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/diy/ - Do It Yourself

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>> No.2404255 [View]
File: 264 KB, 564x373, high side driver.png [View same] [iqdb] [saucenao] [google]
2404255

>>2404247

a lil old TO-92 transistor is gonna get burning hot at 200mA.
200mA is also the typical max current for the 'duino.
but when idling, it's less than 50mA, so you should be okay on that end.
however, you committed a capital sin by interrupting the ground.
you never do that coz of ''too many reasons to go into''.
so, redo your shit: switch the 3.6V power line using this circuit.
no only is it the right thing to do, it also means your circuit is gonna get precisely 5V (no transistor losses)
(lower the resistor values by 10x to ensure it works ''real good now'')

>> No.2390017 [View]
File: 265 KB, 564x373, high side driver.png [View same] [iqdb] [saucenao] [google]
2390017

>>2389991

your circuit is positively retarded.
even if you flip the collector and emitter, as you said in later post.
you cant use a PNP with a 2V base signal to output 5V.
that's coz to turn the PNP off, you have to decrease the the BE junction to less than 0.6V
so if you apply 0V at the base, you get 5V across BE.
if you apply 2V at the base you get 3V across BE
neither is below 0.6 so the transistor is never off.
what you want is pic related instead.
(the resistors in pic are kinda high, should reduce by 10x)

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