dudewheresmybass Posted January 24, 2012 Share Posted January 24, 2012 Hi. I'm trying to decipher a symbol printed on a bubble machine so I can buy a psu to run it The symbol in question has two horizontal lines the uppermost being just a straight line and the lower of the two being broken ( ie a series of hyphens) Am I right in thinking this refers to the polarity of the supply? Cheers for any help you can offer! Quote Link to comment Share on other sites More sharing options...
icastle Posted January 24, 2012 Share Posted January 24, 2012 Nope. That symbol means it's a DC power supply. Quote Link to comment Share on other sites More sharing options...
dudewheresmybass Posted January 24, 2012 Author Share Posted January 24, 2012 fair do's thanks very much mate Quote Link to comment Share on other sites More sharing options...
icastle Posted January 24, 2012 Share Posted January 24, 2012 No problem. Polarity symbols look like this: This one indicates a negative tip. If the + and - symbols are reversed on the diagram, then it's a positive tip. Quote Link to comment Share on other sites More sharing options...
dudewheresmybass Posted January 24, 2012 Author Share Posted January 24, 2012 Thanks for the clarification there. There is no symbol aside from the one mentioned above visible on the machine unfortunately. I did have an adaptor for it, but it got totally destroyed after a show last week, when it got dropped on the floor and run over! Thanks again for all of your help Quote Link to comment Share on other sites More sharing options...
icastle Posted January 25, 2012 Share Posted January 25, 2012 Well a bubble machine is usually just a fan blowing air and perhaps another one to rotate the 'dipper' through the bubble liquid. DC motors aren't fussy about polarity (reverse the polarity and it'll just spin backwards). I'd suggest trying a positive tip to begin with and if the fan 'sucks' instead of 'blows' then turn the polarity round to make it spin the other way. Quote Link to comment Share on other sites More sharing options...
icastle Posted January 25, 2012 Share Posted January 25, 2012 [quote name='Johnston' timestamp='1327451007' post='1511649'] I thought that was a diagram from one of them surgeons using dodgy implants. + make this bit bigger - make this bit smaller. [/quote] You need to get out less... Quote Link to comment Share on other sites More sharing options...
dudewheresmybass Posted January 25, 2012 Author Share Posted January 25, 2012 XD Quote Link to comment Share on other sites More sharing options...
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