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  • dglad4 commented on Eric Brouwer's instructable I2C Relay Board8 months ago
    I2C Relay Board

    So the 23017 has an A and a B side and you've only used B (I found out why in the comments). In my application I want to use both A and B sides so how do I write to A as well?Additionally, how do you write to just one output as not to change the others. Say I wanted to turn on 3 but leave 4 and 5 on as they were, writing 00100000 would turn them off while switching on 3, correct? So how do I write only to one output without changing any others?

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  • How to Make a Dehumidifier (Thermoelectric Cooling)

    This is a terribly inefficient method to obtain water. You shouldn't drink the water you collect as it is either as the heatsink fins are a great breeding ground for bacteria, even more so when dust builds up. You could filter it and boil the water if you really wanted, but this is consumption we're talking about let alone the inefficiency of using a peltier."While peltiers are useful, they're not very efficient. Only around 5% of the electrical energy used to power them gets used for cooling."In addition, photovoltaic (solar) panels only make electrical energy out of ~22% of sunlight.In conclusion, yes it would work but you're better off taking fabric soaked in sea water, dirty water or even leaves from tree branches and having them sit in the sun inside a mini glass house. T...

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    This is a terribly inefficient method to obtain water. You shouldn't drink the water you collect as it is either as the heatsink fins are a great breeding ground for bacteria, even more so when dust builds up. You could filter it and boil the water if you really wanted, but this is consumption we're talking about let alone the inefficiency of using a peltier."While peltiers are useful, they're not very efficient. Only around 5% of the electrical energy used to power them gets used for cooling."In addition, photovoltaic (solar) panels only make electrical energy out of ~22% of sunlight.In conclusion, yes it would work but you're better off taking fabric soaked in sea water, dirty water or even leaves from tree branches and having them sit in the sun inside a mini glass house. The suns direct thermal energy (~55% of sunlight) will evaporate the water and it will condense on the glass/plastic.

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  • How to build a thruster for a homemade submersible or ROV

    Here it is! This will become an instructable or just video tutorial on its own but here's the latest testYet to attach it to the kayak and proer test. I have another fan to attach so it's not dead, I got too carried away haha.

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  • How to build a thruster for a homemade submersible or ROV

    This another one of those projects that have been put off, and I've been umming and ahhing about. But I've received all electronic parts and have just bought this to use for the drive:http://www.ebay.com.au/itm/131717439180I'm going to use a microwave cooling fan for the propeller as I said before as I have two different ones, theyr'e free from the bin and I can cut down the diameter of the four blades until I find the sweet spot for motor power draw and thrust.If this project fails, it's no loss as I can reuse everything but the motor and these are available:http://www.ebay.com.au/itm/322288735528Paddling isn't too bad but electric assist certainly increases how far you can go.

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