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Need help reading schematic

I found a pretty neat design at
http://www.pskovinfo.ru/coilgun/indexe.htm and the circuit diagram is
on http://www.pskovinfo.ru/coilgun/vcircuit.gif

The descriptions can be found on other pages.

I decided I wanted to build it, and did a lot of research finding out
what the values are for certain components and finding equivalent
components on Newark, but he left out the description of the diode
KD510. As far as I can tell, the only place that diode KD510 is
mentioned, in all of the WWW, is on his webpage.

Then he forgot to describe the transformer on the DC/DC unit.

I'm not an EE, I'm only a tech and hobbyist, so maybe someone can help
me?

Jason
 
Oh, for those who are interested.

KD212 is equivalent to Newark part 33C1016
KC482A is equivalent to Newark part 16F6180
FR207 is equivalent to Newark part 26C2837
T122-25-12 is equivalent to Newark part 48F1271
D122-25-14 is equivalent to Newark part 26C2837

Jason
 
P

Paul Burridge

Jan 1, 1970
0
Any signal diode should do. I suggest 1N4148.

Why's that, John? Is it simply the fact that there are 18^120 of them
in existence?
 
Paul said:
Why's that, John? Is it simply the fact that there are 18^120 of them
in existence?

To be fair, since the designer said "KD510 any small impulse diode".
So that suggestion should probably work. It's the coils that are the
real bugger.

He describes the main transformer as "I use ferrit drossel (usually
from any small DC motors filter). This drossel has one-layer coil and
ferrit pipe core with two axial pin. I turned second one-layer coil.
The turns ratios per side are one to one."

The main inductor is described as "Main coil has 310-320 turns wire
diameter 2 x 0.6 mm (one 0.85mm or pair 0.6mm). I have many 0.6mm wire
and use pair instead of 0.85mm." It should be noted there's a hole
through the center of the main inductor coil.

The sensor coil is described as "Sensor has 3 layer wire diameter
0.1mm. Sensor has ferrit core diameter 2.5 mm length 10 mm."

The DC/DC Unit transformer is describes as "The transformer in the
DC/DC converter has ferrite caps core one inch diameter. First coil
has 10 turn of 0.6 mm wire and second coil has 400 turns of 1.5 mm
wire. Ferrite caps core has small non magnetic clearance (about
0.1mm)."

Now, I scanned Allied Electronics and Newark, and none of them describe
their transformers or inductors that way.

Jason
 
T

Tim Wescott

Jan 1, 1970
0
To be fair, since the designer said "KD510 any small impulse diode".
So that suggestion should probably work. It's the coils that are the
real bugger.

He describes the main transformer as "I use ferrit drossel (usually
from any small DC motors filter). This drossel has one-layer coil and
ferrit pipe core with two axial pin. I turned second one-layer coil.
The turns ratios per side are one to one."

The main inductor is described as "Main coil has 310-320 turns wire
diameter 2 x 0.6 mm (one 0.85mm or pair 0.6mm). I have many 0.6mm wire
and use pair instead of 0.85mm." It should be noted there's a hole
through the center of the main inductor coil.

The sensor coil is described as "Sensor has 3 layer wire diameter
0.1mm. Sensor has ferrit core diameter 2.5 mm length 10 mm."

The DC/DC Unit transformer is describes as "The transformer in the
DC/DC converter has ferrite caps core one inch diameter. First coil
has 10 turn of 0.6 mm wire and second coil has 400 turns of 1.5 mm
wire. Ferrite caps core has small non magnetic clearance (about
0.1mm)."

Now, I scanned Allied Electronics and Newark, and none of them describe
their transformers or inductors that way.

Jason
Transformers in switching supplies are often custom-made for the supply.
What he's describing is hand-winding his transformers on ferrite
cores. It sounds like he did it b'guess and b'gosh from surplus
ferrites. Either the application isn't critical, or he got lucky, or
there's a lot of experimentation there he didn't tell you about.

So what you need to do is figure out how to replicate his performance.
Chances are if you can get the dimensions of the cores he used you can
take a wild guess about material and hope you're right.

