Joule Thief

[gnino]

When you start the video, the meter is showing the current at about 0.5 amp, right? Then you switch to voltage and it shows 25 volts or a little more, right?
Yes

It doesn't surprise me that a 12 volt, 35 watt bulb would get pretty bright on 25 volts, 0.5 amp supply. (I presume the lit bulb is one from the package you show.) Without a measure of light output it's hard to tell if the bulb is brighter than it should be with a 13 Watt supply.

What "Tesla patent" do you refer to?

Tesla bifilar coil 512,340
Giving a schematic that does not show the correct component values, parts count and transistor part number,  is like giving a person in Madrid, a London subway map and expecting them to find their way to the Louvre.
Transistor mje13007
680 ohm resistor
0.1k 400volt capacitor across resistor
25 volt 4700 Uf buffer capacitor
Inductance unknown
Number of turn unknown old toroid maybe 30



Do the "X"s within the circles mean the light bulb(s)? Does the schematic show two bulbs?
Yes
Does the video show one bulb?
No the second bulb (same value) is between the positive of the power source and the positive of buffer capacitor

Please provide a _correct_ schematic that corresponds to the circuit you show in the video, with all the correct component values including transistor part number. If you don't know the inductances of the windings just give the number of turns on the toroid for each one, please.

[gnino]

It doesn't surprise me that a 12 volt, 35 watt bulb would get pretty bright on 25 volts, 0.5 amp supply. (I presume the lit bulb is one from the package you show.) Without a measure of light output it's hard to tell if the bulb is brighter than it should be with a 13 Watt supply.

You are right with 6 volt 2 amp straight dc I get aproximate same ammount of light
My questione is why the other bulb stay off?
Can you explain to me so i can move on in other direction?
Thanks
Ciao Luca

[TinselKoala]

Thanks for listing the component values and providing the new pictures.

It seems that your actual apparatus has two transistors in it, but your schematic only shows one. And I can't tell how things are wired up, since you only showed the top side of the board. I can't tell from the pictures if the circuit is actually the same as what's on the schematic. Sometimes we make errors in wiring, and it's good to have another pair of eyes check to see if the schematic and the build actually are the same.

I don't know why the bulb attached to the power supply positive isn't lighting up... yet.  It certainly seems at first glance like it should! Are you sure your wires at the bulb's base aren't shorted together somehow? Does this bulb work by itself with just DC power?

I still don't have enough information to reproduce your circuit here so I can test it with the oscilloscope.

I don't see any relationship between your toroid windings and Tesla's patent 512,340 which describes his bifilar coil winding as applied to a flat pancake coil with no core, although he does extend it to other coil forms in the Claims.

So right now, I'm puzzled about the extra transistor, and the non-lighting bulb in strict series with the input power.

[gnino]

The Circuit is right no short Circuit no extra transistor
I fool myself your observation help me to understand
The other bulb don't light up because across it i read Only
0,5 volt i think is like a Voltage divider,if i disconnect the other
Bulb amp draw goes to 1amp and across the bulb i read 1,5volt
Seeing a light bulb on and the other off fool me
Thanks and sorry! For waste your time for nothing special
Thanks again

Ciao Luca

[gnino]

I don't see any relationship between your toroid windings and Tesla's patent 512,340 which describes his bifilar coil winding as applied to a flat pancake coil with no core, although he does extend it to other coil forms in the Claims.

You don't think that six wireless litzed and connected in series
End start end start end start.........
Is related to tesla patent?