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Author Topic: Oscillator Powering 6 Modified Led bulbs  (Read 6914 times)

Offline gyulasun

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #60 on: May 10, 2017, 06:19:18 PM »
Thank you Skywatcher for your answers and please one final one (hopefully), if I were to use 8 identical bulbs, there won't be need for an incorporated second circuit right? Which means only one transistor is required. If this were so, then which of the two transistors in your circuit should I use, the NPN or PNP?

Hi Naija,

Skywatcher will surely answer you,  let me give just a general piece of advice on transistor types:  basically what you would need is a high voltage rated fast switching transistor.  Such types are mainly NPN ones, preferably have low collector-emitter saturation voltage, VCEsat  and a relatively high hFE  Dc current gain, known also a Beta, Ic/Ib. 
These types are developed for switching mode power supplies or for electronic lamp ballast circuits.  If you cannot buy such types at your location, you may scavenge some from discarded PC power supplies, or 120V and 230V fluorescent light bulbs etc.

Here are some types, though you can surely find other types too, now that you know what to search.

Fairchild (now Onsemi) type FJP5554, see at Digikey, Farnel, RS Components, Mouser:

https://www.digikey.com/product-detail/en/fairchild-on-semiconductor/FJP5554TU/FJP5554TU-ND/1473889
400V 4A 70W, hFE is between 20 to 100, saturation voltage is max 0.5V at Ic=1A.

ST Microelectronics type BUL742C,  see at Mouser and Farnell,
http://eu.mouser.com/_/?Keyword=BUL742C   
400V, 4A, 30 or 70W, hFE is between 25 and 100, saturation voltage is typical 0.15V at Ic=1A.

Gyula

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Offline Naija

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #61 on: May 10, 2017, 07:41:05 PM »
Thanks very much Gyula. Your explanation is well appreciated.

Naija


Offline SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #62 on: May 10, 2017, 09:18:27 PM »
Hi Naija, you can use 8 indentical modified led bulbs, don't see a problem with that.
Yes, i used the separate circuit, because i had another set of 4 led bulbs that were different as far as forward voltage of led board and i didn't want to see those just sitting around.
I used the PNP for that separate circuit, because i had it on hand from a salvaged powered subwoofer, though if you wanted to use a separate circuit, you can use an NPN and if you use only one circuit, either NPN or PNP will work fine.
Gyulasun gave good advice for the transistor selection.
Thanks for correcting my circuit drawing gyulasun.
peace love light

Offline magnetman12003

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #63 on: May 14, 2017, 02:37:53 AM »
Hi Naija, you can use 8 indentical modified led bulbs, don't see a problem with that.
Yes, i used the separate circuit, because i had another set of 4 led bulbs that were different as far as forward voltage of led board and i didn't want to see those just sitting around.
I used the PNP for that separate circuit, because i had it on hand from a salvaged powered subwoofer, though if you wanted to use a separate circuit, you can use an NPN and if you use only one circuit, either NPN or PNP will work fine.
Gyulasun gave good advice for the transistor selection.
Thanks for correcting my circuit drawing gyulasun.
peace love light

I wonder what the circuit output to the bulbs looks like {Across the capacitor} on a scope??  I don't have one yet.


Offline Naija

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #64 on: May 20, 2017, 12:07:53 AM »
Hi Naija, you can use 8 indentical modified led bulbs, don't see a problem with that.
Yes, i used the separate circuit, because i had another set of 4 led bulbs that were different as far as forward voltage of led board and i didn't want to see those just sitting around.
I used the PNP for that separate circuit, because i had it on hand from a salvaged powered subwoofer, though if you wanted to use a separate circuit, you can use an NPN and if you use only one circuit, either NPN or PNP will work fine.
Gyulasun gave good advice for the transistor selection.
Thanks for correcting my circuit drawing gyulasun.
peace love light

Hello Skywatcher, how do I protect your circuit from accidental short circuiting of the output terminals?

