All Questions
Tagged with supercapacitor charging
20
questions
3
votes
2
answers
829
views
Supercapacitor to prevent temporary power supply voids
Hello and sorry for the improper title!
We need to transmit about 50 W (5 V 10 A) through a slip-ring-ish to drive some rotating electronics and LEDs.
We are using a 5 V 25 A LED power supply.
We are ...
- 59
0
votes
0
answers
93
views
Super capacitor charging circuit
I am trying to build a circuit to power a system for about 30s-1min after we have a power loss (12V going off), so my microcontroller and radio transmitter can send a message alerting the power loss.
...
-1
votes
2
answers
346
views
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 ...
- 289
1
vote
1
answer
370
views
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
1
vote
0
answers
68
views
Component protection and charge optimisation for Solar + Supercapacitors
What are the best protective practices for solar cells and supercapacitors when they are used for small outdoor projects? Moreover, are there any way of widening the useable voltage output range of a ...
- 506
0
votes
0
answers
218
views
designing a supercapacitor balanced charger circuit
I'm currently designing a super capacitor based emergency power supply for a system. The operating voltage of my system is around 10~12 V. Therefore I'm using 4 2.7V supercapacitors in
series to gain ...
- 155
1
vote
1
answer
135
views
Finding practical solutions for discharging and charging a capacitor
I am wondering can I charge and discharge a supercapacitor at the same time like a battery.
I have 1.3V going into a 10F 2.7V capacitor in series with a 0.5 ohm resistor. I calculated it will take ...
- 81
1
vote
3
answers
2k
views
Charging 2 super capacitors in series
I have recently received my order of 2 2.7V 500F super capacitors from eBay.
After much searching, my yet unanswered question is:
Can I connect both of these capacitors in series and charge with 5V ...
user235520
0
votes
2
answers
454
views
Ultracapacitor initial voltage drop during discharging
I've been building a test stand for ultracapacitors, with very simple schematic looking like this:
simulate this circuit – Schematic created using CircuitLab
The resistor on the bottom is to ...
- 84
0
votes
1
answer
478
views
Complete discharging of Initially charged capacitor through Inductor
I have been trying to simulate a parallel resonant circuit in Pspice . The idea of the circuit is to discharge C18 (Cin) completely (This cap is initially charged to 1.3 V) through the inductor and ...
0
votes
3
answers
2k
views
Can you fully charge a super capacitor at a lower voltage (than its max rating)
Is it possible to fully charge a super capacitor at voltage lower than its listed max rating?
Example: could I charge a 5,5V or 6V super capacitor using only 5V.
In case it matters, two example super ...
- 467
-2
votes
4
answers
5k
views
Can I charge 2.7 V 500 F capacitor with 12 V car battery?
Can I safely charge capacitor 2.7 V 500 F with 12 volt car battery? Have tried with a 3 V charging adapter and 12 V light bulb as resistor but doesn't take charge. I didn't want to try 12 V in case it ...
5
votes
2
answers
4k
views
Super capacitor directly on the power supply
simulate this circuit – Schematic created using CircuitLab
I have an atiny with an RF emitter which would detect the 220V AC off in the circuit and send a radio signal.
to do this I use 2 ...
- 191
0
votes
4
answers
918
views
High-power capacitor charger
I am trying to put together a circuit that can charge a 3000 F Maxwell supercapacitor in about 10 mins.
I am looking to use a 150 W laptop adapter and a buck converter. Here are the problems that I am ...
- 1
0
votes
1
answer
138
views
Charging supercapacitor parallel with different sources
Is it possible to charge one supercapacitor with multi voltage sources in same time? All rated at near by 4V for example, 4.05, 4.1, 4.0 volts.
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