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1  Other / CPU/GPU Bitcoin mining hardware / Electric heaters on: November 15, 2013, 02:10:57 PM
With the cost of mining being dominated more and more by the electricity bill, I started thinking in embedding miners in these appliances called "electric heaters"  (see pictures ), and then sell them at a discount price (bitcoins mined to my address) or full price but with the ability of sending the bitcoins mined to any address. These heaters are not the typical HVAC units that use heat pumps but simple "electricity burners" that are very inefficient. The people buying these would waste the energy anyways.

The miner should be some tiny linux computer such as a raspberry PI with a GPRS modem and an array of bitcoin ASICs that will be insulated and submerged in the oil that these heaters use.

Some numbers:

A heater typically burns 2KW

Assuming a heater stays on for 8 hours a day during 3 months = 720 hours

Asic efficiency 1.73 GH/s per KW  (Black Arrow Prospero X-3)

Total GH/s ~  1.73GH/s x 2KW  ~  3.5 GH/s

Earns x hour ~ 1.48 USD / 24 ~ 0.06 USD  (today)

Earns x year ~ 0.06 * 720 = 44 USD

GSM bill x year ~ 60 USD

So if we are not taking into account the capital expenditure we are almost even. Give one year more and prices of ASICs and all electronics will fall, bitcoin will probably raise and we are on the path to profit.
2  Local / Mineração em Geral / Need to buy software for bitcoin on: August 14, 2013, 09:47:21 PM
I need to buy 4 (four) licenses of MSCAD Pro , a brazilian software :
I pay BTC, and I'd like to use LocalBitcoin Escrow service.

The 4 licenses are ~ 1200 BRL. Give me a good price in BTC and let's start using bitcoin for real.
3  Economy / Exchanges / no trades @ mtgox ? on: May 13, 2013, 09:27:10 PM
It's been 10 minutes and I see no trading activity in mtgox. The site freezes sometimes, and the last transaction was for 116.05 a while ago. There was a huge sell order of 1k btc for 116.66 but now is gone. says it is connected to the websocket api.

4  Other / Beginners & Help / btc and US taxes on: February 17, 2013, 02:25:30 PM
I usually work as a contractor for a US based company and I live in Argentina. I signed off a W8EN so they do not withhold 30% and they usually pay by wire transfer.

I wonder if there is a way they can pay me in BTC, how would that look in their books? Is there an accountant that can give me some pointers to try to convince them?

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