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Unfortunately finding a source for the Hydrochromic ink is not very easy. The only source of a small quantity I was able to find was a site in the UK for £8.99 for 25ml.(about $13 US) and they do not ship outside of the UK. Also I have learned the idea of a color changing umbrella is already out on the market but I do like the idea of possibly designing and creating your own umbrellas, clothing or what ever but I cannot commit the funds to purchase the amounts dealers sell. Also time is a big factor.. lots of projects so little time.
This is a very nice idea!..Gave me the thought of using color changing fabric really can watch the purple rain fall
I have previously drilled a small hole near the bottom of the cup to allow the trapped air to escape and also when a bit of solder escapes from the hole when soldering the wire in place, you know it will be secure.
FTDI USB Adapter Based DMX Transmitter With Isolation
Dirt cheap Arduino LED light bar!
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