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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
With no resistor to limit the collector current, this transistor could draw as much as 2.8 amps, dissipating 25 watts until it burns up unless you have a big heat sink on it.
thx alot for the test circuit. Well, the tip42 appears to be working fine in the test circuit, i actually get a voltage reading coming fromt he collector. But, when i put it into my board for this schematic (see below), i get .3v where there should supposedly be some voltage more or less 8-9v i guess. Am i wrong or...
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