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Author Topic: Bedini Transistor Problem  (Read 12729 times)

earthbound0729

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Bedini Transistor Problem
« on: January 10, 2016, 06:18:15 AM »
Hello All,

I seem to be having a Bedini Transistor Problem.

A little history first:
Coil is 8 filar
Transistors used- TIP3055, SC5027
Battery- 12 volt 18ah


I have built the Bedini circuit described in the Bedini Beginner's Handbook. I have noticed that the transistor Collector-Emitter appears to be in an open state as soon as I connect the run battery. This is proven because of the light I have connected across the Collector and base. I am using a 12 volt car light merely to check to see if there is voltage available at anytime. The base is not even energized in the normal way.
This is very bizarre as I even checked it without the Trigger coil wires connected to anything on my second go round and the magnets are not being rotated.
This is being done via a breadboard.

Any suggestions would be appreciated.
TY,
earthbound


I honestly cannot figure any other way that the circuit could be in an open state.

TinselKoala

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Re: Bedini Transistor Problem
« Reply #1 on: January 10, 2016, 08:04:49 AM »
Hello All,

I seem to be having a Bedini Transistor Problem.

A little history first:
Coil is 8 filar
Transistors used- TIP3055, SC5027
Battery- 12 volt 18ah


I have built the Bedini circuit described in the Bedini Beginner's Handbook. I have noticed that the transistor Collector-Emitter appears to be in an open state as soon as I connect the run battery. This is proven because of the light I have connected across the Collector and base. I am using a 12 volt car light merely to check to see if there is voltage available at anytime. The base is not even energized in the normal way.
This is very bizarre as I even checked it without the Trigger coil wires connected to anything on my second go round and the magnets are not being rotated.
This is being done via a breadboard.

Any suggestions would be appreciated.
TY,
earthbound


I honestly cannot figure any other way that the circuit could be in an open state.

Please post the exact schematic you are using, including how you are testing it.


citfta

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Re: Bedini Transistor Problem
« Reply #2 on: January 10, 2016, 12:42:21 PM »
Hello All,

I seem to be having a Bedini Transistor Problem.

A little history first:
Coil is 8 filar
Transistors used- TIP3055, SC5027
Battery- 12 volt 18ah


I have built the Bedini circuit described in the Bedini Beginner's Handbook. I have noticed that the transistor Collector-Emitter appears to be in an open state as soon as I connect the run battery. This is proven because of the light I have connected across the Collector and base. I am using a 12 volt car light merely to check to see if there is voltage available at anytime. The base is not even energized in the normal way.
This is very bizarre as I even checked it without the Trigger coil wires connected to anything on my second go round and the magnets are not being rotated.
This is being done via a breadboard.

Any suggestions would be appreciated.
TY,
earthbound


I honestly cannot figure any other way that the circuit could be in an open state.

Please post the info TK asked for.  But an equally important question is "What do you mean by open?"  To those trained in electronics open means having no connection like an open knife switch.  Open in electronics also can mean the transistor is defective and cannot turn on.  To those not trained in electronics open means to many of them open like turning on a faucet.  So do you mean the transistor appears to be on all the time with no power to the base?  Or do you mean it will not turn on?  Also as TK asked how are you checking it?  If your bulb lights when you connect one end to the collector and the other end to the emitter then that is normal with no signal to the base.  The 12 volts is going from the battery through the coil to the collector.  With the transistor off you should see the light light.  When the transistor turns ON the transistor then grounds the end of the coil so current can flow through the coil.  I am not sure which circuit you are using but the SSG that uses a wheel and magnets has to be spun by hand to get it to trigger the trigger winding and start the machine.

These are just some of the things I have seen from those new to electronics and the Bedini circuits.  I have helped dozens of people get their Bedini circuits working so I am sure we can get yours to work also.  If possible please include an actual picture of your circuit.

Carroll

mscoffman

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Re: Bedini Transistor Problem
« Reply #3 on: January 10, 2016, 02:13:48 PM »
I haven't looked up the transistors you are using but the standard 2N3055 NPN is supposed to be open off
(leakage only) when there is no base drive. The bipolar transistor transfer equation is Iec = Beta * Ibe.
a current amplifier. There may be some small current in the circuit used to bias the transistor *towards*
the on state normally - but

This is consistent with what I know of how the Bedini Circuit works; The Magnet moving towards (or away) from
the trigger coil is what drives the transistor closer to being fully on. This is a magnetic mirror where the coil reflects
what the magnet looks like to the coil back to it in reverse polarity. Pushing or pulling depending on the polarity from
versus to. So that when the magnet is closest to the coil the transistor is most fully on.

To have it any other way would be to inefficient. You would be wasting energy turning the coil on when the magnet
is very far from the coil. The Bedini circuit is inherently efficient.

---

Change your 12V light experiment around, the bulb should be connect to the power supply plus terminal,
the other side of the bulb to the transistor collector and connect the emitter to the supply minus terminal.

