All Questions
Tagged with supercapacitor current
9
questions
0
votes
2
answers
297
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USB inrush current limiting, charging super capacitor
I am trying to charge a supercap over USB. I understand I need to limit the current (ref: usb.org)
This has been discussed a lot here, for example: here and here, but I believe my requirements are a ...
0
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0
answers
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Is it safe to add a big capacitor in parallel to a power supply output?
I have an application which uses a 1000W standard PC power supply, drawing continuously around 300W. However, sometimes there are short power surges of ~800W or more, which I believe triggers the ...
0
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0
answers
184
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Battery options for 500mA load
I need to energize a load with 500mA current for 10 seconds. Voltage doesn't needs to be constant but can be in between 0.1v to 1v. The application has size constraints so I can only use a button cell ...
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-2
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3
answers
454
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Limiting discharge current of super capacitor
I'm looking to use super capacitors to heat up a short length of NiChrome wire. My caps are capable of supplying far more current than needed to get the wire up to temperature (about 6 amps). What I ...
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1
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How to do high switched current from small solar
I am working on a small, solar-powered application that makes use of RF and a few higher-power sensors. Those will only be on for a fraction of the time, but might consume 1A-2A at 3.3V.
The ...
- 1
0
votes
1
answer
181
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Powering a li-ion battery from a TEG
For a project, i would like to power a li-ion battery from a TEG.
For that, i use a step-up converter called LTC3109 developed by linear technology but it was limited in current. I intend to create a ...
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1
vote
1
answer
189
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How should I sense the presence of current in Solar-Supercapacitor circuit?
I am trying to measure the presence of sunlight through current sensor circuit. I don't want to use LDR as it may give a false alarm if something occludes the small LDR window. Will using the board ...
- 75
2
votes
1
answer
166
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Trouble calculating time to drain a capacitor
Introduction
I'm having trouble producing an equation that involving my MAX756 boost chip, a load and my 1.5F capacitor.
Basically I'm trying to find out how long it would take for a 1.5F capacitor ...
- 21
1
vote
1
answer
915
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How to draw constant current independent of voltage for capacitor testing
I have a 150 farad 2.7 volt super-capacitor. I want to test the cap under various loads, .1 amps, .5 amps, and 1 amp. I will be creating a graph of the voltage over time.
How can I constantly draw ...
- 10.2k