Oscillator Powering 6 Modified Led bulbs

[magnetman12003]

Hi all, was posting about this particular oscillator light in another thread, felt it was good enough for its own thread.
It's the basic joule thief style circuit, using gutted 12 volt led bulbs rated at 7 watts from ebay.
The bulbs did contain a boost circuit inside them, to boost from 12 volts to around 21-24 volts dc, of course i removed that circuit from each bulb, for added efficiency.
The setup really is putting out a very good amount of light.
I was previously using a small number of turns on the ferrite c-core, then used many more coil layers and increased efficiency even further.
When looking at a Phillips 40 watt equivalent led bulb in a nearby can light, it is not much brighter than one of the 6000k pure white led bulbs.

Question:  How bright is your neon bulb when you are powering the bulbs you used in your 12 volt circuit?
I just finished replicating your 12 volt circuit with some modifications.  Have not tested it yet but my neon bulb lights up with the circuit not connected to any bulbs.  Just powered by a 12 volt battery.  More to come....
Here is a drawing and some pics.
peace love light

[SkyWatcher123]

Hi magnetman, without a load off the flyback diode, the neon will probably always light up.
If i recall correctly, a single neon did not light up with the 12 volt 7 watt modified led bulbs as load.
peace love light

[magnetman12003]

Hi magnetman, without a load off the flyback diode, the neon will probably always light up.
If i recall correctly, a single neon did not light up with the 12 volt 7 watt modified led bulbs as load.
peace love light

I just competed testing my replication of your 12 volt setup. I used a single unmodified 12 volt five watt led bulb to see what happens. Connected directly to a 12 volt battery the bulb burns with a 379 candlepower rating.  When I place my replication of your 12 volt setup between the battery and bulb the neon light goes out and at first the bulb burned with a 1300 candle power rating and that lasted for 3 minutes. Until the insides of the bulb electronic package failed and it quit burning.  Now I am wandering if 9 seven watt led bulbs might go out the same way.

[SkyWatcher123]

Hi magnetman, sorry that your bulb fried and i know the reason why.
I tested mine as modified bulbs, meaning, if you leave the inner circuitry, that circuit will see far more than the 12 volts the bulb is rated for.
Because my circuit is a boost converter and the buffer capacitor is going to be above 12 volts and thus pushing too much current through the bulbs inner circuitry.
My 12 volt led bulbs, modified led circuit board forward voltage is around 20-24 volts, which then makes it safe for that circuit.
It would be ok, to power your 12 volt bulbs, non-modified, using my circuit, if you ran the diode to positive of capacitor and then the negative of capacitor, to the positive of your power supply, then place your led bulb in parallel with capacitor, though not sure how efficient that might be.
In that configuration, we avoid the direct 12 volts coming from your power supply and the current flow potential that creates.
peace love light

[magnetman12003]

Hi magnetman, sorry that your bulb fried and i know the reason why.
I tested mine as modified bulbs, meaning, if you leave the inner circuitry, that circuit will see far more than the 12 volts the bulb is rated for.
Because my circuit is a boost converter and the buffer capacitor is going to be above 12 volts and thus pushing too much current through the bulbs inner circuitry.
My 12 volt led bulbs, modified led circuit board forward voltage is around 20-24 volts, which then makes it safe for that circuit.
It would be ok, to power your 12 volt bulbs, non-modified, using my circuit, if you ran the diode to positive of capacitor and then the negative of capacitor, to the positive of your power supply, then place your led bulb in parallel with capacitor, though not sure how efficient that might be.
In that configuration, we avoid the direct 12 volts coming from your power supply and the current flow potential that creates.
peace love light

I found that my modified replication output is 354.7 volts dc.  So using three 115 volt led bulbs in series and unmodified should work.  I am going to try it.   354.7  divided by 115 is 3.08   I know the bulbs are AC but the DC output is composed of spiked energy.  I just tried it with one 115 volt 10 watt led bulb and the bulb rapidly pulsed very-very  brightly and did not burn out.  It was unmodified.  Next I am going to power 3  ten watt 115 volt led bulbs in series with my very large 360 watt 12 volt power supply ( Not my 1.2 amp hour 12 volt battery ) and see if the pulsing stops. I think more current is needed to keep the setup capacitor fully loaded all the time so the bulbs won't pulse.