Questions tagged [step-up]
The step-up tag has no usage guidance.
186
questions
4
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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 ...
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0
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0
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44
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MT3608L based step up power convertor not stable - seems caused by erase cycle of PICKit 4
I'm a hobby home cockpit builder, and making my panels myself. Panels have backlighting, for which I use LED's. To control the LED's, I'm using STP08CP05TTR having 8 constant current outputs. I use ...
- 147
0
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1
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49
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How to conveniently generate variable programming voltages (12V, 12.75V, 14V etc.) in an Arduino context?
I'm playing with EPROM/EEPROM's and I need various voltages. For one, EEPROM I need to be able to generate 5V, 12V and 14V at around 30 mA. Question is how I do that the easiest. I'm thinking I could ...
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0
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1
answer
35
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Creating higher voltage from DC motor
I have a DC motor (5 V, 600 rpm). I use it as a generator. It produces near 1.5 V max.
This voltage may differ while using it in the application and I can't control it. I want to raise this voltage to ...
0
votes
1
answer
95
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What is the "best" way to make a diy 7v rechargeable battery?
I have a device (the wii "sensor" bar, basically an IR LED array) that the literature says takes 7v. I can't find any battery offerings that come in 7v, but many that are 3.7v, so I am stuck ...
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0
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2
answers
47
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Step-up like logical "inverse diode" operation [closed]
In the same way that a diode lowers the voltage typically by 0.6V/0.7V, I would like to understand the minimum and simplest circuit to obtain the reverse, i.e. raise the voltage by 0.6V/0.7V compared ...
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0
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3
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131
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Design of a 50 Hz step-up mini transformer
I am a first-year B.Tech student majoring in electrical and electronics engineering. Currently, I am working on designing a 500 W mini inverter.
I have addressed all aspects to reduce the inverter's ...
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0
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1
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116
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Trying to get 5 V using MT3608 (step-up boost) but without success
I designed a circuit to generate 5 V using a 3.7 V battery and an MT3608. The main problem is that I can't get 5 V but just 3.5-3.9 V, even after changing resistors.
I tried everything:
Changing R1 ...
- 3
0
votes
1
answer
40
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Step-up power supply for motor [closed]
I know very little about electricity. I am a private detective. I am converting on older surveillance periscope to modern IP cameras. The periscope has several motors that raise/lower turn 360% and ...
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2
votes
1
answer
92
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Input of 20~23v, need output of 24v [closed]
I have a supply that outputs either 20v or 23v, I need to step that up so it is always a fixed 24v no matter what. How can I make sure it is always a fixed 24v?
Edit: This is for a coin hopper. It ...
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1
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65
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How does the step up booster in the attached schematic work?
There is a 3 pin SOT-89 package IC DC step up that converts 1.5 V to 3.3 V as shown in the picture.
My questions are:
Does anybody have a link to the datasheet of the 433p?
How does this circuit work?...
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0
votes
1
answer
44
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Combination of step up and step down feasible?
I have a model aircraft on which I am installing a LED kit of the same manufacturer. The EDF jet is powered by a 6s Lipo (22.2V nominal). The LED kit connects to the balancer plug of the battery and ...
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2
votes
2
answers
317
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Step up circuit burns protection diode
I have implemented a step up circuit using an IC. I implemented the component selection from the datasheet. This is its datasheet.
Image source: LCSC - AZ34063U datasheet
The step up feeds an H-...
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1
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2
answers
138
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Converting a fast-switching 0-2.5V input to TTL signal
Dear fellow engineers,
I am attemping to convert a fast switching (~ns) 0V - 2.5V pulse from FPGA into a TTL-standard (0V - 5V) signal. I have been browsing for voltage regulators online. Most of them ...
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0
votes
1
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63
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XL6009 control with MCU
I want to control some 20-30w led chip with mcu.They need 30-32V so i need step up for that. And thought about that cheap modules with XL6009. Is it possible to control them with PWM on EN pin?