Free Energy | searching for free energy and discussing free energy

Re: Oscillator Powering 6 Modified Led bulbs
« Reply #64 on: May 20, 2017, 12:07:53 AM »
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Offline SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #65 on: May 20, 2017, 01:19:54 AM »
Hi naija, a fuse is the only thing i can think of at the moment.
peace love light

Offline magnetman12003

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #66 on: May 21, 2017, 06:32:30 PM »
I just bought a AC to DC 12 volt 8.5 amp  power unit (102 watts) and when I connected it to my setup all
9 of my 7 watt bulbs in parallel with an extra 5 watt bulb included in parallel (68 watts)  go on and off continuously??????  NOTE: A regular 12 volt 12 amp hour battery will power all the bulbs continuously.  No on and off.
Just what kind of a AC to DC power unit do I need??  Please indicate on Ebay the correct type of supply I need.  You cant use a battery to figure out accurate circuit parameters as the voltage will start decaying as soon as its used.

Free Energy | searching for free energy and discussing free energy

Re: Oscillator Powering 6 Modified Led bulbs
« Reply #66 on: May 21, 2017, 06:32:30 PM »
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Offline gyulasun

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #67 on: May 21, 2017, 06:47:09 PM »
Hi magnetman,

Are the 9 bulbs + the extra 5W bulb nicely lit when you directly run them from the output of your AC to DC power unit? i.e. leave out your setup, ok?
From your description it looks like the 102 W power adapter is not capable to supply enough current at 12 V to feed the 12 V bulbs.  And of course you can always do measurements on the 12 V output when you start it loading say one by one with your lamps.

Gyula

Offline SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #68 on: May 22, 2017, 01:02:32 AM »
Hi all, Hi magnetman, I agree with the advice of gyulasun.

I have been making some experiments with my dual oscillator circuit that is powering the 8 led bulbs.
It has been working very well for me, when i need a lot of light up here.
So i decided to try the setup using the 3 battery, split positive method to power it.
The input watts to the circuit is normally around 8 watts with the 11.7 volt input from computer power supply.
With this 3 battery setup, that input voltage to the setup does diminish a bit over time, to about 10.5 volts when the charging battery is at 14 volts, yet still allows the led bulbs to output very good light.
Some interesting results so far, using the 12 volt tractor batteries.
I have started the test with Battery A and B in series as the primary input and battery C as the charge battery.
Rest Voltage, batteries have not been used for at least a couple weeks:                     
Battery A = 12.50 volts
Battery B = 12.52 volts
Battery C = 12.495 volts
Overnight Rest Voltage after 3 hour run time:
Battery A = 12.51 volts
Battery B = 12.515 volts
Battery C = 12.725 volts

Seems rather interesting so far, i will be continuing these tests by alternating the batteries to see where this goes.
peace love light

Offline magnetman12003

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #69 on: May 22, 2017, 06:59:57 AM »
Hi magnetman,

Are the 9 bulbs + the extra 5W bulb nicely lit when you directly run them from the output of your AC to DC power unit? i.e. leave out your setup, ok?
From your description it looks like the 102 W power adapter is not capable to supply enough current at 12 V to feed the 12 V bulbs.  And of course you can always do measurements on the 12 V output when you start it loading say one by one with your lamps.

Gyula
  A 12 volt 1.2 amp hour battery and a 12 volt  23a battery will light ALL bulbs powered through my setup???  But a 12 volt 8.5 amp DC power supply cant power all-- just pulse -- go figure??

Free Energy | searching for free energy and discussing free energy

Re: Oscillator Powering 6 Modified Led bulbs
« Reply #69 on: May 22, 2017, 06:59:57 AM »
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Offline Naija

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #70 on: May 22, 2017, 09:00:49 AM »
Hi all, Hi magnetman, I agree with the advice of gyulasun.

