Can a 9v 1A wall wart be used to achieve roughly 17V 500mA, using 2 LM317 adj voltage regulators?
Get a boost buck converter from ti. Com, and get some samples. Should be possible to get one to work fr you, but it might be worth considering going to a computer market or similar and picking up a old power supply unit for $10 and it will do this for you, and you can boost the 12v to anything higher that's needed.
The LM317 can only reduce voltage, not increase it. An adjustable power supply will often switch between taps on the transformer to reduce the power dissipation in the voltage regulator. For example a common 12.6V center tapped transformer could use the center tap for up to 6 volts out and the full winding for up to 14 volts out.
(those are specific numbers) I just want to know if its possible to use 2 LM317 (or any voltage regulator) in series to achieve twice the volts (no Amp boost). I'm asking because I would like to create my own Adjustable power supply, but from reading (and some knowledge) its not good to use a 20v wall wart for a power supply that might only use 3.3v (too much heat even with a heat sink), but if I was to use a 9v I might need more then that say 10-15V.... I doubt I would really ever need more then 500mA for any projects I might do... Thanks Edit: I know that the LM317 can only decrease, but can't two of them be used serially to increase it? (those are specific numbers) I just want to know if its possible to use 2 LM317 (or any voltage regulator) in series to achieve twice the volts (no Amp boost).
Edit: I know that the LM317 can only decrease, but can't two of them be used serially to increase it? Separate topics with commas, or by pressing return. Use the delete or backspace key to edit or remove existing topics.
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