Power supply Definition and 302 Threads

Hello, I'm 15 and very interested in physics. I'm building a safe nuclear fusion reactor as a science project. (I know how to safely handle high voltage and radiation) I have a question about the power supply. First off, I know that fusion takes around 40 Kilo-volts and it needs to have a...

Hello Guys My baby is a Suzuki GN125H (Bought in year 2013). I have been pondering for a while to have some kind of dash cam installed on her. Thus I thought to have a power supply installed so as to get power for the dash cam (only to be used when the motorcycle is ON and running). My...

How do i get 250v dc power supply?? Should I use lots of batteries or is there an easier way?

Hi, I am trying to charge some maxwell ultracapacitors (2600F @ 2.5V) with a 1000 watt PC power supply. however when fully discharged, the supply thinks the cap is a dead short and the safety mechanism kicks in and no charge happens. Is there a simple circuit I can use to prevent this...

I have a small refrigerator in my projector room. Many times when the compressor in the refrigerator turns off it sends a voltage spike through my home circuitry and distorts the projection image. Example: When I'm watching a movie on the projector everything is working correctly. Then the...

Explain the effects of AC power supply parameters-voltage and frequency?

When I connect a DC power supply to a board, why do I get a spark. I connect the ground terminal first and then the Vcc terminal(24V). When I connect Vcc with an alligator clip, I get a spark. Is it because of charging of the bulk storage capacitor?

Assuming a 2 pin connector for an SMPS power supply, what is the role of the R and C that are connected to Case ground. Usually R is in Megaohms and C around 0.1uF,2KV. IS there a risk of shock when the case is touched?

I am going to make a power supply. I understand the smoothing capacitor and the full-wave bridge rectifier. I am trying to make a 60V, maybe 10A power supply - maybe only 5A, but I would prefer 10A. I don't have a transformer for it, though. I have researched a fair bit on transformers...

Homework Statement If I have 3 2V and 1A supplies, and I want to test at 5V, how will I setup? Homework Equations The currents add up when connecting the supplies in parallel, and the voltages add u when connecting in series. The Attempt at a Solution I tried different...

I'm using a DC power supply connected to a TPIC 1021 chip(basically a serial transceiver). I need 12V to power the chip and my DC power supply is equipped with 2 knobs,one changes the voltage and the other changes the current. For some reason,when I get to 5V and turn the volt knob...

What is the work of the earthed line with zero potential between two power sources in the op-amp. What is the normal function of Earth wire except for preventing shock?

Hi, At present, I am learning about Switched-mode power supply and Low drop out regulator using CMOS. Could anyone suggest some good books about this? The main problem here is "using CMOS". Thanks.

All of the ones I've seen online can only do about 30 amps tops... then there are welding machines, which I am not sure if those can used for non-welding applications without modification of the machine. I am not looking for something that is variable, just something that can output a high...

Recently, I made an electromagnet by winding copper wire (length: 4m) around a metal screw. The power supply was from a mobile phone charger (5V). Here's the issue: When I connected the electromagnet in series with a 10 ohms resistor, it worked fine (attracted nearby metal objects), but...

Hi, I have two questions about power supplies. I am just curious of what is practical and possible. i) I have been using a 30V wall wart regulated to 18V for a radio telescope project (using LM317). The load does not really need a set 18V, and could actually swing between 13V and 18V. The...

Hello, I have a little wireless camera that I want to power on a battery. The camera requires 12V ~1 amp DC to run. I am a DIY kind of person and have a few lead acid batteries from work, all of them are 12V DC, but they range from 4.5 amp to 12 amp. I've worked with AC power in the past...

What sort of company would I contact to have something like this made? I am looking to have made a Variable DC power supply capable of outputting up to 300-400 amps and up to 30v(and as little as well below 1 into the decimal region). Preferably as small as possible. My only requirements for...

I am trying to create a backup dc power supply that is charged by a battery which ranges between 10 and 21Vdc. The backup supply needs to output 20W (10V, 2A) of power for 5 seconds when the battery is disconnected. I have performed some research into how long the capacitor in the backup supply...

hello guys ... i want to design this circuit on proteus and print it to put it on a board this is a regulated power supply circuit the problem is that iam a beginner in proteus ...so can anyone help me how to start ? The Circuit : please help me guys with this ..Thanks :)

So I had an old home receiver which broke down so i took out the large transformer 6800uf caps and rectifier. This receiver put out 60 watts out of each chip so from my many hours of being on google in the past, the chips should require +-35v, and because of the increase in voltage after...

Hello people! I've been absent from this forum for quite a while. But now I return with questions regarding a little project I have to do. So basically I have to make a AC and DC power supply. I need 24 V AC output and 0-30 V DC power supply. I have a transformer(I think its 220V/24V)...

I am trying to get ahead & learn electronics. I'm just working on my general education classes now. I'm in need of a power supply. I want this to last me through my schooling & beyond. This may sound like a dumb question but are PSU's only DC out? Anyone know one that'd suit me? I'm not sure...

Making an amp for a friend, useing a split supply with center tabbed transformer as ground for the chip, I think I heard the current alternates comeing from = and negative into ground, or from = and ground into negative or somthing, so where do I put the fuse?

I have a couple of linear motors + their drivers and I'm trying to make an X-Y stage for a prototype milling machine, but I'm still a student and in a mecheng stream and haven't sized a power supply before, so not sure how to do it. So far this is my thought process: Motor specs: 340VDC (max...

