News:

New registrations to the forum only by request to admin@underservice.org

Main Menu

Schematic self run system.

Started by Romero, March 14, 2012, 05:47:35 PM

Previous topic - Next topic

Hitman

Hey all,

Question to anyone who can answer,
What voltage would you want for a self runner at your gen coil if your input voltage is 6 volts.

Thanks Hitman

Romero

#16
Another suggestion for people to try.

David

Thank you Romero, I finished the circuit and is all working fine, now I need to see how long will last the power in the battery.
I started from 1.201v and it dropped to 1.198v but now is back to the 1.201v
Running from a supercapacitor does not work for me.

David

Romero

Quote from: David on June 11, 2012, 04:24:24 PM
Thank you Romero, I finished the circuit and is all working fine, now I need to see how long will last the power in the battery.
I started from 1.201v and it dropped to 1.198v but now is back to the 1.201v
Running from a supercapacitor does not work for me.

David
Good news David! Be patient even if the voltage goes down it will recover itself.
Below is a waveform from the circuit, I hope you understand what is there.

Regards,
Romero

garrym

#19
Hi Romero,

If you put an ampmeter on 1.5, what would you expect amp draw to be?

I put my circuit together and it is drawing near 200mA.

Think I did something wrong !

Thanks, Garry

P.s. I do get between 4 to 5v pulses at approx 5us

Romero

Quote from: garrym on June 16, 2012, 08:10:42 AM
Hi Romero,

If you put an ampmeter on 1.5, what would you expect amp draw to be?

I put my circuit together and it is drawing near 200mA.

Think I did something wrong !

Thanks, Garry

P.s. I do get between 4 to 5v pulses at approx 5us
in my case amp draw is 48-50ma. Just for curiosity add another turn on the primary...
What are the dimensions of the ferrite?

Romero

garrym

Thanks for the reply

toroid is 25mm od 15 id and 9 deep

plugged in a small ferrite module - probably out of pc psu
much better result.

Pics follow

Regards, Garry

Romero

@garrym
Is this the first circuit you replicated? very easy to step to the second one where I had better results.
I don't like the waveform you have, try to move the windings around the toroid.
Are you connecting the probe at the toroid output?
Don't leave the multimeter probes connected for a long time, hours, days... it will draw energy, just test it every now and then then remove it.
Don't expect to get lots of power here, nothing more that the led's bridge.

Regards,
Romero

garrym

#23
Hi Romero,

Yes, I replicated first circuit.

Will now move up to second one.

Much better results using mini transformers from  old PSUs.

I have just replaced C1 with 2.5v 55f Super cap - 4 leds reasonably bright and
stable voltage at 1.237. approx 80mA draw but stable!

Scope was across gnd and collector of bd 139

Garry

David

Hi Romero,

My circuit is still running after almost 6 days, voltage now is 1.200v but I had it down to 1.103v then it recovered back.
I am using a rechargable battery with a supercapacitor in parallel.
I am going to test the second circuit you posted, I will keep you updated.
Check you email,  I sent you something.

David

garrym

Nice one David.

Romero, where is your scope shot measuring across please?

Garry

Romero

Quote from: garrym on June 17, 2012, 02:39:16 AM
Nice one David.

Romero, where is your scope shot measuring across please?

Garry
Just above, post 509.

garrym

Sorry Romero,

I don't understand  - just abovepost 509 ?

I am wanting to know where to connect the scope probe and gnd, Thanks, Garry

Romero

Quote from: garrym on June 17, 2012, 04:10:13 PM
Sorry Romero,

I don't understand  - just abovepost 509 ?

I am wanting to know where to connect the scope probe and gnd, Thanks, Garry
Sorry, I had the impression you need to see it... :)
I connected the probes at the output of the coil, before the bridge.
I am attaching few more pictures from the same device.

Romero

crazycut06

#29
Here's my toy... ;D at first my amp draw was huge, 130ma, im thinking what is wrong, then i tried to change the 20pf to 333j then amp draw decreased too much to 5.9ma and the led is dimmed, but the battery voltage stars to climb up, will see how long it will last..