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    Controlling lights, fans and pumps in hydroponics

    Thank you! that is what my limited knowledge has told me so far in the research I have done. I was hoping that I had overlooked some miraculous secret :( I have found small pumps, light arrays and fans that are powered by USB. Is there any app I can install on a Raspberry Pi that will let me...
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    Controlling lights, fans and pumps in hydroponics

    I have started to learn about hydroponics and am looking for ways to automate the processes without spending an arm and a leg. I would like to use a Raspberry Pi to control everything. Lights, fans and pumps need to be controlled. The on/off points change with the growing phase of the plants...
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    Online training!

    I have several projects that I would like to undertake but almost all of them need ( or would go more smoothly) with some knowledge of electronics. The most challenging one: I would like to build a small homestead with earthbags. I have found a claw that was designed to pick up things like...
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    Newb wanting to BT my van

    Thanks! It has been a long time since I have followed up on this thread because the vehicle became inoperable. Yes, I have limited knowledge of electronics, and I appreciate all of your opinions. The goal is (may still happen) to use voice recognition in a tablet coupled to the bluetooth to...
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    Newb wanting to BT my van

    I have a van that I am making a number of upgrades too. I would like to add power windows and mirrors to it without having to play "spaghetti wiring" with it. I also want to keep the window cranks so that I can open and close the windows with the engine or accessories off. I have a 9" tablet...
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    DIY battery pack

    I would like to build a battery pack that produces both 12 and 5 volts - I think USB is 5 volts and my tablet needs 12 v to charge, or at least to use. I would like to have some way to know the status of the battery, whether it is an lcd panel showing numbers or a system of 4 or 5 lcds that are...
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    Need help for a individual buttons to activate a computer

    Wow! Bonanza! I am hoping to find buttons that are 2" or so so that they are easy to touch/hit. I will search on those words to see what I can find. Thanks!
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    Need help for a individual buttons to activate a computer

    I teach primary school students English in Taiwan. I have a lot of multimedia "toys" but I find that they are not very effective because the students cannot interact with them. I would like to make a "device" that is a long cable - 12 feet long (more or less). There will be about 8 buttons on...
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