All Questions
Tagged with supercapacitor mosfet
12
questions
0
votes
1
answer
58
views
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 ...
- 85
0
votes
3
answers
175
views
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 ...
- 101
0
votes
0
answers
258
views
Turn off below a certain voltage
Hi I have a small Uc taking samples and sending results powered by a simple solar panel and supercap to get it through most of the night. It works but early in the morning when power is just enough to ...
- 263
0
votes
1
answer
148
views
Standalone current limiting circuit for Ultracap banks
I've been experimenting with ultracaps for a while now and I have a very specific problem:
I use the ultracapacitors to compensate for line inductances and general power filtering. When I install a ...
- 25
10
votes
5
answers
2k
views
MOSFET broke after attaching capacitor bank
I have a solenoid that has a coil resistance of \$0.3\Omega\$ and accelerates a steel projectile here. I've posted the schematics below.
Normal Version that acts as a control
The GPIO8 goes to 5V to ...
user229515
8
votes
6
answers
475
views
"Temporary boost" supercap
I have a 12VDC load (up to 10A) that functions correctly down to 8VDC. Sometimes (frequency: many seconds max, many minutes typical) the power source has a very brief (few milliseconds) drop to 7V. ...
- 125
1
vote
0
answers
176
views
I'm an undergrad building a railgun and I need assistance!
I am a physics undergrad that chose his senior project to build a low voltage railgun, however I am running into a few different issues.
1.) The paper mentions a "flyback diode bank" which I have ...
- 11
0
votes
4
answers
596
views
Supercapacitor backup circuit - why seperate charge and discharge path?
I am learning about super capacitors in a backup power application. I see a lot of examples using diode networks or FETs to separate the charge and discharge paths. Why is there so much effort put ...
- 337
0
votes
2
answers
170
views
P MOSFET turning on before gate threshold
I was simulating a P MOSFET, and for turning a P MOSFET on we need gate to Source voltage less then its threshold voltage. as per below simulation circuit at start VGS= 0, then there is no way mosfet ...
- 782
0
votes
2
answers
448
views
Noise on PWM before connecting to buck circuit
I have built a buck converter in the circuit configuration below in order to charge a supercapacitor. The PWM signal is being applied with an arduino and is in the place of the signal generator in the ...
- 21
10
votes
4
answers
20k
views
Controlling high current (1000A) with MOSFETs
I am currently designing a capacitive discharge spot welder and am running into the issue of switching.
I plan to use a few super capacitors in series to discharge around 1000A in a very short ...
- 1,050
1
vote
0
answers
951
views
Controlled supercapacitor charging with buck converter
I'm building a charging circuit for two supercaps (2.7V, 3000F each) in series. I've got a 12V supply and a buck converter rated to 15A, which I've set to provide 4.8V. I'm using balance resistors to ...
- 23