Not knowing what is commonly used for DC motor filtering in Russia I'd
say try 77 or 75 mix from Amidon -- http://www.amidoncorp.com. If it
were me I'd do some analysis and/or simulation on the circuit & design
the transformers from there.
 
T

Tam/WB2TT

Jan 1, 1970
0
................................
He describes the main transformer as "I use ferrit drossel (usually
from any small DC motors filter). This drossel has one-layer coil and
ferrit pipe core with two axial pin. I turned second one-layer coil.
The turns ratios per side are one to one."

The main inductor is described as "Main coil has 310-320 turns wire
diameter 2 x 0.6 mm (one 0.85mm or pair 0.6mm). I have many 0.6mm wire
and use pair instead of 0.85mm." It should be noted there's a hole
through the center of the main inductor coil.

The sensor coil is described as "Sensor has 3 layer wire diameter
0.1mm. Sensor has ferrit core diameter 2.5 mm length 10 mm."

The DC/DC Unit transformer is describes as "The transformer in the
DC/DC converter has ferrite caps core one inch diameter. First coil
has 10 turn of 0.6 mm wire and second coil has 400 turns of 1.5 mm
wire. Ferrite caps core has small non magnetic clearance (about
0.1mm)."

Now, I scanned Allied Electronics and Newark, and none of them describe
their transformers or inductors that way.

Jason
He is telling you how he made the transformer. You can't buy these things.

Tam
 
J

John Popelish

Jan 1, 1970
0
To be fair, since the designer said "KD510 any small impulse diode".
So that suggestion should probably work. It's the coils that are the
real bugger.

He describes the main transformer as "I use ferrit drossel (usually
from any small DC motors filter). This drossel has one-layer coil and
ferrit pipe core with two axial pin. I turned second one-layer coil.
The turns ratios per side are one to one."

The main inductor is described as "Main coil has 310-320 turns wire
diameter 2 x 0.6 mm (one 0.85mm or pair 0.6mm). I have many 0.6mm wire
and use pair instead of 0.85mm." It should be noted there's a hole
through the center of the main inductor coil.

The sensor coil is described as "Sensor has 3 layer wire diameter
0.1mm. Sensor has ferrit core diameter 2.5 mm length 10 mm."

The DC/DC Unit transformer is describes as "The transformer in the
DC/DC converter has ferrite caps core one inch diameter. First coil
has 10 turn of 0.6 mm wire and second coil has 400 turns of 1.5 mm
wire. Ferrite caps core has small non magnetic clearance (about
0.1mm)."

Now, I scanned Allied Electronics and Newark, and none of them describe
their transformers or inductors that way.

The author is describing how you should manufacture the coils,
yourself.
 
John said:
The author is describing how you should manufacture the coils,
yourself.

I was hoping to avoid that unless absolutely necessary. It seems to be
absolutely necessary if I want to build this.

Oh well, I'll build these, and then measure them, and then find
something at Newark with the same specs.

Jason
 
R

Rich Grise

Jan 1, 1970
0
Oh well, I'll build these, and then measure them, and then find
something at Newark with the same specs.

Are you developing something for production? Because if I had built a
coil, and got it working, I'd call it a day, so to speak.

Thanks,
Rich
 
Rich said:
Are you developing something for production? Because if I had built a
coil, and got it working, I'd call it a day, so to speak.

Thanks,
Rich

I have 5 family members who want one if I can get mine working. I have
no desire to wind that many coils.

Jason
 
J

jake ACG rep

Jan 1, 1970
0
That coil you are trying to replicate is an experimental coil. You
ought to try altering it to get best performance for your cap and
projectile arrangement. Us it as a baseline then vary the windings as
necessary. This is no quick fix pill. This is scientific
experimentation.
 
J

jake ACG rep

Jan 1, 1970
0
That coil you are trying to replicate is an experimental coil. You
ought to try altering it to get best performance for your cap and
projectile arrangement. Us it as a baseline then vary the windings as
necessary. This is no quick fix pill. This is scientific
experimentation.
 
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