Bedini SG

[dambit]

Hi,

You are correct. Only one trigger is required for as many transistors as you like.

Nice build by the way.

Cheers,

Steve.

[tjnlsn255]

Hi All,

Does anyone know what the specs are for the SCR and Neon in the cap pulser circuit? Part numbers would be great.... I use Mouser online....

I think the Neon's that I have are 60 volts.

Thank you.....

Tj

[Shamus]

Hi Tj, I believe the neons are just bog standard NE-2s and the SCRs are rated for 800V. If you're using Mouser, you can narrow down your search by putting SCR for the part and selecting 800V and above.

[tjnlsn255]

Thank you Shamus....

Do you know how the SCR/Neon circuit works?

What is the actual threashold that is triggered that causes the cap to discharge?

Have a great day......

Tj

[Shamus]

If it's the version that I'm thinking of (with the neon between the gate and the anode of the SCR) then the threshold for firing that combo would be the breakdown voltage of the neon bulb, which is, for the NE-2, I think about 90V (going from memory here).

Come to think of it, I'm not sure which circuit you're talking about, but for neon/SCR combinations, that's how it works. I do know that the trifilar capacitor dump version works on a timer circuit, but that's probably not what you're talking about here.

[glenn_aircooled]

Hi,

You are correct. Only one trigger is required for as many transistors as you like.

Nice build by the way.

Cheers,

Steve.

Thank You. I will get a better photo, but I wanted to tidy up all the wiring.
It is a Heavy wooden Wheel [ cut from Solid wood Door ].
Will be doing the winding with former next time. Did it free-style , thinking I could
keep ends square........no chance.
Glenn.

[dambit]

Hi Glenn,

Yeah, I gave up on winding the larger coils myself. Couldn't be bothered.

Cheers,

Steve

[kent_elyue]

I read at the outset that this thread is for the BediniSG without the capacitor section in the output. Is there a thread for the SG that utilizes the capacitor in the output?

I ask because I came up with an idea for a passive dump section based on the SCR/Neon concept, but using a White LED instead of the Neon, and "piggybacking" two different SCR's to get it working properly. It seems to work for me. It automatically dumps the capacitor into the battery at about 3 volts above battery voltage. I tune the dump rate by adjusting the capacitor value so as to target about 12-20 pulses per second.

[Mark]

Hi Kent

Do you have a schematic for your dump set up.

[kent_elyue]

Here is the current design I'm testing out. I use a small .01uf cap on the energizer stage to attempt to capture as much of the high-frequency energy as I can, kind of like you see in a power supply filter circuit. I then feed that to my large storage capacitor.

I had to use two SCR's because I needed 2 requirements: 1) low gate holding current, and 2) high voltage/ high current capabilities. The combination of the common C106 and the BTA16 provide that for me. The BTA16 is a 16amp, 600 volt SCR that I located online. Any other similar device should work.

I needed the 1K resistor simply to protect the LED from too high a current, but it's value is rather arbitrary. I tried a few different values and they seemed to have minimal impact.

[uusedman]

YouTube - Bedini-Newman Hybrid 5-1

My latest video innovation.

A little Bedini motor providing enough energy to run a medium size Newman motor.

[morpher44]

Tesla Fan

It would be so cool to see a Bedini SSG working with a
Tesla Fan.

YouTube - Nikola Tesla - Fan New York 20.April.1911

[uusedman]

I need help understanding why my Bedini motor when it is no collecting the BEMF is pulling on average .40 amps and when I collect the BEMF the amp draw go up to .60 .

The circuit that is being used is a Master-Slave-Slave.

Thanks

[Sephiroth]

I need help understanding why my Bedini motor when it is no collecting the BEMF is pulling on average .40 amps and when I collect the BEMF the amp draw go up to .60 .

The circuit that is being used is a Master-Slave-Slave.

Thanks

What's happening to the "back emf" when you are not collecting it? Are you shorting it out or is it going through the neon?

[uusedman]

What's happening to the "back emf" when you are not collecting it? Are you shorting it out or is it going through the neon?

I have neons burning the energy