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Author Topic: Efficient Boost Oscillator Led Lamp  (Read 3772 times)

Offline SkyWatcher123

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Efficient Boost Oscillator Led Lamp
« on: December 14, 2018, 06:35:27 AM »
Hi all, I needed another lamp with low level light output and found this type of circuit.
I like it because it is fairly simple and doesn't need a bifilar coil, just a single strand coil.
It also gives good light output, even when only using 230 milliwatt input.
It is using a gutted 120 volt 6 watt led bulb that lights at around 50 volts on up.
The ferrite flyback c-core is salvaged from a crt TV and the gap in the c-core is set at the most efficient placement.
Let me know if you try this circuit.
peace love light :)
https://ibb.co/RQLSkTh

Free Energy | searching for free energy and discussing free energy

Efficient Boost Oscillator Led Lamp
« on: December 14, 2018, 06:35:27 AM »

Offline SkyWatcher123

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Re: Efficient Boost Oscillator Led Lamp
« Reply #1 on: December 19, 2018, 08:30:26 AM »
Hi all, I have tested version 2.0 of this led lamp, this version is even more efficient than previous version.
At only 10 milliamps or 127 milliwatts input, the led light output is highly usable and the lamp fixture is even at ceiling height.
The coil is many layers of bifilar 24awg. magnet wire.
I think the good efficiency in this secondary coil style arrangement, is because the coil coupling is very strong, since each strand is right beside each other, plus the closed ferrite c-core.
Your thoughts welcome and let me know if you test this version 2.0.
peace love light
https://ibb.co/pf75Yhf

Offline erfandl

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Re: Efficient Boost Oscillator Led Lamp
« Reply #2 on: December 19, 2018, 06:20:37 PM »
Hi all, I have tested version 2.0 of this led lamp, this version is even more efficient than previous version.
At only 10 milliamps or 127 milliwatts input, the led light output is highly usable and the lamp fixture is even at ceiling height.
The coil is many layers of bifilar 24awg. magnet wire.
I think the good efficiency in this secondary coil style arrangement, is because the coil coupling is very strong, since each strand is right beside each other, plus the closed ferrite c-core.
Your thoughts welcome and let me know if you test this version 2.0.
peace love light
https://ibb.co/pf75Yhf
Hi skywatcher. I want to test it but I don't know how many turns of wire. can you tell me how many turns wire on the coil ? also if you can please help me in this post: https://overunity.com/17846/self-powered-generator-inventor-from-south-africa/msg527668/#msg527668

Free Energy | searching for free energy and discussing free energy

Re: Efficient Boost Oscillator Led Lamp
« Reply #2 on: December 19, 2018, 06:20:37 PM »
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Offline nul-points

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Re: Efficient Boost Oscillator Led Lamp
« Reply #3 on: December 19, 2018, 08:48:41 PM »
hi skywatcher

nice project - good progress with v2

i bet there's still a bit more energy chewing at the door, waiting to be let loose

if you haven't already tried this, how about checking out a full-wave diode bridge between the secondary and the buffer capacitor, instead of the single-diode half-bridge you have at the moment?

you could compare 2 types of FW bridge:-
 - the 4 diode version (downside is '2 diodes in series' voltage loss)
 - 2 diodes, centre-tapped secondary version (downside is double length secondary winding)
(if it's not too much hassle having to rewind the secondary, you might well improve the efficiency of the circuit by 10-20%)

its also worth just trying a different turns ratio (just changing the secondary windings +/-)  to see if you're anywhere near the optimal loading for the lamp output circuit

btw.  do you know if the output is due to the main switch-on pulse, or to the flyback action? (ie. is the secondary in-phase or anti-phase?)

whatever you decide, let us know how you get on

np

Offline SkyWatcher123

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Re: Efficient Boost Oscillator Led Lamp
« Reply #4 on: December 20, 2018, 03:05:28 AM »
Hi all, thanks for the replies.Hi erfandl, with this solid state oscillator coil, at least 8 layers, with packing tape between each layer, the coil is 1-1/2 inches in length on the ferrite c-core.

As far as the south african device, I'm taking a break from that until I get more inspiration to experiment again with it, though I did observe just about 1 to 1 charging, when swapping at the right settings, meaning free mechanical.


Hi nul-points, thanks for the positive words.

To clear up any confusion, it is a bifilar coil, 2 strands wound side by side at the same time.
So I'm using the other strand as secondary, so it has the same number of turns.I did try a full wave bridge off the secondary, made of 4 - 1n4007's in parallel per rectifier branch, it seems more efficient with the single diode.

I also tried with just the gutted led bulb, without the ultrafast diode and cap, slightly better with the diode and cap.

The led bulb lights when transistor turns off.

I have been trying to tune the oscillator, by altering the capacitor off the collector and the other resistor values, it definitely has some sweet spots I can see.
Also, smaller, higher speed transistors may give better efficiency also, will have to try that also.peace love light :)

Free Energy | searching for free energy and discussing free energy

Re: Efficient Boost Oscillator Led Lamp
« Reply #4 on: December 20, 2018, 03:05:28 AM »
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Offline SkyWatcher123

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Re: Efficient Boost Oscillator Led Lamp
« Reply #5 on: December 20, 2018, 07:40:29 AM »
Hi all, I changed out both NPN transistors for smaller rated ones.

I used a BD135 NPN as the main drive transistor and a 2SD882 NPN for the other position.

The efficiency is better, getting a noticeable increase in light output at only 134 milliwatts input.

These smaller transistors have a higher gain, so that might also help and probably waste less power also.

