appropriate.
  I have a question... do you need the 40mw continuously (as long as there is infrared radiation of course) or do you only need them periodically? Thanks!
  - 3 months ago
2. Contest Holder
  - 3 months ago
  Hi, Santiago, and sorry for delay with answer. Freelancer doesn't notify about posts... Uninterruptible power source is preferable, but if you achieve good efficiency, interruptions will be acceptable too. If you are asking about longevity of block working, it will work during periods in order of several hours
  - 3 months ago
EngDarwishelectr
- 4 months ago
what is the kind of Transmitter(Transmitter IC or module )? it can be remote control mobile device just mention the transmitter module to get the ic number
- 4 months ago
View 5 more messages
1. Contest Holder
  - 3 months ago
  No, it shouldn't, but it is acceptable too
  - 3 months ago
2. Contest Holder
  - 3 months ago
  I have updated project description: "Block circuit is self-powered from the abovementioned infrared energy source (without additional battery, etc)." Please, revise your circuit. Also a LED (D1), what is it for? I don't need it. Is it for load simulation or for indication purpose?
  - 3 months ago
Contest Holder
- 3 months ago
I have updated project description: "Block circuit is self-powered from the abovementioned infrared energy source (without additional battery, etc)." It seemed obvious for me, but I have to admit that it is not obvious for others...
- 3 months ago