All Questions
Tagged with supercapacitor circuit-design
9
questions
4
votes
1
answer
1k
views
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 ...
- 2,593
0
votes
2
answers
136
views
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 ...
- 11
0
votes
0
answers
155
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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 ...
1
vote
1
answer
432
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Help with supercapacitor charging circuit
I need to design a circuit to charge a capacitor from 0 to 2V. The circuit should not be that complicated and no matter the type of capacitor, it should never exceed 2.7 V when charging. The capacitor ...
-1
votes
2
answers
819
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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.
...
3
votes
3
answers
2k
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Raspberry Pi: super capacitor on battery loss
I am looking to provide power to my Raspberry Pi upon power loss from the 5 V power supply. It just needs to provide power long enough for the Pi to safely shut down (with the setup I have, I estimate ...
- 127
1
vote
1
answer
637
views
Back up power supply for microcontroller and servos
I currently have a simple circuit which lets me control a servo using an arduino and have everything working, but I need the servo to go back to the default position in the event of a power failure, ...
- 123
4
votes
3
answers
1k
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High Voltage ADC Measurements using a PIC and OpAmp
I need to make a device to measure voltage of a series stack of capacitors which will reach a maximum of 100V (DC only). On the schematic I have omitted several from the stack, balancing circuitry ...
- 93
0
votes
1
answer
1k
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Supercapacitor Bank Wont Charge w RPi Load
I am attempting to build a simple, mini USB UPS for my Rasberry Pi 3 to survive sudden, short-term voltage drops. I have built the working circuit below on a breadboard.
When the 5V supply is removed ...
- 25