Questions tagged [supercapacitor]
Very high energy-density capacitors, typically measured in farads.
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How does this supercapacitor over-voltage protection work?
I'm designing a capacitor discharge battery spot welder and came across this video on over-voltage protection for supercapacitors. How does the schematic shown at time 10:15 work? If I need to connect ...
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Is the overvoltage protection used in this circuit a normal way of doing it?
The circuit is from a clip on YouTube. VCC is from a stepper motor generator and varies between ~0-30 volts DC.
From what I understand, and please correct me if I am wrong, when the voltage gets too ...
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Inverse temporal power-law increase of DC voltage under the application of constant DC current
Is there any material in which the DC voltage follows an inverse temporal power-law increase, under the action of a constant DC current? This implies a situation in which a constant current, I, is the ...
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Is this device claiming to reduce electricity bill a scam? [closed]
I saw something on the net and I have no doubt that it is a scam. This advertises as 90% reduction of electricity bill in a houshold.
I have no idea what it does. From the looks of it it is just a ...
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Latching solenoid supply circuit / control
I have done DC motor control with an H-bridge circuit before. I used a 3.6 V, 9000 mAh (ERC26500) battery and had no problems.
Now I want to use a latching solenoid and I need 7.2 V for that, so I ...
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Leaving super-capacitor connected to power supply
I want to use a 1F-5.5V super-capacitor as a power backup for a 3.3V circuit. As I searched the internet I have to use a circuit for charging the super-capacitor to stop charging when the voltage ...
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How to spec a power supply for capacitor charging given the simulation and large requirements?
I am using the LT3751 as a capacitor charger for a large capacitor (30mF) and am trying to get an idea of the kind of power supply I would require in order to come close to the simulation charge time. ...
user298907
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Wont the 6v charging voltage destroy the 3.8v super capacitor in this circuit sculpture?
I'm impressed with the circuit sculpture given at following link and want to build one for myself.
https://www.bhoite.com/sculptures/tiny-cube-sat/
For circuit diagram pls see this https://www.bhoite....
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Charging supercapacitors with reversed polarity
I bought six supercapacitors and connected them in series to get a total voltage of 16.2 VDC.
The product's Mouser No is: 723-BCAP0450P270S18, Mfr. No is: BCAP0450 P270 S18, the datasheet can be found ...
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Boost converting 0.5V PV output to charge a super capacitor
I want to charge three 2.5V 700F super capacitors in series (7.5V total) to a precise 6V so that I avoid overcharging a single capacitor in the string. (Conservative 80% voltage to avoid having to ...
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Can a memory backup supercap hold on for more than 2 weeks?
Most RTC chips have a VBATT input for backup power supply; besides a battery, you can use a supercap there, e.g. using the following scheme:
simulate this circuit – Schematic created using ...
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Using capacitors as a battery back-up
I have a device which is operated from a 12 VDC 10 A power supply and draws 8 A in operation.
I need to run this device for at least 20 seconds when the 12 V power supply is lost upon a power failure. ...
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Simple supercapacitor fast charging circuit
I have some 2.7 V, 500 F supercapacitors and I would like to quickly charge them from two 18650 VTC6s in parallel.
I made this simple circuit and I would like to make sure it works before I build it.
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Is it possible to charge a large 30,000uF capacitor to 250V in 5 seconds?
The energy of the capacitor would be E = (1/2)CV^2 = (1/2) * (30000 * (10^-6)) * (250^2) = 937.5 J
That would be 937.5 J / 5s = 187.5 W
If I had a 12V power supply then the current would be 187.5W / ...
user298907
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Why conductor having charge(let say 1C) have tremendous potential but same conductor used in capacitor have low voltage?
When we talk about electrolytic capacitors or the supercapacitors (EDLC), then we know that we can store large amount of charges in it.
Since in electrolytic capacitors the aluminum plate acts as ...
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