Now if you touch the transistor base to the PS plus terminal the bulb should begin to light. If you use a low
value of resistor in series with base like 10 Ohms the bulb should still light, but a high value like 10KOhms
it won't. If you happen to have a current range DVM, you could validate the transistor transfer equation
above.   


earthbound0729

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Re: Bedini Transistor Problem
« Reply #4 on: January 10, 2016, 03:24:27 PM »
THank you all.

I will post this schematic data a little later today.

earthbound.

magnetman12003

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Re: Bedini Transistor Problem
« Reply #5 on: January 10, 2016, 11:17:39 PM »
Hello All,

I seem to be having a Bedini Transistor Problem.

A little history first:
Coil is 8 filar
Transistors used- TIP3055, SC5027
Battery- 12 volt 18ah
 
Try a TIP35C TRANSISTOR.  I HAVE HAD GOOD LUCK WITH THAT. NEVER BURNED OUT.

I have built the Bedini circuit described in the Bedini Beginner's Handbook. I have noticed that the transistor Collector-Emitter appears to be in an open state as soon as I connect the run battery. This is proven because of the light I have connected across the Collector and base. I am using a 12 volt car light merely to check to see if there is voltage available at anytime. The base is not even energized in the normal way.
This is very bizarre as I even checked it without the Trigger coil wires connected to anything on my second go round and the magnets are not being rotated.
This is being done via a breadboard.

Any suggestions would be appreciated.
TY,
earthbound


I honestly cannot figure any other way that the circuit could be in an open state.

earthbound0729

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  • Posts: 63
Re: Bedini Transistor Problem
« Reply #6 on: January 11, 2016, 02:30:33 AM »
Alright everyone.
Here are some pictures to see.

The first shows a complete topdown view of the entire project. Crude but everything is in order as far as I know. I built everything according to the plans.

The 2nd one shows only the small breadboard.
The SC5027 is an NPN with the 123 pins being Base, Collector and Emitter. I used this one because of the high voltages allowed. I also tried the TIP3055 which has the same pin configuration. Neither one worked in my setup.

Interestingly enough when I used these same transistors with the base being controlled by my Arduino and using much lower voltages across the Collector and Emitter, it lit an LED without incident.

The 3rd picture show only the 12 volt car light across the C-E junction.  The standard in the Bedini circuit, although has the voltage being 100 volts for a Neon bulb. I do have those as well, but didn't think to use them during this experiment as I was only interested in being sure the circuit is working at all, not in how much voltage is being generated.

Thanks to anyone who can help sort this out. I am all ears.
earthbound

citfta

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Re: Bedini Transistor Problem
« Reply #7 on: January 11, 2016, 03:30:23 AM »
Ok a couple more questions.  Do you have a meter?  Can you post the schematic for us to look at?  I am talking about the electronic drawing that shows how all the parts get connected together.  I see one thing that doesn't look right if this is supposed to be the 8filer version of the SSG.  You don't appear to have the one end of the trigger winding connected to ground.  At least as far as I can tell from following the clip leads around.  It also appears you only have some of the 8filer wires connected.  How did you decide which ones to connect?  You also need to know the neon is to protect the transistor from the high voltage spikes.  You do not want to run the circuit without the charge battery as then you will be flashing the neon bulb as it protects the transistor.  I can't really tell, so what kind of magnets do you have on the small wheel?  This whole circuit works much better with a small bicycle wheel and a few more magnets.  Those small wheels can be used but it takes some pretty good knowledge about how to tune things to get them working right.  One last question, have you built a simple bifiler SSG and gotten it to work?

earthbound0729

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Re: Bedini Transistor Problem
« Reply #8 on: January 11, 2016, 04:19:22 AM »
hello citfta and all others,

Here is the circuit picture.

I do have a meter. How would you wish for me to try this?

I am only connecting a single Main coil wire to a single transistor. In this circuit the trigger wire is connected at one point as seen in the circuit drawing. In another attempt, The trigger coil is not connected at all. The point is, there is voltage coming through the Collector-Emitter without there being any input to the Base. That is why it appears to me that there is a closed connection through there.

I am purposely not using a charge battery and using the light to merely show the voltage coming off the Main coil, but as I have said, I get power right from the battery through the Collector- Emitter, and there is no reason to even attempt spinning the wheel rotor at this point because the circuit is not right in some way.

My magnets are 5/8" neodymiums. If I interrupt the power myself I can get the rotor to spin. Of course it is impossible to keep that up efficiently.

Quote
One last question, have you built a simple bifiler SSG and gotten it to work?
No I have not. I felt this would work the same way if I only used  1 of my 7 main coil wires and the trigger coil wires, as long as i could work out the kinks.

TY,
earthbound

citfta

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Re: Bedini Transistor Problem
« Reply #9 on: January 11, 2016, 12:01:56 PM »
I am going to suggest a few things to try.  First you should know that neos are not recommended as they are too strong for this circuit.  You only need a magnet strong enough to trigger the base of the transistor.  But we will see if we can get it running with what you have.  I am going to give you a set of steps to follow.  Please complete each step in order and if you have a problem then ask and we will solve that problem before going to the next step.

For the first step I want you to install the neon from the collector to the emitter to protect the transistor for when we get your circuit working.

