Quote from: itsu on May 03, 2014, 05:05:53 PM
Ok, another replication attempt with similar results as the ones before on this thread.

the transistor, its an IRFS630a MOSFET

Regards Itsu

You guys do know a PNP != FET ... the current doesn't go through the gate, and you'll likely need a pulldown to relieve the gate voltage...
a transistor the current always flows from the gate ... so it is a self pulldown...


so this inverter chip; is it meant for a mosfet or a transistor?


Edited: nevermind; I know the point isn't how it should conventionally work... maybe the specs are confused because it's an exploit of a flawed thing
so ya; ignore that

Quote from: itsu on May 03, 2014, 05:05:53 PM
Ok, another replication attempt with similar results as the ones before on this thread.

Using the TKLABS V1.4 diagram (thanks TK), with some component modifications for:

the transistor, its an IRFS630a MOSFET
The D1 diode is an MUR120
The inverter is a HEF4069UBP
The transformer is a E-core for the time being with low inductance, but with the copper tape both inside and outside.

the rest is as close as i could get it with the components available.

supply voltage and potmeter adjustments is very critical as mentioned before.

First run trail today, see screenshot and video.

Screenshot shows:

Purple trace (3) drain voltage
green trace (4)  gate signal
yellow trace (1) top of D1 diode (MUR120)
blue trace (2)   pin13

All with reference to ground.

Video here:  https://www.youtube.com/watch?v=35HnqJeJzJs&feature=youtu.be         


Regards Itsu

Looks nice Itsu... you are off to a good start I think. You can already see one thing: your mosfet isn't really switching at all, the Drain is staying at Battery voltage, yet you have oscillation bursts and the beginnings of a sinus signal. Do you have the larger inductance on the 34063 side? If not.... try it. Also try sticking an NPN transistor in there instead of the mosfet. B=G, C=D, E=S.

The schematic in that nice format is, I think, originally verpies's work, and it has gone through some changes, as you see. My last version is still working strong, drawing about 10 mA, making the approved waveforms, humming the ferrite, but the LEDs still go out when I pull the power.

Delamorta video 4
https://www.youtube.com/watch?v=bYEuV-ji4tk


Did everyone see the spacer in the center of the pot core at time 1:20?

Quote from: dewetw on May 01, 2014, 06:09:31 PM
Lasersaber
has done some increadible work based on the same look pot core, check his video:
https://www.youtube.com/watch?v=8dq9NQhzdw0

Cool! 

Quote from: dllabarre on May 03, 2014, 10:11:07 PM


Delamorta video 4
https://www.youtube.com/watch?v=bYEuV-ji4tk


Did everyone see the spacer in the center of the pot core at time 1:20?

Yes, see.