I have been making some experiments with my dual oscillator circuit that is powering the 8 led bulbs.
It has been working very well for me, when i need a lot of light up here.
So i decided to try the setup using the 3 battery, split positive method to power it.
The input watts to the circuit is normally around 8 watts with the 11.7 volt input from computer power supply.
With this 3 battery setup, that input voltage to the setup does diminish a bit over time, to about 10.5 volts when the charging battery is at 14 volts, yet still allows the led bulbs to output very good light.
Some interesting results so far, using the 12 volt tractor batteries.
I have started the test with Battery A and B in series as the primary input and battery C as the charge battery.
Rest Voltage, batteries have not been used for at least a couple weeks:                     
Battery A = 12.50 volts
Battery B = 12.52 volts
Battery C = 12.495 volts
Overnight Rest Voltage after 3 hour run time:
Battery A = 12.51 volts
Battery B = 12.515 volts
Battery C = 12.725 volts

Seems rather interesting so far, i will be continuing these tests by alternating the batteries to see where this goes.
peace love light

Hello Skywatcher, can you please explain more about the 3 battery - split positive method? How does it work? Diagrams will be appreciated. Is there a link to an article where I can study that? Thanks in anticipation for your reply

Offline SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #71 on: May 23, 2017, 12:02:06 AM »
Hi all, Hi naija, matthew jones and turion have done a lot of work using the split positive, 3 battery setups.
It is basically whatever you wish to power, placed between the positives of the 24 volt series battery and the single 12 volt battery, so the positive is the positive of the batteries in series for 24 volts and the negative is the positive of the 12 volt charging battery.
This gives you 12 volts for your load, so the batteries are essentially in parallel.
Then your load is between the positives and the negatives are connected directly to each other.
Still alternating the batteries and running the circuit for 3 hours and then letting it rest.
It is interesting to note, that the 3 batteries started out at a combined total voltage of 37.515 volts.
With 9 hours of total runtime so far and one complete cycle or all 3 batteries have swapped positions, with probably an average wattage of 7 watts, since the split positive voltage reduces as battery 3 charges.
The total combined voltage of the 3 batteries is at 37.64 volts.
peace love light



Offline Naija

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #72 on: May 23, 2017, 11:42:24 AM »
Hi all, Hi naija, matthew jones and turion have done a lot of work using the split positive, 3 battery setups.
It is basically whatever you wish to power, placed between the positives of the 24 volt series battery and the single 12 volt battery, so the positive is the positive of the batteries in series for 24 volts and the negative is the positive of the 12 volt charging battery.
This gives you 12 volts for your load, so the batteries are essentially in parallel.
Then your load is between the positives and the negatives are connected directly to each other.
Still alternating the batteries and running the circuit for 3 hours and then letting it rest.
It is interesting to note, that the 3 batteries started out at a combined total voltage of 37.515 volts.
With 9 hours of total runtime so far and one complete cycle or all 3 batteries have swapped positions, with probably an average wattage of 7 watts, since the split positive voltage reduces as battery 3 charges.
The total combined voltage of the 3 batteries is at 37.64 volts.
peace love light

Thanks, very educational. Am glued on, looking forward to your results!

Offline SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #73 on: May 24, 2017, 01:35:39 AM »
Hi all, Hi Naija, your welcome, i hope i have good results as well.
So far, it is getting interesting.
I have placed all 3 batteries in parallel, to equalize them.
The total voltage is resting at 37.65 volts.
This after 12 hours runtime so far, at around 7-7.5 watts average being used between the positives,
or around 90 watt/hours.
Now remember, these 3 batteries started out at 37.515 volts total and had not been used for a few weeks.
And overall, they have been climbing slowly in voltage.
We shall continue the experiment and see where it goes.
peace love light


Offline SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #74 on: May 24, 2017, 07:50:24 PM »
Hi all, so after letting all 3 batteries equalize half of yesterday and into this morning, connected in parallel, these are the results.
Original starting rest voltage of each battery:
A = 12.50 volts
B = 12.52 volts
C = 12.495 volts
Total = 37.515 volts
Present resting voltage after around 90 watt/hours extracted:
A = 12.52 volts
B = 12.52 volts
C  = 12.55 volts
Total = 37.59 volts
Will continue the experiment.
peace love light

Free Energy | searching for free energy and discussing free energy

Re: Oscillator Powering 6 Modified Led bulbs
« Reply #74 on: May 24, 2017, 07:50:24 PM »

 

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