COP 17 Heater | Rosemary Ainslie | Part 2

[b4FreeEnergy]

Zoomed in



@sucahyo: Zoomed in at the requested area.
I have the feeling the frequency range of the 555 as it is set up now is too small to get to the desired area of oscillation?

@Rosemary: Any 'tips' here?

Cheers,
B

[b4FreeEnergy]

The link works in Windows media player

I think Ash has given the 'tuning' link but the problem here is that I can't open it.

If you open media player and you insert the link Ash posted (open it with the URL) it works, you can see the video but there is no audio? Is that intentional? No audio?

Regards,
B

[witsend]

@sucahyo: Zoomed in at the requested area.
I have the feeling the frequency range of the 555 as it is set up now is too small to get to the desired area of oscillation?

@Rosemary: Any 'tips' here?

Cheers,
B

Hi Bart. You need to set the timer pot at smallest 'on' and then play with the frequency. But I think you first need to adjust the gate pot to about 10 Ohms or thereby. Then play with the frequency - the faster the switching speed the better. Eventually, as you adjust the frequency you'll see the waveform default to plus/minus 50% on. That's the moment! That's when it goes into 'self oscillation' - regardless of the predetermined setting on the switch. You'll see this happen when the waveform just 'flops into' as we termed it - or defaults into - a 50% on - or thereby. Just look at the waveforms on the scope and keep tuning. Major aperiodic oscillation.

You'll not miss that 'moment'. Each circuit has it's own preferred resonating frequency. You need to 'find' it by this fine tuning. When you get there you then need to do some more minor adjustments of the gate pot to find that 'shadow cycle' or, as Glen refers to it 'the picket fence' harmonic. You'll see a lot about 'tuning' in the paper I sent you. Hope that helps.

Let me know if this makes sense.

By the way, I'm sorry I took so long to get back to you. A whole 12 hours. I'll be more alert next time. I see now that you work at light speed. LOL.

[witsend]

By the way. Is channel 1 across the shunt? If so it's looking very promising. You just need to get that 'self oscillation' number. When you get it you'll see it immediately. The waveform just starts 'pumping'. Check out Glen's live broadcast numbers. They're what you're after.

[b4FreeEnergy]

By the way. Is channel 1 across the shunt? If so it's looking very promising.

There is a ‘label’ on the scope channels in the upper left corner of the scope screen. Yes it is a very small font, must be difficult for you to see. (I need glasses myself! )
CH1: Shunt - CH2: Drain of the MOSFET – CH3: The output of the 555 timer (pin3) – CH4: Battery voltage

Mmmh, I went to the entire adjustment range several times now. Nothing happens yet. I think I will increase the 555’s frequency a little bit by changing the capacitor values. I need to set that microcontroller at work. Way more easy to fiddle with!

Mazzeltov,
Bart

[witsend]

I've just found both posts. LOL. And thanks for the info on the channels. Check your pm. I'm gone until later this afternoon. WAY BEHIND in some much needed 'meetings'.

I think your proposed adjustments could be good. I'll get back asap.

Speak soon.
R

[witsend]

Bart? Nothing new here. I've been checking all afternoon. Hope all's OK. Just post here if there's still some problems.

Still holding my breath. LOL

BTW - I simply can't open Ash's link. Entirely defeated. But I'm happy to acknowledge the fault is probably mine. Just check out Glen's video broadcasts as a guide to the waveform. It may help.
added

[b4FreeEnergy]

My little frequency generator

Well, I did not feel like messing with that 555 and decided to write some code on a little microcontroller (Freescale MC9S08GB60) to do the same thing. It will give me all flexibility I could ever want.
The controller runs meanwhile, I can define the frequency and the duty cycle but I’m cleaning up things a little bit now. The output voltage of the uC has to be ‘lifted’ from 3V3 to 12V again. As soon as I have something a little bit ‘decent’ I will post it. I sure hope I can convince my little ‘Ainslie’-circuit here to go into that special oscillation mode and make a few nice pictures...

Mazzeltov,
B

[witsend]

Well, I did not feel like messing with that 555 and decided to write some code on a little microcontroller (Freescale MC9S08GB60) to do the same thing. It will give me all flexibility I could ever want.
The controller runs meanwhile, I can define the frequency and the duty cycle but I’m cleaning up things a little bit now. The output voltage of the uC has to be ‘lifted’ from 3V3 to 12V again. As soon as I have something a little bit ‘decent’ I will post it. I sure hope I can convince my little ‘Ainslie’-circuit here to go into that special oscillation mode and make a few nice pictures...