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2
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2
answers
487
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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
0
votes
1
answer
88
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Power 12V DC Motor with 16.8V (4S Lipo) using PWM control mechanism
I have recently completed a DIY robot that uses 2x 18650 cells (max 8.4V) and a step up module to power four 12V DC motors (Pololu 20d). For my next prototype, I would like to get rid of the step up ...
0
votes
2
answers
130
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Reversing Wye-Delta [closed]
I have edited both the title and the body of this question because my real world example was not being understood as it had a lot going on and I did not do an good enough job of making it concise. Let'...
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0
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87
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How can I get a higher voltage from this boost converter built with an NE555?
I built a boost converter, but it only reaches 130V. I want it to drive a Geiger-Müller tube at about 380V.
Is there any posibility to get that voltage from this circuit?
I changed the coil to a ...
- 1
4
votes
7
answers
1k
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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
$$V=IR$$
$$I = \frac{V}{R}$$
$$I = \frac{12}{1}$$
$$I=12$$
(...
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0
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286
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Why use a DRV2700 high-voltage piezo driver in this application?
The DRV2700 from Texas Instruments is an integrated circuit for driving piezoelectric/capacitive loads at relatively high voltages (max. +/-100 V) while the supply voltage can be as low as 3.3 V. This ...
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86
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Why does the step up boost module say its for 3.7V but has an input of 4.5V
I want to use this Step Up Converter (Boost Module), (https://www.amazon.com/gp/product/B0B7JGJ67J/), to power a 12V .15A blower fan using a 3.7V 2500 mAh battery. The step converter says that it is ...
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0
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1
answer
97
views
Calculation of step-up / step-down output voltage
I am trying to build a step-up and step-down circuit from a DC-DC converter IC.
This is from the datasheet:
I have two questions in relation to this:
The value of the resistor in the red box. It ...
- 1,369
0
votes
0
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219
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How to drive 5V display with ESP32-C on 3.7V LiPo battery?
I'm using a ESP32C3 board (with integrated battery circuit, the Seeed Studio XIAO ESP32C3), running on a 3.7V LiPo battery. The board is mostly in deep sleep, so it can be battery powered for quite ...
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1
vote
0
answers
177
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I designed a boost converter based off of a Texas Instruments schematic. Can't figure out why they're shorting out after a while
I designed my first DC to DC boost converter, which was primarily based off of the schematics that Texas Instruments provides for it in the datasheet, and then fine-tuned (applying specific component ...
- 313
0
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1
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79
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Boost converter output consuming battery - will a blocking diode be of use? [closed]
I'm using a CC/CV boost converter to charge a lithium-ion battery via a USB-C PD circuit.
The issue I am having is the boost converter is consuming power from the battery connected to the output when ...
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2
answers
152
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Does the oscillation frequency of my step-up (boost converter DC-DC) depend on the characteristics of my motor?
I have to step up a 4V supply (the generator is a button battery) to a 12V voltage to supply my motor.
How do I size the components of my step-up converter? To compute for example the inductance and ...
- 3
1
vote
1
answer
387
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Converting 0-3.3 V to 0-12 V
My Teensy 3.6 microcontroller outputs an analog 0 V - 3.3 V signal.
I plan to use my Teensy's PWM pin to control the speed of a fan that has 12 V as its 100%.
I wish to convert the 0 - 3.3V --> 0 - ...
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0
answers
67
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How can I increase the output parameter of a boost converter based on tthe MC34063?
I would like to get 16.5V and 160mA output using an MC34063 IC. The circuit is designed on Multisim shown as a picture below. It provides the desired output.
In practice, this circuit has set as ...
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1
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79
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What does the output current depend on in the booster circuit?
What methods are there to increase the output current of the booster circuit?
I got the figure below from a TI LMR62014 step-up voltage regulator datasheet.
Assume Vin = 4 V and Vout = 8 V
In this ...
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1
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91
views
Formula for current vs duty cycle in step-up pwm circuit?
What is the formula for average current with step-up PWM circuit (and about 30 kHz frequency and 300 uH inductor) that charges battery at 72 volts, and source is 24 volts, relative to duty cycle? I ...
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3
votes
3
answers
478
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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 ...
