Joule Thief

[nievesoliveras]

@all

Greetings!!!

It seems that everybody here has been having important achievements this year.

Jesus

[Groundloop]

Pirate88179,

Great looking lamp. Keep up the good work.

@WilbyInebriated,

WoW, that looks good. Have you tried more tubes in series?
My thought is that if the voltage and frequency is high enough then maybe
we can power up many more tubes in series. I'm currently making a coil
the size of a 9V battery. I will post as soon it is done, hopefully this weekend.
Great work done here.

Groundloop.

[nievesoliveras]

@all

I have been trying to get a 3w fluorecent bulb and I have not been able to get it. But I tried the circuit I replicated witha neon bulb on it and it lights it, meaning that at least 90 volts are produced.

When I test it with my meter it seems to put out more than a 1000v.
I say that, because, when I put the meter dial to the 1000 dcv, it flashes a bunch of numbers and then it only shows a 1. The same on the other dcv voltages.

Jesus

[WilbyInebriated]

Pirate88179,

Great looking lamp. Keep up the good work.

@WilbyInebriated,

WoW, that looks good. Have you tried more tubes in series?
My thought is that if the voltage and frequency is high enough then maybe
we can power up many more tubes in series. I'm currently making a coil
the size of a 9V battery. I will post as soon it is done, hopefully this weekend.
Great work done here.

Groundloop.

i haven't tried more tubes in series, mainly because i don't have any more. a friend is bringing me a few he had lying about, i will post a pic.

@jesus
nice job. do you have any small fluorescent tubes you can try with it?

[electricme]

Hello Pirate88179
Nice topic you got here bill, I have been a phantom looksee'er for the past week 

Verry interresting stuff here, I remember some of us on the Stubblefield sites had a bit of a go making these JT. I got the bug now.

Yesterday I tried to make my 1st JT, and it didn't work.
This morning I went on the net and took another look at the circuits, and tried all over again, and well, what do you know, it seems to work, chuckle.

I followed a circuit that shows a 1m resister before the B2 winding and it also has a BC549 transistor.
I didn't have those so I used a S8050 transistor I scavenged from a solar garden light, seems to be OK.

OK now for the happy stuff
I soldered in a switch in series between the 1.5v battery and the main circuit, soldered in a 200ohm Tpot to adjust the voltage going to the JT.
I got a red LED to stay on at .9 of a volt, without capacitors in circuit.

I have another LED which has flying leads fitered with small clips, connecting it across a 1.5v dri cell won't even give a dim glow, so I know the JT works.
I connected 3 leds up in parallel, on the orig settings of .717 volts and they lit up but were dimmer.

I put my cro on the output and can see a waveform at high freq, man this thing is realy flying along.

Then to make it more interresting I added another switch to switch a 1000uF electrolytic and a .1uF ceramic which are connected between the 1K ohm resistor, I can cut in either capacitor, not much difference, this boosts the light output quite a bit. and to make it interresting, the Leds light at .717 volt.

I put a 3rd switch at the LEDs, adding a Green one to the circuit, now I can switch between Red or Green Leds.

Yup, I had fun today.

jim

@  groundloop, I got your PM and will show you what I want to do, but got to readup 1st on inverters etc.
jim