From your description of your problem I am understanding that as soon as you try to run the circuit the coil energizes and and does not turn back off.  It that is correct then the coil should either be attracting a magnet and holding it so the rotor can't turn or it should be repelling the magnets away from the coil.  If the coil is attracting a magnet and holding it then you need to swap the ends of the power coil.  By that I mean to take the end that is connected to the battery and connect it to the collector and take the end that was connected to the collector and connect it to the battery.  After this connect power to the circuit and give the wheel a very hard spin.

If the coil when powered keeps pushing the magnets away then you need to swap the trigger coil ends and then try it again with a hard spin.  After you get it to work you need to replace the resistor with a pot (potentiometer) so that you can tune the circuit with a charge battery connected.

If those suggestions don't work then I need you to take some measurements with your meter.  With power to the circuit.  I want you to measure the voltage at the collector by putting one meter lead at the emitter and the other end at the collector.  I also want you to measure the voltage at the base by leaving one lead on the emitter and putting the other lead on the base connection.  Please post that information so we can work out what to try next.  I don't think we will need to do this as I think the above steps should solve your problem but I included this to give you some more help.

Let me know what happens and good luck.
Carroll

PS: I just realized something.  If you have not tried this circuit without the automotive bulb that is probably the cause of your trouble.  Connecting the bulb from collector to emitter creates a low resistance path the will turn on the coil and cause problems.  Do not connect the auto bulb to any part of the circuit and then test everything again.

earthbound0729

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Re: Bedini Transistor Problem
« Reply #10 on: January 11, 2016, 01:17:33 PM »
Thank you citfta for these recommendations.

I will try these later today and get back with you this evening.

earthbound.

earthbound0729

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Re: Bedini Transistor Problem
« Reply #11 on: January 11, 2016, 01:23:00 PM »
One other thing I noted when doing a continuity check with the CS5027 transistor and that is the collector pin is connected to the backing plate and therefore could be grounded easily. Since I'm not an electrically trained person I don't know about these things, just merely making a note. The reason I see this as important is because the positive from the battery runs through here via the Main coil and because this backing plate is often in contact with a heat sink.

TY,
earthbound

earthbound0729

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Re: Bedini Transistor Problem
« Reply #12 on: January 11, 2016, 08:04:54 PM »
To mscoffman

Quote
.....This is consistent with what I know of how the Bedini Circuit works; The Magnet moving towards (or away) from
the trigger coil is what drives the transistor closer to being fully on. This is a magnetic mirror where the coil reflects
what the magnet looks like to the coil back to it in reverse polarity. Pushing or pulling depending on the polarity from
versus to. So that when the magnet is closest to the coil the transistor is most fully on.

To have it any other way would be to inefficient. You would be wasting energy turning the coil on when the magnet
is very far from the coil. The Bedini circuit is inherently efficient.

---

Change your 12V light experiment around, the bulb should be connect to the power supply plus terminal,
the other side of the bulb to the transistor collector and connect the emitter to the supply minus terminal.

Now if you touch the transistor base to the PS plus terminal the bulb should begin to light. If you use a low
value of resistor in series with base like 10 Ohms the bulb should still light, but a high value like 10KOhms
it won't. If you happen to have a current range DVM, you could validate the transistor transfer equation
above.   

In trying to understand your info I seem to see this:

I looked over the entire Bedini schematic and can now see clearly why MY setup is wrong. My 12 volt light bulb, even though connected properly, will continuously be lit simply because I am connecting the bulb straight to the positive and negative sides of the battery at the same time. I am not really going through the transistor circuit because I have bypassed it essentially.

It would seem that by using the higher voltage Neon as directed it would prevent the passage of that 12 volt energy through it, maybe acting as a resistor, and force the 12 volt energy to be directed through the transistor as intended when the base is energized by the Trigger coil and thereby activating the pathway from the collector to the emitter..

Any comments? I will definitely try this tonight after I get home and get back to the forum with my success.
TY,
earthbound

earthbound0729

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Re: Bedini Transistor Problem
« Reply #13 on: January 11, 2016, 08:08:23 PM »
Additionally, I will put the 12 volt light bulb downstream on the emitter side and keep the Neon in the crossover state as mentioned last post. At least that way I will able to see the results of the energy going through the trasnsistor when the base actually energizes it.

earthbound

earthbound0729

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Re: Bedini Transistor Problem
« Reply #14 on: January 11, 2016, 11:03:05 PM »
OK citfta. WE have contact. Hooray!

Now to share some data with the energizer spinning.
Voltages:
  a. Through the base - 1.56 volts without a resistor. Using the 470 ohm resistor. No go.
  b. Collector to ground- 9.10 volts
  c. Emitter to ground - ~200 mv

The neon never came on that I could see. I would have thought I would have some light pulsating based on expected values from the Main coil field collapse.
I heatsinked the transistor and it got very warm.

Your requested values. Will be very close as above.

Emitter to Collector--8.95
Base to Emitter - 1.76 - 1.805

I am not using caps or a charge battery yet off the charge circuit.

Looking forward to the next class citfta.

TY,
earthbound