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1
answer
97
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How to visualise high voltage and no current at secondary side of step up transformer?
As per the literature I have gone through about voltage, current, impedance, magnetic flux, etc what I understand is that, at the secondary side of a step up transformer, the voltage is very high and ...
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1
answer
114
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What and how does a step up transformer work that converts a 120V outlet to a 240V outlet?
I've been fixing electronic equipment for some time and I've never dived into what a transformer really is.
In my shop I have a 240V reflow machine that I run for at most 5-10 minutes at a time off of ...
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1
vote
1
answer
80
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LMR64010 using externaly adjustable feedback voltage
I am using a basic application circuit for LMR64010. The output voltage is adjustable by changing resistor R2 (R1 is a fixed value of 13.3 kΩ).
I would like to know how to modify this basic circuit to ...
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0
votes
3
answers
249
views
Can very high voltage and very low current AC produce strong magnetic flux in the coil?
I have done some research and also conducted some experiments and found that the magnetic flux in a transformer or a coil mainly depends on the number of turns and current flowing in it and not the ...
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0
votes
2
answers
100
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Step-up converter from 3.7 V to 12 V unable to supply the load
I'm working on a project where I want to supply a magnetic valve powered by two parallel connected Li-ion batteries. Each battery has a voltage of 3.7 V (max. 4.2 V) with a capacity of 3.5 A (in total ...
0
votes
1
answer
36
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Where does the Step-Down Convertor used as compare to RECOM DC/DC converter?
I am reading Step-Down converter and given the circuit below, which is a step down converter. It consists of a MOSFET, inductor, diode, capacitor
And if I compare it with RECOM component DC/DC ...
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1
answer
72
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9 V to 12 V step-up converter to drive load between 10-100 mA, and no load
I'm working on stepping up the voltage from a 9 V, 150 mA power supply to 12 V, with a load of 10-100 mA and moments where there's no load.
I have implemented something similar with this IC ...
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1
vote
3
answers
285
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How do we use step-up transformers to get a very high voltage compared to the initial voltage?
In some medical equipment like CT we find that the voltage entering the equipment is around 380 V, but then it's increased to be around 70 kV to 140 kV.
To increase voltage we use more turns on the ...
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votes
2
answers
242
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Will I feel a shock using this circuit?
I'm a programmer and new to electronics.
I am trying to achieve at least slightly shocking my finger using this circuit and want to make sure it works before buying the stuff. It will be a punishment ...
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 ...
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2
votes
4
answers
739
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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 ...
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0
votes
3
answers
149
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Simple transformer construction help
I’m trying to construct a small transformer to step up the audio of a crystal radio to line level. I can actually hear the radio faintly using a conventional earbud (not piezoelectric), but I’d like ...
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1
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1
answer
226
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What's the simplest way to produce 150VDC for activating my piezo stack?
I recently bought a piezo stack for research purposes. To activate the piezo stack and get the maximum stroke I have to supply 150VDC.
I want to use the piezo stack in two states only: 0V and 150VDC.
...
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0
votes
1
answer
252
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Step up converter with MC34063
I have a 24v humidifier that I would like to power using a 12v power supply, so in order to do that, I designed a voltage step up regulator based on the MC34063. But since the humidifier requires a ...
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 ...
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1
vote
4
answers
401
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Power transformer circuit using H-bridge doesn't work as expected
I am trying to step up my AA battery's voltage (which is 8 volts in total) using an ignition coil (which is rated for 12 volts input.)
To drive the coil I am using an H-bridge at a frequency of 50 kHz ...
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0
votes
0
answers
176
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Should I use one thick wire or many thin wires in a step-up high frequency transformer to reduce resistance and impedance?
I am planning to make a step up high frequency (hundreds of kHz) transformer. I want to reduce the resistance and impedance in the secondary. Should I use one thick wire in the secondary, or should I ...
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1
vote
1
answer
85
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How to best power small loads from 1.5V batteries in a kit? [closed]
I'm trying to build an electronics kit (so THT parts only if possible) that I would like to power from a single AA battery. The circuitry on the kit uses 3.3V 74HC series CMOS parts and should ...
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