Mazzeltov,
B

Mazzeltov indeed Bart. Glad to hear of progress - but not sure what it is you're doing. Sounds good though. I'll wait patiently. LOL.

[b4FreeEnergy]

The link

That link Ash posted definitely works, I only don’t have audio and it looks like they are explaining a few things there which would be interesting to listen to of course. It doesn’t help much either to explain you how to open the URL in Microsoft Media Player since you’re working on an Apple I think.

Cheers,
B

[witsend]

That link Ash posted definitely works, I only don’t have audio and it looks like they are explaining a few things there which would be interesting to listen to of course. It doesn’t help much either to explain you how to open the URL in Microsoft Media Player since you’re working on an Apple I think.

Cheers,
B

No. Nothing seems to help. Not even my boffin friends can manage this on Teamviewer. But Ash will no doubt lend assitance eventually, when and if he gets here. But all's good Bart. I'm so intrigued with that microcontroller number. Dying to see how it works. But I don't want to interrupt you. I'll wait. Gladly.

[b4FreeEnergy]

Mmmh, I have my extended frequency range now but no luck yet. The duty cycle was fixed to about 50% and I went from 2 kHz till about 10 kHz. No happy ‘Ainslie’ oscillation yet.

I guess I need a parameter to concentrate on to give an early indication that I’m going in the right direction. Now it’s the frequency, the duty-cycle and the gate-resistor. There are too much variables here.

Cheers,
B

[ashtweth]

Hi guys we used the mpeg2 codex, K-lite codec pack is the best (it runs all codecs free to down load )

Free-Codecs.com : Download K-Lite Codec Pack 5.8.3 FULL, K-Lite Codec Pack 5.8.3 STANDARD, K-Lite Codec Pack 5.8.3 BASIC : K-Lite Codec Pack is a collection of codecs and related tools
if any body cannot play with please let me know.

Ash

[Groundloop]

@All,

Download the KM Player found here:
KMPlayer - Download

It is free and plays ALL video formats.

Regards,
Groundloop.

[witsend]

Mmmh, I have my extended frequency range now but no luck yet. The duty cycle was fixed to about 50% and I went from 2 kHz till about 10 kHz. No happy ‘Ainslie’ oscillation yet.

I guess I need a parameter to concentrate on to give an early indication that I’m going in the right direction. Now it’s the frequency, the duty-cycle and the gate-resistor. There are too much variables here.

Cheers,
B

B. I am so, so sorry I'm not up on skype. Hopefully my computer will be up and running soon. I dare not use skype on my apple. Right now it's the only one of 3 computers that's working.

As you know - you're trying to find a 'self-oscillation' frequency in the circuit. If you 'fix' the duty cycle at 50% then - in point of fact you're also imposing a switching cycle which may well be incompatible with that required 'self resonance'.

What I used to do to find that required frequency was to turn my 'on' switch to about 3% on. Then I'd reduce the 'off' time through graduated steps until that magical moment when the waveform sort of 'tumbles' into that distinctive resonating frequency. If you don't find it the chances are you need to vary the frequency. As a guide here - just start at the 5 kHz range. That 'default' moment, when you find it, it will override that 'preset' setting. It simply ignores it. And it then also 'tumbles' into a much higher frequency. The phenomenon is NOT dependant on the preset fequency. It is dependant on the system finding it's own self-oscillation fequency.

What is proposed here is that this is the 'moment' when the energy from the load is either equal to or greater than the energy from the battery. The battery never quite discharges and the load never quite dissipates. While the temperature remains fairly constant so does the battery voltage.

I'm now just a little concerned that your microcontroller may be able to 'force' a duty cycle onto the circuit. Just don't know. I can see it's value when you can 'set' the microcontroller to hold that frequency. But it may be that you first need to find the required. I'll chat to Donny during the day and will report back here.



The only details regarding the gate pot is that the resistance should be set LOW. We used 10 Ohm - I think. Or thereby. Then you only need to come back here when you've got it into that 'chaotic aperiodic resonating frequency' which comes from adjustments at the switch.