Four weeks ago I was searching for an magnetizer that can revive my dead magnets (I killed them heating up at a high temperature, trying to encapsulate in a piece of glass), but I haven't found a instructable project that can help me, so with physics teacher's support I made one that works.
With it's help you can revive dead or old magnets, or you can magnetize things like screwdrivers, nails, paperclips, or any metal which can be a good magnet.
It looks like a game console, isn't it ?
This device is only a PROTOTYPE, so maybe I will try to make a big one that can magnetize your hammer.
Now let's start the work.
With it's help you can revive dead or old magnets, or you can magnetize things like screwdrivers, nails, paperclips, or any metal which can be a good magnet.
It looks like a game console, isn't it ?
This device is only a PROTOTYPE, so maybe I will try to make a big one that can magnetize your hammer.
Now let's start the work.
Remove these ads by
Signing UpStep 1: Materials
The materials you need for this project are:
- a 1N4007 diode
- a DPST switch (I get mine from an old computer)
- a Push button switch (or how it is called)
- a jack and a capacitor(230 uF and 400 V) from an old power supply unit
- a plastic, wood, Plexiglas, or any material you found, but NO metals like iron, steel, aluminum, copper or any metal that are atracted
by magnets.
- a 15 W, 220 V lamp
- copper wire for making a coil (0.6 mm diameter for 800 turns)
- something on you can spool your coil (I use a plastic support from solder with inner diameter 20 mm [don't use something that have the inner diameter bigger than 20 mm because then your magnetizer will not work])
- a cable for your jack (I use an ordinary cable for PC supply), why I use it ? because it can be removed.
-two plastic panels (I made them because my case needs panels )
- 20 cm of thick copper wire (2-3 mm diameter)
Tips:
Watch out how you handle the capacitor. If it is charged, and you touch it, you can die.
Try to make the capacitor's links with push button switch and with coil as short as you can,
- a 1N4007 diode
- a DPST switch (I get mine from an old computer)
- a Push button switch (or how it is called)
- a jack and a capacitor(230 uF and 400 V) from an old power supply unit
- a plastic, wood, Plexiglas, or any material you found, but NO metals like iron, steel, aluminum, copper or any metal that are atracted
by magnets.
- a 15 W, 220 V lamp
- copper wire for making a coil (0.6 mm diameter for 800 turns)
- something on you can spool your coil (I use a plastic support from solder with inner diameter 20 mm [don't use something that have the inner diameter bigger than 20 mm because then your magnetizer will not work])
- a cable for your jack (I use an ordinary cable for PC supply), why I use it ? because it can be removed.
-two plastic panels (I made them because my case needs panels )
- 20 cm of thick copper wire (2-3 mm diameter)
Tips:
Watch out how you handle the capacitor. If it is charged, and you touch it, you can die.
Try to make the capacitor's links with push button switch and with coil as short as you can,
Visit Our Store »
Go Pro Today »
Yet no one has mentioned just how dangerous my suggestion above would be!
1. The capacitor, on average, is capable of holding 3kVDC maybe even as high as 5kVDC. It would have to remain properly housed in the modified microwave oven just in case it exploded.
2. The button to dump the capacitor into the magnetizing coil would have to be a very heavy industrial switch----if a 'domestic' switch did not start arcing almost immediately, the contacts would probably weld together into a short circuit on its very first use.
If you must "criticise", then please use the "be nice" policy. Why would andreyeurope want to post a third project if it was only going to attract the same negative responses?
I have to be firm about this for everyone's safety, including yours.
Any home-built mains powered circuit should be checked by an electrician or properly qualified person for safety BEFORE it is connected to the mains supply.
On 250 Volt AC mains, the capacitor will charge to 350 Volts.
A capacitor must never be charged above its rated voltage. It is liable to explode.
But you are correct about the requirement for a high current switch.
General safely like make sure the wires you use are rated for the voltage, is just standard practice. this protect (in my country) would run on 230V and CB's and fuses would be rated at 16amps, you would be dead many times over and they wouldn't even notice. At the end of the day most people on this site aren't electricians, we need to make sure these people are safe. RCD's is what you need.
Only thing might be need to watch is the diode as it's rated at 1A max, but should be okay, a fuse would be a good idea though.
220-240v peek Sinusoidal Alternating Current Halfwave Rectified = 310-330 volts DC.
Yes, the capacitor should eventually reach a peak charge in the 300VDC range. No, your language is inappropriate.
Im sorry.
Some comments are dangerous, I felt I to make an impact on that kind of croc. A lot of people dont realize small mistakes like that will put you on the Darwin awards. Not that most people still wont touch 110v.
Thanks for your comment
very nice project though.;
You have access to a video camera, may I suggest another vid clip? Grab the frame that shows the pulse.
Nice project btw. You have done the proof of concept, how about looking at any criticisms and see if there's anything you could work into v2.0?
I will think of making a new video. By the way, the photos were taken with a smartphone camera.
Thank you.
Another covering idea for the magnet would be to smother it in bathroom sealant silicone - probably even more inert than hot glue?
You could make a mould out of a biro tube or similar, pump it full of silicone, insert magnet, top up with more silicone and when set gently break out of the tube and trim.
" ...photos were taken with a smartphone camera."
Ah but if your video was taken using your smartphone too, then it's even easier to grab an image that captures that pulse spot-on. Just an idea if you need to capture a transient event. : )
No fuse on a mains project, things stuck with glue instead of being fixed properly, items being thrown out, I could go on and on.
Please amment this project before someone get hurt or worse.
I admire you for having a go but this project wants building properly.
I couldn't POSSIBLY count the number projects that involve electricity and HOT GLUE; It holds fast when it returns to a Solid AND it does not conduct.
"fixed properly, items being thrown out"
...the only thing I see being thrown out is your poor use of English; the word is "Amend" not "Amment'(please change the spelling of your criticism..." before someone get hurt or worse".
The Author had a need and came to this site for help. He/She was forced to look elsewhere and sought out a teacher who was able to assist. The Author then took that teaching and put it to use to complete the answer to the question asked. FIRST we get the Basic idea made into a working thing...THEN we see what can be done to make it Better. I don't see any Instructables under your Nick...lets see YOU do better.
The Instructable is simple, fairly safe(if ANYTHING is going to blow...it'll be the inline lamp!) and serves its task very well. I give the project 8/10!
Can we please start encouraging the author rather than deriding him?
Thanks,
Tom
You can keep the device connected to mains indefinitely: the capacitor will stay charged until you push the discharge button.
Ferromagnetic materials are in fact ATTRACTED to the center of the coil: they vibrate and stuck in the center. Only magnets can be thrown outside or inside, regarding the alignment of the magnet poles.
The problem isn't always shorts, insulation breakdown and leakage to ground (through people) is really the concern.