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Im looking for 20W/h (at 5V) consuming system for running with solar panel. Is it possible with current miners? If you say it will never be profitable I say 5$ for a month is big target for me. The currency can be different than bitcoin. Im so beginner.

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    5$ might be worth it for you, but keep in mind, the expenses to build such miner will probably be 50-100 times that. So before you have earned that back, and top it with 5$.... – Viezevingertjes Aug 15 '16 at 9:50
  • Can you give some name of example miners? – user30878 Aug 15 '16 at 10:04
  • Pretty any miner that runs on linux will do, if you would use the raspberry pi. – Viezevingertjes Aug 15 '16 at 13:08
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While there were a few USB stick miners very early in the game, rigs have rather gotten bigger than smaller since then.

According to Mining Hardware Comparison the smallest rig that is still shipping, Antminer U3 Batch 2, needs 63W.

Its energy efficiency is only one tenth of the current best equipment though, and you'd have to invest at least $40 which you likely would never make back: In the ASIC-age, is it worth starting mining Bitcoin at home?

  • Oh, this was my 500th answer on Bitcoin.SE. Congratulations to myself. ;) – Murch Aug 23 '16 at 16:51

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