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Author Topic: Oscillator Powering 6 Modified Led bulbs  (Read 62321 times)

Naija

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #60 on: May 10, 2017, 07:41:05 PM »
Thanks very much Gyula. Your explanation is well appreciated.

Naija

SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #61 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

magnetman12003

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #62 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.

Naija

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #63 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?

SkyWatcher123

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #64 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

casiano

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Re: Oscillator Powering 6 Modified Led bulbs
« Reply #65 on: May 21, 2017, 11:12:57 AM »
Hello SkyWatcher.
I replicated your circuit and it works very well,the only difference is i used a different cap and coil.
I used a 5v phone charger and 9 220v led bulbs in parallel.
The question is,why i am getting 280v output from the setup circuit?
And no matter how many led bulbs i add the power consumption is the same.

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.

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

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

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??

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

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


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!

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

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