Bedini SG

[salman144]

Hi Salman,
your currents look about right. I like your build it looks clean and solid

what are your coil specs? wire length, awg, core, etc...
what is your RPM?
are your magnets ceramic?
in the scope shot, why are some of your on times longer than others?
the neon's will not always protect your transistors, they are meant as training wheels, I would not disconnect the charge battery.
do you have your power supply connected directly to the energizer input?
you should at least put a large cap in between.
if you want better charging you should use a large/huge LAB on the front end. One that will take your 1.5Amp (preferably 2amp) at a C20 discharge rate.
JB offers a ton of info in his posts here on this old forum:
Bedini_SG : Bedini SG Discussion List
search his posts

Patrick

Coil specs: trigger coil AWG#26 , All 8 power coils AWG#23
Wire length : about 450 turns each
Magnets are ceramic.

"why are some of your on times longer than others?"
Well i don't know the exact reason yet.

Yes power supply is directly connected to energizer.

"you should use a large/huge LAB on the front end."
I didn't get that ..............LAB??

I think i need to tune my circuit a little..

[minoly]

Hi,

I just made bedini multi coil circuit. I made 8 power coils.
Schematic is attached.
I used BDC243C transistor.
I got about 150V peak at ouput, approx 1.45~1.55A input current.
The current to 12V,5.4Ahr battery was about 0.55~0.65A.
When i disconnected the battery(i have attached neon bulb for safety), the input current started to increase and so is the rpm of wheel.
But when i connected the battery rpm was slow. Just input current was greater
if we compare it with single coil SG.

Any suggestions... to improve rpm and charging rate.
I haven't yet tested the charging rate for this multi coil SG. I will update that soon.

Salman.

Hi Salman,
your currents look about right. I like your build it looks clean and solid

what are your coil specs? wire length, awg, core, etc...
what is your RPM?
are your magnets ceramic?
in the scope shot, why are some of your on times longer than others?
the neon's will not always protect your transistors, they are meant as training wheels, I would not disconnect the charge battery.
do you have your power supply connected directly to the energizer input?
you should at least put a large cap in between.
if you want better charging you should use a large/huge LAB on the front end. One that will take your 1.5Amp (preferably 2amp) at a C20 discharge rate.
JB offers a ton of info in his posts here on this old forum:
Bedini_SG : Bedini SG Discussion List
search his posts

Patrick

[salman144]

Bedini SG with multi coils on same spool

Hi,

I just made bedini multi coil circuit. I made 8 power coils.
trigger coil adjustable resistance is 20 ohm.
Schematic is attached.
I used BDC243C transistor.
I got about 150V peak at ouput, approx 1.45~1.55A input current.
The current to 12V,5.4Ahr battery was about 0.55~0.65A.
When i disconnected the battery(i have attached neon bulb for safety), the input current started to increase and so is the rpm of wheel.
But when i connected the battery rpm was slow. Just input current was greater
if we compare it with single coil SG.

Any suggestions... to improve rpm and charging rate.
I haven't yet tested the charging rate for this multi coil SG. I will update that soon.

Salman.

[Kebob]

Picture would be handy, if you can. One more thing; what transistor are you using and did you connect it right (did you figure out which pin is which in terms of base/emitter/collector)?

V

yeah im done for tonight ill try anfdget this working outside of school talk to you guys later

[blackchisel97]

cant get the rotor to spin want me to take a pic of my setup

Picture would be handy, if you can. One more thing; what transistor are you using and did you connect it right (did you figure out which pin is which in terms of base/emitter/collector)?

V

[Kebob]

Did you get your rotor running?
LED is connected to the separate coil, each leg to the end of a wire. Polarity doesn't matter. If you bring this coil close to the rotating rotor you'll see the LED getting bright. Passing magnets will induce electric potential in the wire, just enough to power LED. If you look at my youtube with starship coil, you'll notice a round black ring with green LED which I hold over the top of the coil. This is the same idea, except my coil is different shape.
Generator coil is just a small coil with LED. Separate from the main circuit and not connected anywhere.

V

cant get the rotor to spin want me to take a pic of my setup

[blackchisel97]

and then what else do i have to do from there to connect a led light and make it light of when i spin the rotor

Did you get your rotor running?
LED is connected to the separate coil, each leg to the end of a wire. Polarity doesn't matter. If you bring this coil close to the rotating rotor you'll see the LED getting bright. Passing magnets will induce electric potential in the wire, just enough to power LED. If you look at my youtube with starship coil, you'll notice a round black ring with green LED which I hold over the top of the coil. This is the same idea, except my coil is different shape.
Generator coil is just a small coil with LED. Separate from the main circuit and not connected anywhere.

V

[Kebob]

and then what else do i have to do from there to connect a led light and make it light of when i spin the rotor

[blackchisel97]

well i worked alot on this and it dosent work cant find the problem. if somebody could me a step by step tutorial for what you do with the wires extending from the coil becuase i can not get this to work please help

Ok, I'll try do my best.

First, coil: Your coil should be wound clockwise, starting from the bottom. In other words when you hold the spool in your left hand and wind with right, your right hand should move in clockwise motion.
Now, if you just did that, the end which you're holding and the start of wires will be the bottom. The other end and end of wires I'll refer as a top.
Coil bottom is the part the coil "sits" on and the top is facing rotor.
You have two pairs of wires; two beginnings (bottom) and two ends (top).
These wires will become a trigger coil (with its beginning and end) and power coil (with beginning and end).
Determine which ends belong to the same wire.
Bottom wire of one winding goes to the collector of your transistor. End of this wire goes to the "+" of battery.
Bottom wire of second winding goes to the "-" of battery. End of this wire goes to the resistor connected to the base of transistor.

This is always confusing to first time builders and causes frustration. Make sure everything is connected as I just wrote.


V

[Kebob]

It means that circuit can be connected to the ground or Earth and this is a common connecting point for the emitter,diode,coil and neg. battery post. Don't worry about the ground connection right now.

V

well i worked alot on this and it dosent work cant find the problem. if somebody could me a step by step tutorial for what you do with the wires extending from the coil becuase i can not get this to work please help

[blackchisel97]

It means that circuit can be connected to the ground or Earth and this is a common connecting point for the emitter,diode,coil and neg. battery post. Don't worry about the ground connection right now.

V

[blackchisel97]

ok so in this pic

i need to know what the base means in the picture

When you want to attach pic, scroll down to additional options, select manage attachments, new window will open. Browse and select your pic and select upload.

V

[Kebob]

ok so in this pic

i need to know what the base means in the picture

what does the grond mean in the basic diagram on page 50? i need to know asap

[Kebob]

It will be best to solder and secure with tape. You don't have to wrap tape around because it will make following layer messy. Just fold couple times. If this connection will become loose your circuit will stop working and you'll need to unwind to fix it. Make a good solder.

V

ok so in this pic

i need to know what the base means in the picture

[blackchisel97]

ok i have two wooden pieces to hold it it in and i have some extra wire which i guess i will have to use. also can i use electrical tape to connect the magnet wire together? or do i have to solder it?

It will be best to solder and secure with tape. You don't have to wrap tape around because it will make following layer messy. Just fold couple times. If this connection will become loose your circuit will stop working and you'll need to unwind to fix it. Make a good solder.

V