Help me find a use for my old aquarium (without fish)?

Hi :) I have an old fish tank / aquarium that's the tall polygon-style (like this - http://www.crystal-fox.com/webart/products_large/3385.jpg)I never seem to have much luck with fish sadly, so I'd like to find a non-fish but decorative way to use my pretty glass fish tank. I like candles, plants, pretty stuff like that.Any and all suggestions would be very much appreciated, thank you :)!

Posted by hsteel 10 years ago


Need help with diy LED project

Hello, I am wanting to light my fishtank by using LED's... it is a really big fish tank so this must be a custom job, and i am interested in this field of work. I understand the basics of DC current, and i can solder... but i am still a n00b! I have 100 LEDs just like these http://cgi.ebay.com/100-5mm-6000mcd-LED-Lamp-Ultra-Bright-Blue-LEDs-DIY_W0QQitemZ350034574270QQihZ022QQcategoryZ66948QQssPageNameZWDVWQQrdZ1QQcmdZViewItemand i was wanting to use like, 50 or more if you guys think i need it. I understand the need for resistors and my goal, if possible, is to use as few resistors as possible! since they are not readily available to me. My plan is to use two long separate strands with, say 25 LEDS on each. Is this possible if i can find a 12v+? is this possible?Do i need to use series or parallel wiring? ( i want to use fewer resisters)Can i make two separate strands using one power supplyWhich values do i need to use to find resistors? http://cgi.ebay.com/100-5mm-6000mcd-LED-Lamp-Ultra-Bright-Blue-LEDs-DIY_W0QQitemZ350034574270QQihZ022QQcategoryZ66948QQssPageNameZWDVWQQrdZ1QQcmdZViewItemThank you guys so much, I have been wanting to work on this project for a long time, but these questions have always kept me.

Posted by punx777 10 years ago


Fun and experiments with water - what is your favourite?

We all know that a fight with water bombs or building a water rocket with your kids can be tons of fun. But what about the things that other people might not even know about? A water drop generator for example can produce thausands of volts in electricity! Water can travel up through capilary actions! Water is even used to break massive rocks in cold climates clean and without the need for explosives! Even the simple task of freezing water for ice cubes is now a science of its own for most serious bartenders... One of my old time favourites involving the often weird proerties involved a very small BW TV and a fishtank. After a lot of cleaning and rinsing I placed a TV into a spare fish tank filled with destilled water. Some other tiny tanks were filled for comparison with tap water and other household liquids. Switching a LED on by placing some electrodes in water without a battery was easy to explain as a battery was just created. Showing that copper can tavel from a wire onto a coin was fun too. But most people got really stunned seeing a movie or the new play on a TV under water - after all we just learned water and electricity is a big no no... What is your biggest "trick" or experiment involving water that noone knows about?? I am working on ultrasonic HF/HV experiements trying to figure out why it seems that under certain conditions the water "produces" more energy in the form of gas, steam and light than what is put into the system from the electrical side of things. Once I can replicate some experiments and understand them I will post my results, so give a few decades please ;)

Posted by Downunder35m 7 months ago