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/diy/ - Do It Yourself

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>> No.2032609 [View]
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2032609

>>2032270
draw in the voltage source from -3V to ground to make the KVL application more obvious

>>2032323
none, we're all sold as is for scrap here

>>2032378
super hysteresis is better than a latch. imagine one transistor controlled by the comparator output pegging one of the inputs to the appropriate rail, with a momentary NC switch to reset

>>2032539
>bring up the red a little
they're not designed to tell you that. they're designed to tell your OS that. the better ones are designed to also track brightness/color of ambient illumination and coordinate monitor brightness/color in real time

>>2032577
that's exactly how most current limited supplies work already, something like a diode-logic analog AND-gate. pic related is one low-precision implementation, drawn from memory. Q1 is a pnp pass transistor driven by current from Q2 controlled by the opamp. R4/Q3 is a simple current sensor that conducts when Iload * Rsense ≥ 0.6V, arranged here to steal base drive current from Q2 when in the overcurrent condition

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