Hi. Needing help badly please....

Thread Starter

BLMagic

Joined Aug 17, 2020
26
Hi,
One is a total noob with electronics :-(. Building a project, using a DIY coil i made, Its to project a magnetic source few inches or feet off a built stand, 2 mm thickness at electro magnetic point. Using 2 x9v batteries in parallel, the source moves slightly, then bought a 10v - 60v dc to dc step up converter. Ok the magnetic source move little more but just not powerful enough. Looking for a circuit that could be suitable, its only used as a quick on off, not continuous. Acquired this, but no idea, if any one be so kind and could figure out please, know its using a 4 way receiver...
Again thanks if any help..
367414446_1225482795519815_3843177674863113249_n.jpg Regards
 

Irving

Joined Jan 30, 2016
4,077
Welcome to AAC. Oh where to start. An interesting building technique . what is all that 'glue'?

Do you have a circuit diagram or a schematic? And some details of your DIY coil. Without more info its hard to advise. What's the end goal - some sort of 'magic trick'?
 

schmitt trigger

Joined Jul 12, 2010
961
You mention two 9V batteries, but the picture shows a quad AA cell holder.
Which one is it?
Either way, the current rating of either one will be minuscule compared to what electromagnets require.
 

MrChips

Joined Oct 2, 2009
31,106
Please use a more specific thread title that better describes the nature of the thread.
"Hi, Needing help badly please...." is of no help to anyone.
 

Thread Starter

BLMagic

Joined Aug 17, 2020
26
You mention two 9V batteries, but the picture shows a quad AA cell holder.
Which one is it?
Either way, the current rating of either one will be minuscule compared to what electromagnets require.
Hi, thanks for reply, No thats just an image some one passed on. I have seen this working absolute flies..
 

Ya’akov

Joined Jan 27, 2019
9,267
Welcome to AAC.

You can't cheat physics. The limiting factor here is power which is V(olts) x A(mps) and that is limited by your power supply.

To increase the strength of your magnet you can:

  1. reduce its resistance
  2. increase the number of turns in the coil
  3. (possibly) improve it's geometry
  4. increase the power you are providing

Increasing the voltage will, to the limit represented by P (in Watts), increase the field strength by increasing the current. This relationship is described by Ohm's Law where current in amps (A) is directly proportional to voltage in volts (V) (and inversely proportional to resistance in ohms (Ω)).

But your 9V battery source is a very poor one with extremely limited current capacity. You need to use something different, such as a LiPo pouch cell. One thing you can do is integrate your power over time. If you charge a capacitor you can trade that charging time for increased power (voltage applied and total available charge).

A circuit that charged a cap then discharged the cap as needed could be powered by even a very low power source. The less power the primary source has, the longer you will have to wait. But, without knowing what sort of magnetic field you need, the resistance of the coil, the number of windings and their dimensions and arrangement, and the actual circuit in use and improvements will be speculative.

The information you need is there: more power into the coil and most efficient coil design in some combination is what you need. How to do that needs a better description of your project.
 

Thread Starter

BLMagic

Joined Aug 17, 2020
26
Welcome to AAC.

You can't cheat physics. The limiting factor here is power which is V(olts) x A(mps) and that is limited by your power supply.

To increase the strength of your magnet you can:

  1. reduce its resistance
  2. increase the number of turns in the coil
  3. (possibly) improve it's geometry
  4. increase the power you are providing

Increasing the voltage will, to the limit represented by P (in Watts), increase the field strength by increasing the current. This relationship is described by Ohm's Law where current in amps (A) is directly proportional to voltage in volts (V) (and inversely proportional to resistance in ohms (Ω)).

But your 9V battery source is a very poor one with extremely limited current capacity. You need to use something different, such as a LiPo pouch cell. One thing you can do is integrate your power over time. If you charge a capacitor you can trade that charging time for increased power (voltage applied and total available charge).

A circuit that charged a cap then discharged the cap as needed could be powered by even a very low power source. The less power the primary source has, the longer you will have to wait. But, without knowing what sort of magnetic field you need, the resistance of the coil, the number of windings and their dimensions and arrangement, and the actual circuit in use and improvements will be speculative.

The information you need is there: more power into the coil and most efficient coil design in some combination is what you need. How to do that needs a better description of your project.
Thank you for the reply, appreciated... As have 2 9v in parallel, hooked up to a step up regulator, (max 60v) Still not enough power going through the Coil for it to shift the work piece, Small box say size of a match box, with small shim magnet. Coil approx. 200 windings with 20swg. cant be gradual build, but instant just like a blink of an eye. Thanks
 

Thread Starter

BLMagic

Joined Aug 17, 2020
26
Does the coil have a ferromagnetic core? Without that it will be very weak.
Hi, due to thickness needed, it does not.. Thanks, or would looking at a shop bought electro. The image is a photo taking from another build someone bought... Looks like using capacitors. gives a good punch.. Thanks367414446_1225482795519815_3843177674863113249_n.jpg
 

MisterBill2

Joined Jan 23, 2018
19,473
"Projecting a magnetic source"???? I don't think so!!
Projecting a magnetic field? Certainly that happens all the time.
Using a coil that you have fabricated? That would be useful to know more about!
AND an absolute truth from "Y": "You can't cheat physics" Absolutely correct.

So my GUESS is that the unstated goal is to create a magnetic field without being obvious about it, to produce some sort of effect that others will not understand how it is achieved.
To do that requires POWER, exactly as "Y" has already stated. The shape of that magnetic field will be defined by the shape of the coil producing it AND the location of the ferrous materials used to focus the lines of magnetic flux.

There is also a great deal known about directing magnetic fields in information about induction heating systems, and that information should be helpful.

The good news is that there is already a great deal known about every aspect of directing magnetic fields and focusing magnetic flux,
and probably not much accurate information shown on the cartoon channel.
 

Thread Starter

BLMagic

Joined Aug 17, 2020
26
"Projecting a magnetic source"???? I don't think so!!
Projecting a magnetic field? Certainly that happens all the time.
Using a coil that you have fabricated? That would be useful to know more about!
AND an absolute truth from "Y": "You can't cheat physics" Absolutely correct.

So my GUESS is that the unstated goal is to create a magnetic field without being obvious about it, to produce some sort of effect that others will not understand how it is achieved.
To do that requires POWER, exactly as "Y" has already stated. The shape of that magnetic field will be defined by the shape of the coil producing it AND the location of the ferrous materials used to focus the lines of magnetic flux.

There is also a great deal known about directing magnetic fields in information about induction heating systems, and that information should be helpful.

The good news is that there is already a great deal known about every aspect of directing magnetic fields and focusing magnetic flux,
and probably not much accurate information shown on the cartoon channel.
Hi thanks for reply. Correct, needing a instant strong magnetic field :- )It doesn't really matter on filed direction, as can be positioned to give max effect. This is sitting inside a Base, 2 mm below surface, a magnetic object placed at right position, when activated, it throws the magnetic object off (object size and weight of say a matchbox :)
 

Irving

Joined Jan 30, 2016
4,077
As I said in post #2, it a 'magic trick'. Though this isn't the 1820's, I doubt many would think its magic!

A schematic would be useful to understand how you're driving the coil.
 

Thread Starter

BLMagic

Joined Aug 17, 2020
26
As I said in post #2, it a 'magic trick'. Though this isn't the 1820's, I doubt many would think its magic!

A schematic would be useful to understand how you're driving the coil.
Thanks again. Unfortunately i dont have the schematic, just the image :-( It is part of a magic effect yes...The coil driven by, its the help would like please :) just a short burst of power. Thanks
 

Irving

Joined Jan 30, 2016
4,077
Thanks again. Unfortunately i dont have the schematic, just the image :-( It is part of a magic effect yes...The coil driven by, its the help would like please :) just a short burst of power. Thanks
Without a schematic, a circuit diagram, how did you copy that image? Or is your's a different approach? How are your battery, coil, etc connected together, can you draw that?
 

Thread Starter

BLMagic

Joined Aug 17, 2020
26
Hi thanks again. A friend had an effect, just taken photo of it, Hmm Regarding sketch Irving, nothing really other than thigiag.jpgs crude drawing... Thanks
 

Irving

Joined Jan 30, 2016
4,077
What size are the 9v batteries? What MOSFET? What dimensions of coil, mean diameter, # turns, length? What is the object you're trying to make fly? Is it a magnet? Dimensions & weight?
 

Thread Starter

BLMagic

Joined Aug 17, 2020
26
What size are the 9v batteries? What MOSFET? What dimensions of coil, mean diameter, # turns, length? What is the object you're trying to make fly? Is it a magnet? Dimensions & weight?
Again appreciated the reply :). Its a XY Mos driver. Weight be 1.4 - 2 grammes. Wire is 20 swg, approx. 200 turns give or take. Also have thinner wire. just standard 6LR61 9v batteries, but looking at lithium rechargeable..
Thanks again...

20240528_160223.jpg
 

panic mode

Joined Oct 10, 2011
2,892
so you have a coil, without iron core. it will be able to produce magnetic field but question is what do you want to do with that field and for how long. the more current, the stronger the field. but without ferrous core, this is not going to be strong. and 9V batteries are not a great source. they can supply some 100mA short term but that is pushing it. you may use it to make a Thomson coil ring experiment if the ring is really light and good conductivity. you can add some capacitors in parallel with the battery to act as temporary storage. but if you want to have a levitate cast iron frying pan that makes an omelet, you will need to use way more power and and much more refined coil/driver arrangement.
 
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