i have an adapter that its output is: DC 4.9 volt and 450 m ampere i want use this adapter for running three 6 volt dc motors but the adapter output current is low, so i want amplify that. can i do this with transistor? and which transistor should i use? the adapter would be damaged if the motors draw this current??
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\$\begingroup\$ Noooooooooooooooo you can't. \$\endgroup\$– WhatRoughBeastCommented Jul 3, 2015 at 23:57
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\$\begingroup\$ can you explain more please??? \$\endgroup\$– ramonCommented Jul 3, 2015 at 23:59
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\$\begingroup\$ The maximum energy delivered by your adapter : 4.9V * 450mA = 2.205W cannot be 'magically' augmented without additional power sources (a battery, solar panels, a nuclear power plant..). Else, you would have invented a perpetual movement device. \$\endgroup\$– GrabulCommented Jul 4, 2015 at 0:07
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1\$\begingroup\$ @ramon - "can you explain more please???" Sorry, but no. You clearly have no faint idea how transistors work, and I can't explain it in 500 characters. Go do some studying. \$\endgroup\$– WhatRoughBeastCommented Jul 4, 2015 at 0:15
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\$\begingroup\$ When I was a kid I thought: hmm, a transistor amplifies current. So empty battery + transistor = full battery :-) Obviously it doesn't work like that. So I studied electronics and now I understand why :-) But you don't have to go that far, reading some books about hobby-electronics will get you started. \$\endgroup\$– BimpelrekkieCommented Jul 4, 2015 at 15:55
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1 Answer
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Short answer: no.
Long answer: That power supply plus a transistor can act as a switch to let a bigger current pass through (that came from another power supply). So you're better off using that bigger supply in the first place. You cannot magically increase a power supply's current and/or voltage, unless you open it up and mess with the internals, which would most likely kill you or burn your house down.
