How can I decrease a DC voltage without a resistor
24335
How can I efficiently drive an LED?
155126
How to transform 5V into 12V?
48777
Resistor requirement for 3.3v
77248
How to scale and shift voltage signal?
40711
Getting higher power output by using more resistors
140330
For a lower voltage drop one could use Schottky diodes, but what are the disadvantages of Schottky's?
49485
How to use a transistor to pull a pin low?
121428
How to amplify and offset the voltage in an opamp?
14016
Least expensive way to boost DC voltage
134426
How do I convert, lower, or raise voltage?
6152
Automatically switching from 9V battery to DC wall adapter on insertion
42977
Why is there an "electric" potential drop across the resistor?
30292
How do I calculate the resistor value for a simple LED circuit?
138234
How do I convert poles and zeros of a transfer function into a circuit / required circuit components?
156010
Using a diode to ensure current flows in only one direction, without causing a voltage drop
114801
Amplify current and voltage to preserve battery
78058
Is there any option to store AC voltage?