Looking at the led bulb at ceiling height burns my eyes, so it is fairly useful light output.
peace love light :)

Offline nul-points

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Re: Efficient Boost Oscillator Led Lamp
« Reply #6 on: December 20, 2018, 10:45:45 AM »
hi skywatcher

good move on the transistor change, it can make quite a difference to use some with a lower ON voltage

ah ok, i wasn't sure how 'gutted' the LED lamp was

if you still have the utility connector end of the circuit in place then it should have its own rectification in place (and you might find you can really reduce the size of the output cap, make it non polarised, or even remove it altogether)

if you do need to use diodes you can reduce some losses by using Schottky diodes (sufficiently high current and low-leakage rating ones)


all the best
np

Free Energy | searching for free energy and discussing free energy

Re: Efficient Boost Oscillator Led Lamp
« Reply #6 on: December 20, 2018, 10:45:45 AM »
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Offline SkyWatcher123

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Re: Efficient Boost Oscillator Led Lamp
« Reply #7 on: December 20, 2018, 08:05:03 PM »
Hi nul-points, thanks for the positive reply and good suggestions.

The gutted led bulb is just the casing and the leds on the aluminum plate, no diodes on that existing board.
I'll look around here for some schottky diodes, I know i salvaged some.

Here are some pics of the setup.

peace love light  :)

https://ibb.co/T1HPJZt

https://ibb.co/0ZXhsdq

Offline nul-points

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Re: Efficient Boost Oscillator Led Lamp
« Reply #8 on: December 20, 2018, 09:52:32 PM »
hi skywatcher

that's a neat coil wind you've done there - wish mine looked as tidy as that!   :)

i would expect to find the drive electronics for the lamp inside the white casing between the LED heatsink and the lamp screw connector (but don't try to get inside at the moment)

if the circuit is still inside, your lamp should work regardless of which way round its 2 connections are connected across your buffer cap

if the lamp does work either way round then you should be able to remove the 200uF buffer cap (and then you can probably remove the diode too) - in which case you could try different value non-polarised caps across the lamp (in place of the 200uF) and see if you can tune the output at all to better match the output to the primary/switch side

(as i mentioned above, changing the turns ratio by secondary rewinds, might get to a better matched load, but trying various non-polarised caps** is going to be a whole lot less work!)  **check any new caps are rated well above the pk-to-pk volts across the lamp

just an idea

NB.  don't handle anything around the coil or lamp output side whilst ON or soon after switching off!


nice clean build btw!

all the best
np

Free Energy | searching for free energy and discussing free energy

Re: Efficient Boost Oscillator Led Lamp
« Reply #8 on: December 20, 2018, 09:52:32 PM »
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Offline SkyWatcher123

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Re: Efficient Boost Oscillator Led Lamp
« Reply #9 on: December 21, 2018, 03:58:43 AM »
Hi nul-points, thanks for the positive reply.
As the circuit drawing shows, the led bulb is definitely gutted of internal circuitry.
The non-polarized capacitor on secondary sounds like something to try, I will experiment with that.
peace love light

Offline nul-points

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Re: Efficient Boost Oscillator Led Lamp
« Reply #10 on: December 21, 2018, 07:15:16 AM »
hi skywatcher

ok, so you've completely removed everything from the internal circuitry except the LED plate, which can now be shown on a schematic as having a polarisation (ie. +/- leads) and probably some series/parallel connection of the LEDs to give some idea of the likely operating voltage

in which case, a buffer cap is likely still to be necessary, a non-polarised unlikely to be better, but there might be some scope for trying a different value buffer cap.  a Schottky diode might give a small benefit over a 1N4XXX type.  a FW bridge of Schottkys might give improvement over the single 1N4XXX type

in future experiments, its worth winding 2 same-length secondaries (ie. trifilar with the primary) cause then you have the choice of connecting the 2 'secondaries' in parallel (and used like your trafo here) or in series if you want to use a centre-tapped 2-diode FW bridge


hope this helps
np

Free Energy | searching for free energy and discussing free energy

Re: Efficient Boost Oscillator Led Lamp
« Reply #10 on: December 21, 2018, 07:15:16 AM »
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Offline SkyWatcher123

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Re: Efficient Boost Oscillator Led Lamp
« Reply #11 on: December 24, 2018, 05:34:55 AM »
Hi nul-points, thanks for all of your helpful sharing, I will keep those things in mind as I experiment.
I'm finding some interesting observations as I experiment with different lighting devices.
I decided to make a test of direct current with 555 timer pwm, powering a homemade led bulb, using 4 sets in parallel of 5 in series surface mount leds, ones salvaged from those T8 led flourescent replacement tubes.
I set the voltage so they were under voltaged, so as to boost efficiency.

Though they were bright, somehow they just did not have the same area or surface lighting, that I can achieve with the oscillator powered devices.
Plus, with the oscillators, I can seemingly use less power to achieve a better visual perception of lighted surface area.
I'm not sure why, though my tests seem to show this.

Maybe it's the fact that the 555 timer, at full open, gives full duty cycle, where as with the oscillator, it is always at a certain lower duty cycle, creating good surface area lighting while minimizing input power.
And I changed circuits at the moment, I'm using that large bifilar coil with ferrite c-core in the joule thief configuration.

Though not common grounded, the gutted led bulb across the capacitor, with diode off collector into 470uF electrolytic capacitor and other end of cap and coil to positive of primary coil, bedini style really.
At around 700 milliwatts, I'm getting the about the same or better area surface lighting level, by my eyes perception, that I was getting with the 555 timer, direct current pwm mode, though that was using around 1.4 watts input.
Definitely interesting results.

peace love light

Offline nul-points

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Re: Efficient Boost Oscillator Led Lamp
« Reply #12 on: December 24, 2018, 08:18:20 AM »
sounds good SW, enjoy your investigating - and enjoy the holidays, too!    all the best, np

 

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