Efficient way to regulate voltage - Electrical Engineering Stack …
WEBApr 2, 2012 · The voltage drop off will leave you with 5v. and a 9v is regulated as it is. The practical use of a Zener diode in the shorted out configuration would be AC regulation where power is abundant. Also with the Zener in series with no resistor you get higher available impulse currents with less down time leakage currents.
thevenin - How to find the Thévenin voltage? - Electrical …
WEBThe Thévenin equivalent consists of a single voltage source in series with a single resistor, together between points A and B. To find the voltage of the voltage source and the resistor value you consider two different load situations. 1. No load at all, like it's drawn. The circuit consists of voltage source, R1, R2 and R5.
What exactly is voltage? - Electrical Engineering Stack Exchange
WEBPatterns of voltage can hang in empty space. Voltage is a way of describing/visualizing/measuring electric fields. To describe e-fields, we can draw flux-lines between opposite electric charges. Or instead, we can draw the pattern of voltage, the iso-potential surfaces, drawing them perpendicular to the flux lines.
voltage - Easy way to figure out a LED's Vf in order to pick an ...
WEBJun 1, 2015 · Now you'll notice that by driving the applied voltage up we have driven the voltage across the resistor up, and that in turn causes the total power dissipated by the resistor to go up considerably. While 217mW is technically under the 250mW a quarter-Watt resistor can handle, it will get HOT. I'd suggest moving to a 1/2W resistor.
What, exactly, is voltage? - Electrical Engineering Stack Exchange
WEBAug 22, 2020 at 8:30. 1. For the purposes of understanding circuits, electrons are water, voltage is pressure, current is current, pipes are resistors, and Kirchhoff's laws apply. Diodes are check valves, inductance is inertia. Capacitors are a little harder to model with water. Magnetic effects don't correspond at all.
terminology - The various terms for voltage - Electrical …
WEBVpp is actually Voltage peak-to-peak, which has relevancy when speaking about time-varying voltage signals or output voltage ripple (like pulse signals or sinusoidals). Vo is commonly read as Voltage-Out and is typically the voltage of interest if labeled as such.
What is "forward" and "reverse" voltage when working with diodes?
WEBMar 3, 2011 · The reverse voltage is the voltage drop across the diode if the voltage at the cathode is more positive than the voltage at the anode (if you connect + to the cathode). This is usually much higher than the forward voltage. As with forward voltage, a current will flow if the connected voltage exceeds this value. This is called a "breakdown".
basic - How to get negative voltage? - Electrical Engineering Stack ...
WEBApr 6, 2021 · 133 1 2 9. 1. Basically, you get a negative voltage by calling the positive terminal of the power supply "Zero volts". – Peter Bennett. Apr 6, 2021 at 0:08. 1. If you desire a serious amperage, then two power supplies/batteries connected in series is a …
What is negative voltage? - Electrical Engineering Stack Exchange
WEBFeb 17, 2011 · A positive test charge q would add -2q to its potential energy (becoming less positive), while a negative test charge -q would accelerate in the other direction (+2V, from 3V to 5V), but also adding -2q to its potential energy (becoming more negative). In both cases potential energy decreases.\$\endgroup\$. – Eryk Sun.
How to reduce DC voltage using resistors?
WEBJul 10, 2013 · A simple solution myself is a voltage follower connected to the output of the two resistors, this will provide a high input impedance and therefore: the output voltage will be constant 4.5V. the opamp used as a voltage follower will try to provide as much current as the load requires. Here is a picture of what I am talking about: