Troubleshooting

[kmh]

Hello, I’m for the most part new to a lot of this, though I have been toying with the subject of magnetic generators on an off for a bit. I was watching a few videos on YouTube and was introduced to the Bedini Motor, particularly the Bedini/Davro setup. As one can imagine I was quite intrigued by the idea and also completely baffled as I know next to nothing of electronics and a wiring schematic resembles what I would imagine a highly encrypted alien message to look like. I did a lot of research on the circuit and also started learning how to read schematics which helps a lot, and went on to buying the materials needed.

Today I began to wrap my coil. The possible problem that I am having though is when I hook just the coil up to a 9v it is not really creating a magnetic field (also tried on a 12v). Now, because I am interested in the Davro setup I will be using a neodymium sphere which in turn would magnetize whatever I use for a core (from my limited understanding), so I am using a aircore. I understand that an aircore will more than likely dramatically reduce the coils strength but, I wouldn’t imagine it doing it to such an extent.

I am using 18 gauge enamel coated magnet wire for both the power and trigger as I really didn’t have the money to buy an entire other spool to make the trigger much smaller. Could this be my problem? I really do not understand how different gauges will affect everything as I couldn’t seem to find any information on the subject other than vague references. While it was hooked up I placed a n52 neodymium disk 1/2in diameter and 1/8in thick with roughly the pull force of 7 to 8lbs next to the coil and it wouldn’t attract that well except for at one end of the coil but, even that was a bit weak. I read somewhere if using the same gauge for both the power and trigger to use 250g per wire which is around 1/2lb. The 18 gauge wire is roughly 200ft per pound so I used 2 wires of 100ft each (not sure of the coil count)

I am going to rewrap the coil as I must have done something wrong but, have a few questions before I do. Is it best to run them in parallel or twist them together? I have read both but, never heard of one method preferred over the other. And since I have the 18 gauge wire, is 9v enough to create the effect needed? And finally since this is my first bifilar coil does it really matter the gauge of the wire used for the trigger as I have found some wire I bought from RadioShack ages ago which contains 200 feet of 30 gauge wire which is the only spool long enough to match the 18 gauge in length.

Sorry for the lengthy post and thank you in advance for any advise you may be able to offer on the matter.

[sucahyo]

What is the impedance of your coil?

I read that people usually need 500mA at 12 V. This may translate to coil impedance between 12 to 1 ohm.

[kmh]

Not sure what you are asking honestly. Are you suggesting I should try a larger power source?


I went ahead and put it all together trying the 30 gauge as the trigger and got no results at all. I am attaching pictures of my thrown together setup to see if anyone might be able to point out what is wrong here.

Transistor is 3055, Diode is 4001, and Resistor is 100ohm
Power wire is 18 gauge and Trigger is 30 gauge.

[kmh]

Thank you for the reply, question for you though, why 2 coils? Also every schematic I have seen it calls for a 4001 diode from the emitter to the base but, I notice it is missing from yours, why is that? Sorry still new at this as I stated before so I’m full of questions still.

Also I was going for just a very basic setup, not trying to charge a battery at the moment, just get it running. I do notice something different though from my setup in regards to the potentiometer. The original diagram I was going from showed the trigger wire going to the left and not the middle connection, could this be my issue?

[jonnydavro]

@Kmh.HiThanks for taking an interest in my Bedini experiments and once you get get your first working motor,there will be no stopping you .
Ok, a few things to try.First put an amp meter in series with the positive of your battery.This is needed in the debug stage to see if the transistor is triggering.
In the pics you posted,your variable resistor looks wired wrong as you are using the outside connections.The centre connection is the wiper arm so needs to be used with one outer connection.You have it wired across the full resistance.
Your coil should work as Lidmotor has shown that you don't need much wire to make a bedini,he used a sewing bobbin and i have just replicated this this week and found that it was hard to start with a sphere but easy with the cylinder with the steel ball bearing pivot so what i am saying is you may not be spinning the sphere fast enough,close enough for long enough.
I would spin the sphere on top of the coil and use aircore for now and you can experiment with cores later.
Try my suggestions and see if you can get a reading on the ampmeter when you spin the magnet and you could also replace the pot with a large one over 10k and see if the circuit goes into self oscillation.You may need to spin the magnet in front of the coil to start it.Let us know how you go.Jonny.
p.s Plenty of good info here http://www.energeticforum.com/renewa...ead.php?t=4026

[kmh]

Thank you very much for the advice. I will move the trigger wire over to the center connection on the pot and check the amp readings tomorrow and post my results. Thanks again for the help.

[kmh]

I fixed the connection today on the pot and still no luck. So I began to run the inline amp test as you suggested and I wasn’t getting anything at all. So a buddy of mine from work started checking the ohms and realized there is a connection between my power and trigger wires somewhere. I must have scratched the enamel or broke it somehow when spooling the coil. So when I get an opportunity I will make a new coil and test it, hopefully I didn’t damage the transistor.

Anyone have any suggestions on what to do with 100ft copper wire with enamel break somewhere? I really hate to toss it as it is a bit costly.

[citfta]

nicked wire

If you nicked a wire you would have had to nick both wires at the same place for there to be a connection from the trigger wire to the power wire. Did your buddy check the wiring with the coil still connected to the circuit? If he did then he is reading back through the circuit and not the wiring in the coil. If you do find a nick in the enamel of one of the wires you can always just put a coat of finger nail polish on the nick and let it dry then rewind the coil.

I just reread your post and realized you said you didn't show any current when you did the inline amp test. This indicates you do NOT have a short in the coils. Looking at your pictures it is not clear if you have the enamel completely cleaned off the ends of the trigger wires. The power wires look pretty good. You have got to get all the enamel off the wires before you solder them. Otherwise you will have a bad connection inside the solder joint. Your soldering actually looks very good. If you are sure you have good connections every where then the next thing to do would be to swap the ends of the trigger winding and see if it takes off then.

Good luck, Carroll

[kmh]

Yes I disconnected the coil completely from the circuit when he tested it just because of that fact. The only thing I can think of is I must have hit the edge of the spool when I was winding and took some of the enamel off. If you look in the pictures you can see I cut it so it would lay more evenly, I should have sanded the edges smooth. Lesson learned.

I to found it odd that there was no reading at all myself but, as stated in the beginning of this post I am fairly new to electronic circuits and etc so I was going off my buddies advice who sometimes has to fix wiring in cars (I work in a automotive shop). I double checked all the connections and the enamel is cleaned completely off about a half an inch back.

And thanks for the comment on the soldering I learned how to do it about 5 minutes prior to putting this together on YouTube lol.

Thanks

[kmh]

Alright, so I rebuilt the coil. I used a 26 gauge trigger wire this time and also made the coil bigger by adding more turns (same spool though). For just in case I went a head and bought another transistor and build a new circuit using my extra 4001 diode and 100ohm resistor. I made sure everything was soldered together correctly and I’m still getting nothing.

I placed the meter in between the positive on the battery and the power wire for the coil for the inline amp test and still have a reading of 0. I also tried swapping the trigger wires as suggested to no prevail. I checked the ohms and everything seems to be open and flowing properly and also checked the diode and it is working properly. I even tried hooking it up to a brand new battery for a diesel truck. I’m at a loss here. I have had a few people look at it and from their understanding it seems correct, though a few questioned why the diode was hooked up from the emitter to the base.

Any suggestions?

[jonnydavro]

Hi kmh.Can you just check the value of your pot as it says 1m in the pic and that is 1 mega ohm,you want a 1k ohm pot.
I think your problem may be you are not inducing enough voltage in your coil.This can because your coil has not enough windings or you are not spinning the magnet fast enough and close enough to induce the voltage to trigger the transistor.I can't emphasise enough how important a good spin is.If still no luck,reverse your trigger coil connections and repeat your tests.
You need to have your amp meter set on mA and it won't read anything until you spin the magnet or fixed rotor in front of the coil.
If you still can't get your circuit to work,have a look at this video by the daftman.He makes it very easy to get a runner.Let us know if you have any luck.Jonny.
YouTube - Bedini pulse motor, build and diagram video 1 of 3.(TheDaftman)

[kmh]

Would a 5k pot work in its place? It is the closes I can find at the local RadioShack. All they had in this style pot was 5k, 10k, 100k, and 1m. While I understand the general purpose of the pot, I do not fully grasp at the impact it has on the overall effectiveness of the motor.

[rave154]

a 5k pot will work ok.but will need to have it turned down low...also.need to have at least maybe a 100 Ohm resistor in series with the pot..so that if you turn the pot down to minimum...you still have 100 Ohm's as a base resistance...sort of safety guard