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Results tagged with voltage
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user 33899
Voltage, otherwise known as electrical potential difference (denoted ∆V and measured in volts) is the difference in electric potential between two points (adapted from Wikipedia). Voltage can be constant (DC) or varying (AC).
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Maximum safe voltage for underwater LED? [closed]
I want to illuminate a aquarium using 2x 10W (12V) underwater LEDs (for aesthetic reasons and also to eliminate the cooling problem).
Can I submerge the LEDs directly while the LEDs are powered by a …
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2
answers
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modify schematic to work at 5V (solar panel sun tracking system)
The motor is very small one. 11mA at 2V (minimum voltage at which it still starts spinning) running without load. Once I install the solar panel I expect to suck no more than 50mA. … So, the circuit needs to safely shutdown when the voltage provided by the solar panel is too low. In other words it should not start to randomly spin the motor when the voltage drops way below 5V. …
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Can I increase the no of operating hours of a battery without increasing its capacity?
The pulse width gets shorter as the voltage increases so I guess, the consumption remains the same not matter which is the battery voltage. … But the total voltage is now 14V. So, the battery pack can be used from 14V down to 8V. This is a 6V difference! …
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How to calculate heat sink for 60W LED?
I want to install 3x 20W LEDs on a 1.5m x 4cm x 3mm aluminum bar.
Is the bar large enough for 60W ?
Known:
From literature I have found that about 2/3 of LED's power is converted into heat.
Using th …
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answer
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How to power a 150W motor with rechargable bateries?
Question: Can I use a higher voltage (like 30V) and then a regulator or PWM?
If I used a 24V battery pack the motor will go slower as the battery gets discharged. …
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answer
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Maximum current through an LED
However I know that the voltage is 3.2V-3.6V and the power is 1W.
Is it correct to assume that the maximum current is therefore 0.27A ?
i=p/u=1W/3.6V …
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2
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Running COB LED without driver (undervolted)
(I know, it is more like a "guess" question but no other documentation is provided with the LED)
There are COB LEDs out there that are "natively" running at 26V or 32V is the minimum voltage for a high …
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Is the "dc impedance" and ESR the same thing?
In a super-capacitor, what is the DC Impedance? Is it the same as ESR (Equivalent Series Resistance)?
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How to calculate voltage after rectifier?
It calculates the voltage after rectifier as
Vdc = Vac * 1.41
It seems it forgets the voltage drop on diodes (0.7V + 0.7V). … Is the site accurate or we should we take into consideration the voltage drop on diodes?
Update:
For 12Vac I get 15.9Vdc after the rectifier (4x 1n4007 & 470uF capacitor, no load). …
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