Questions tagged [supercapacitor]
Very high energy-density capacitors, typically measured in farads.
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Cyclic Voltammetry for a Capacitor - Positive Current, Potential is decreasing?
In the boxed red region, why is the potential decreasing when the current is still positive? To my understanding, when the current is still positive (i.e. not changing direction), the capacitor will ...
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Supercapacitor discharging fast when there is no discharge path present
This question is a continuation of my previous question, but different from that.
I am using a PCA85073A RTC in my design. On some boards, the supercapacitor discharges very fast (5 V to 1.1 V in half ...
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What will happen if I2C pull up voltage became zero
This is a continuation of this question.
In my board RTC I2C lines are pulled up to controller supply voltage and the controller supply voltage will be off when the system is off.
At that time also ...
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Super capacitors derating
I want to use supercaps in a system for minimal power interruption backup (1-2 seconds). My systems works at - 40 to 85°C.
I have seen that supercaps are usually rated for 1000 - 2000 hours at max ...
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Why is my super-capacitor self-discharging so fast?
I'm experimenting with a night light powered by a mini solar panel charging a super-capacitor instead of battery. (I know, I know. It's not recommended for this usage but I want to try it anyway). It ...
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RTC super capacitor is discharging very fast
I am using a PCA85073A RTC in my design. On some boards, the supercapacitor discharges very fast (5V to 1.1V in half an hour.)
This happens when we turn off 5V_uC.
The circuit is given below.
All the ...
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Wide input voltage capacitor charging control
I'm working on a project in which we are using a bank of inexpensive 100 μF caps (up to 20 of them) to keep a microcontroller powered up long enough to do housekeeping for shutdown when the main power ...
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Supercapacitor minimum voltage
I want to use a supercapacitor ( Lithium Ion 3.8V 30F) to be charged only by a small solar panel. And the circuit will only do something between between 2.7 and 3.3 V. In standby mode the circuit will ...
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Wire size for 16 V, 83 F capacitor [closed]
I have a capacitor bank circuit (16 V, 83 F). I got it from AliExpress. I am planning to install it in my car parallel to my car battery (car battery capacity: 12 V, 50 Ah). Could you please suggest ...
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Test circuit for a solar panel used to power a supercapacitor
I was hoping to power a device with a supercapacitor that would provide power when there isn't light available, so essentially I just need the solar cell to charge the supercap as fast as it would ...
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Super capacitors and getting same current burst out every time using boost converter?
I need to use a supercapacitor to power a circuit for short pulses evenly. So with the same current out every pulse. To do this, I thought to use a boost converter to get a constant current out every ...
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Replacing Li-ion battery in a game controller with a supercapacitor
My game controller's Li-ion pouch battery is swollen and has died. I was thinking if it was possible to replace the internal battery with capacitor/supercapacitor. I don't need the wireless ...
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How to replace a lithium-ion battery with a super-capacitor in electronic device?
I have a mobile WiFi router, which contains 3.7 V pouch lithium-ion battery. But I use it only in one fixed location where the charger always plug in. The problem is, the Li-ion pouch cell will puff ...
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Low power circuit design for powering an e-paper display
This is a follow up to my last question on Low power circuit design for turning an LDO on/off at specific voltage levels, where I wanted to find a low power way to turn an LDO on/off at specific ...
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Low power circuit design for turning an LDO on/off at specific voltage levels
I am designing a low power circuit that uses the TPS61023DRLR for energy harvesting, charging a 1.5F ...
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