Questions tagged [supercapacitor]
Very high energy-density capacitors, typically measured in farads.
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Design for passive power backup for ESP32 for a few milliseconds
I am designing a logger system with an ESP32 in which the logs are uploaded to the IoT cloud and parallelly logged to a local SD card. On Power loss detection, I want the ESP32 dump all the data that ...
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Use supercapacitor to power microcontroller
simulate this circuit – Schematic created using CircuitLab
I try to solar charge a supercapacitor C1. When it's fully charged, I use a Zener diode D2 to the gate of an logic MOSFET M1, which ...
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Charging a super cap with a Li-po battery while maintaining charge
I have a 3 V 100 F capacitor and 400 mAh 35 C battery, the battery is to be charging the super capacitor and maintaining charge until a button is pressed to discharge the super cap. I am stuck with ...
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Designing boost converter for a supercapacitor source and LED load
I have a 2.7 V 100 F supercap, that would equal 364.50 J of energy based on E = 1/2CV^2. If my load is a series of 4 LEDs with a stack forward voltage of 12 V and forward current of 3 A that would ...
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SuperCapacitor Charger with BQ25173
I am asking about supercapacitor charger with BQ25173 IC. I examined the datasheet and designed my circuit for about 13 mA, but when I built the circuit, the current that was needed to charge the ...
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Super capacitor causing overcurrent protection
I'm making a power-supply circuit for some MCUs using a battery charging-discharging protect module MH-CD42 (both input and output is 5 V).
The module's datasheet says it has a 0.3 seconds switch time ...
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Leakage current in supercapacitors stack
Given a circuit of four hybrid supercapacitors in series, connected in parallel with another branch of supercaps in series (4s, 2p), where the leakage current is illustrated as a parallel resistance ...
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Using capacitor bank in parallel with lead acid battery
I saw some DIY projects about boosting car lead acid batteries. A supercapacitor bank is connected in parallel with a lead acid battery to stabilize the supply.
However, in the market, I can only find ...
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How can I simulate a super capacitor in LTspice?
I am trying to simulate a super capacitor in LTspice but it is not giving me the correct discharge time as it should be theoretically.
Has anyone also faced this issue? Please let me know how to ...
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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 ...
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Is there any supercapacitor that is hermetically sealed?
Does high altitude affect supercapacitors?
At high altitudes mostly hermetically sealed capacitors are used, so is there any supercapacitor that is hermetically sealed?
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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.
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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 ...
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Help with power buffer using capacitors
Looking for some help on how I might be able to add a power buffer of around 1 hour to an IC using super-capacitors, and be able to recharge it within 5~15 minutes after a power disconnect.
Looked ...
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How does balancing via resistors work? Why isn't it needed inside of batteries?
I am building a hobby project - a sort of supercapacitor powerbank, where I basically connected twelve 500F 2.7V supercapacitors in series. Despite these capacitors being from same manufacturer and ...
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