Ok this may be a stupid question but what the heck. If I have a power supply giving max of 4amps with 35v and what I am powering draws 6 amps at 35v, then that means the device has 5.7 ohms of resistance. If I put a 3.05 ohm resistor (ish) then this will drop the amps down to 4, but will...

So I have been using some small audio amplifier ics in the tda series because they are good and easy to use but I have never had to power one with more than 24v. I am wanting to look into using a chip that requires about 35-40v supply but I can't find a transformer that is past 24v and am not...

Hi everyone, I am having some trouble and I really hope someone here can point me in the right direction. I have been following this wikihow: http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-Supply. In general, my power supply seems similar, although the coloring...

Hello, I am wanting to build an uninterrupted power supply for a certain device that has multiple electronic devices working together. It will need to run about 1.5k Watts for about 15-30 minutes without an external power source. There will be a few moving parts such as wheels to move...

Last month I bought a computer online that's delivered already built, and just recently the power supply has begun making a quick ticking sound. I'm unsure if it's the fan or something else, but the ticking sound doesn't start until I'm at my desktop. During boot it's quiet. Anyway, it's just...

As stated: every now and then you see maximum power output to a motor, a turbine, but why is there a limit to the power output to these electrical/mechanical devices? isn't Power just equals to F*v for mechanical devices and VI for electrical devices? what are these "ratings" and...

Hello, Is it possible to run heating and elements and other devices with DC supply? I have turned on Nickel-Chromium Heating wires with AC but is it okay to use it with DC supply? What's the main practical difference between AC & DC, as long as the voltage and current of supply is...

Hey guys, Are you guys aware of any designs (other than buckboost or charge pump) for negative power supplies using just a positive voltage (and ground of course) as inputs? Creative designs are totally welcome. Thanks in advance!

Hi all, I need to create an adjustable power supply (AC) that ranges from 0-6 volts with roughly 1 ampere at 1 volt. I have a variac transformer (0-130 volts), an isolation transformer and a stepdown transformer. My question is, does it matter what order I step the voltage down? In other words...

Hello all! If you're reading this thread then thank you for taking the time to read and/or reply! I appreciate it!:biggrin::biggrin::biggrin: Onto the guts of the thread. Here I will list what I am trying to do, the associated questions that I have found reasonable to ask, and then any...

Hey! I am trying to figure out the best way to run a AC gear motor off a DC power supply. Any help would be greatly appreciated.

It says DC in 12volts but I'm not sure how many amps this thing can handle... I don't want to plasma myself so I was looking for helpful answers, thanks guys pic of globe (paid $8 not bad) http://postimg.org/image/462gwlj5v/

What is a difference between sine Signal Generator and AC power supply?

If a 60 Hz equipment needs to be run off a 50 Hz power supply (3 phase, AC) what are typical options? One brute force approach is to simply change motors. But I was wondering if a VFD / thyristor or some such might work? This is medium sized equipment with rating of ~5 kW. As an...

Please recommend a high quality power supply (at least 1KW) for this new gaming build. I haven't finished it yet, but it should be complete within the next few months.. *Core i7 3770K *Corsair Dominator Platinum 8GB DDR3 1600MHz cl9 RAM *MSI Big Bang Mpower Z77 motherboard *Two-way SLI GTX 680...

What things do I need to consider when selecting a proper sized power supply? Basically this is control power, ouputs are pushbutton lights, alarm horn, and solenoid valves. Do I look at the peak inrush current? Average holding current?

Hello. Excuse my poor Englishe. My power suply stop working, and now i use from neiborgh old suply, but this is too low for all component on my computer. So will you tell me haw strong pover suply i need to use? My computer is old, and use ATX suply. I have, matherboard, 3Gb rams, cameras...

If I'm using dual SLI GTX 680's, is this PSU a good choice/ 1000W with an 80 Plus Gold certification sounds pretty good to me.. http://www.newegg.com/Product/Product.aspx?Item=N82E16817152044

I need help designing a power supply for a portable medical research device for animals. My problem is designing a configuration for multiple voltages with pcb size and power efficiency in mind. I need 3.3 V, +/- 1.5 V, and +/- 20 V. Below I’ve listed device info and estimated current...

Good day people. I am new here and discovered the forum while trying to answer this question. I have a large variety of brushless and stepper motors collected all for the purpose of putting together my CNC mill. The router will be 80 amp 5500KV Kevlar bandaged brushless motor capable of 100,000...

Greetings. I'm working on an experiment that needs a power supply/ frequency generator with some unique capabilities. I need to be able to vary the waveform (preferably with a computer) and vary the output voltage simultaneously. Frequencies vary from 1hz to 100khz and voltages range from 120v...

I have a LifeFitness exercise bike. It uses a Hawker Energy Sealed Lead Rechargeable Battery that is three cells with a rating of 6 volts at 2.5 AmpHours for 1019 Watts. The battery is recharged by usage of the bike. However, the bike is designed for commercial use and the battery discharges...

Hi I've come across a problem at work and was hoping someone could help me to understand what is going on exactly. power supply: 6kW, 9.2A, 5890V, and running at approx 50kHz. this power is routed through ∅3mm Kanthal AF bar, threaded at one end, and what we see is resistive heating...

Hi all, I am making electron gun. I have several High voltage power supply to provide enough voltages to Filament, Anode, Grid, Focus and deflection plates. I want to make electron gun of acclerationg potential of 5-8 KeV. I know I have to give negative supply to cathode or filament. and then...

I decided to use 1 power supply to run my computer and one to run my fans is the a bad idea? 2 fans in the front 2 fans in the back and 1 fan on the side and 1 fan under my graphics card.