Questions tagged [step-up]
The step-up tag has no usage guidance.
186
questions
15
votes
3
answers
2k
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LM2586 - Inductor Heats Then Burns
I'm designing a step-up constant current source to drive LED strips (nominal load voltage is about 54 VDC). Requirements:
Vin: 18..32 VDC
Iout = 0.2 A
Vout = 54 VDC (nominal) - 57 VDC (maximum)
...
- 36.3k
7
votes
1
answer
563
views
How can I rectify up to 85 kV?
I've recently gotten into eletrochemistry, and I found out that if you break through \$\epsilon_{0}\$ with a high enough voltage you can ionize various gasses. I've already wound a 1:1250 EE core that ...
- 151
5
votes
10
answers
4k
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Best approach to step down 220VAC to 160VAC?
Hey Electrical Engineers,
I'm a newbie to electrical engineering (I am a software developer by trade and am starting to work with Raspberry Pis and want to learn about basic circuit design).
My ...
- 167
5
votes
2
answers
704
views
Simple, compact 9V DC to 400V DC step up
I'm attempting to create my own Geiger-Muller counter based on an old, soviet STS-5 tube.
I want it to be as compact as possible. I don't want to use ready-made modules, like this one, instead I ...
- 61
4
votes
7
answers
1k
views
How is current dropped through a step-up transformer, when current is dependent on resistance?
Suppose you have a 1:10 transformer. You put in 12V and you get 120V out the other end. Now the current before the transformer would be
$$V=IR$$
$$I = \frac{V}{R}$$
$$I = \frac{12}{1}$$
$$I=12$$
(...
- 249
4
votes
1
answer
278
views
Zener instead of resistor divider on dc-dc converter feedback pin
This dc-dc converter steps up voltage from 3.1V to 7.5V. I'm curious about the unusual D2 zener + R3 resistor to set the output voltage, instead of the traditional resistor based voltage divider. I ...
- 89
4
votes
0
answers
240
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Can this Raspberry Pi UPS circuit work?
I created following UPS circuit to shutdown my Raspberry Pi 3A+ properly:
I would really appreciate if somebody can review my circuit. I know it's a little bit hard to read, but I'm sorry. I'm a ...
- 41
3
votes
3
answers
478
views
MC34063 step-up unstable operation
I am building a 3.3V -> 15V/100mA boost converter using MC34063. I have used formulas in the datasheet to calculate values of components. Then I spotted some oscillations in Vout and instability of ...
- 85
3
votes
2
answers
2k
views
3.7V to 5V step up not providing enough current
I'm trying to power up a circuit that consists of an Arduino Nano, 3x 3W stereo audio amplifiers (PAM8403), an audio player module and 20x RGB LEDs. The power source is a lithium battery 3.7V 500mAh. ...
- 423
3
votes
1
answer
203
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Boost converter not working with any inductor
So I have been trying to design and build a boost converter which steps 5 V up to 12 V. More specifically, the output is to drive a fan which runs on 12 V, 70 mA (nominally).
As could also be seen in ...
- 41
3
votes
1
answer
5k
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How does such an USB step-up 5V-12V work? [closed]
I just bought a cheap USB 5V to 12V step up converter:
Surprisingly, it works very well. There is few place for electronic components (maybe in the USB connector?), how can we do a 5V to 12V ...
- 1,946
2
votes
2
answers
487
views
Step Up Circuit does not work
I am using an IC as a step-Up converter in my PCB.
It is supposedly to increase voltage from 12V to 30V.
This is the chip that i used.
https://datasheet.lcsc.com/lcsc/1809251831_Diodes-Incorporated-...
- 1,369
2
votes
4
answers
739
views
Boost Voltage of Signal Generator Output (via Audio/Signal Transformer?)
Goal:
Have a frequency variable voltage of at least 200 V (more would be great), between 50 Hz and 8 kHz (sine wave, as pure as possible). The voltage is used as open circuit voltage (only drives a ...
- 167
2
votes
4
answers
1k
views
Stepping up three 3.3 V outputs to 5 V
I want to use the third solution from this answer to step up three of my GPIO pins from my Raspberry Pi.
Would I need to make one of these circuits for each of the pins or could I, for example, ...
- 25
2
votes
1
answer
532
views
MC34063A step up voltage converter
i need change 5v to 12v that it use to supply a device;
for this use MC34063A step up voltage converter;
this site can calculate the parameter.
i have problem all thinks is OK but i have same voltage ...
