3.7 VOLT BATTERY POWERS 56 WATTS

[SkyWatcher123]

Hi all, Hi gyulasun, trying some different bulbs without any inner circuitry at all, gutted 4 Meijer led bulbs, 5.5 watt- 480 lumens.
With 4 hooked up in parallel, it is drawing 4.4 watts.
With this setup, the capacitor is at 96.8 volts and .03 amps are showing into the led bulbs.
This particular setup as is, is not as efficient as it could be, the neon across the transistor is brightly lighted when running, so energy is being wasted there.
Thinking a bigger capacity puffer capacitor may help absorb that energy and then into the led bulbs, have to try that yet.
I'm using gutted led bulbs now, because i can't find any like these older model ecosmart bulbs, seems most all the newer led bulbs, no matter brand, have circuitry inside that does not work well with this oscillator, blinks or is just not as efficient or bright.
I will try some things to make this setup more efficient, any ideas welcome.
peace love light

[magnetman12003]

Hi all, Hi gyulasun, trying some different bulbs without any inner circuitry at all, gutted 4 Meijer led bulbs, 5.5 watt- 480 lumens.
With 4 hooked up in parallel, it is drawing 4.4 watts.
With this setup, the capacitor is at 96.8 volts and .03 amps are showing into the led bulbs.
This particular setup as is, is not as efficient as it could be, the neon across the transistor is brightly lighted when running, so energy is being wasted there.
Thinking a bigger capacity puffer capacitor may help absorb that energy and then into the led bulbs, have to try that yet.
I'm using gutted led bulbs now, because i can't find any like these older model ecosmart bulbs, seems most all the newer led bulbs, no matter brand, have circuitry inside that does not work well with this oscillator, blinks or is just not as efficient or bright.
I will try some things to make this setup more efficient, any ideas welcome.
peace love light

I have found that with my setup the 8 bulbs burn as brightly using a 5 volt WALL USB ADAPTER as using 12 volts to power it.  This is as close to matching the USB adapter I have been using with no name on it.   https://www.amazon.com/gp/product/B0132X03ZS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

It appears I have been using an Apple wall USB-- looks like this:    http://www.ebay.com/itm/OEM-Apple-12W-USB-AC-Wall-Charger-Power-Adapter-for-iPhone-iPads-iPods-MD836LL-A/401292333396?_trksid=p2047675.c100009.m1982&_trkparms=aid%3D888007%26algo%3DDISC.MBE%26ao%3D1%26asc%3D40130%26meid%3D1c90c9992aee44898a5a0573a38ecfc6%26pid%3D100009%26rk%3D1%26rkt%3D2%26sd%3D321560573736#rwid

[SkyWatcher123]

Hi magnetman, thanks for the link, i went and picked up one up at frys tonight.
I may need to alter the setup to get similar light output at the 5 volt input, will be working on it.
If it works out good, i can get a 12 volt car usb charger and still use my 12 volt tractor batteries if the power goes out.
Here is link to the usb charger.
http://www.frys.com/product/8892912?site=sr:SEARCH:MAIN_RSLT_PG
peace love light

[SkyWatcher123]

Ok, i just tested the new 5 volt-2.4 amp usb charger on the circuit as is.
It is drawing 150 milliamps at 5.25 volts or .788 watts, the brightness is ok, not at the level it was before, so will have to make some alterations to the setup.
One thing that is interesting, the neon is still lighting up fairly bright across the transistor collector/emitter, even using this 5 volt input.
I wonder if my diodes are ok, or since i have so many turns on my coil, maybe i am getting some high voltage induction from the on phase of the input pulse, or i need to use a full wave bridge.
peace love light

[gyulasun]

Hi all, Hi gyulasun, trying some different bulbs without any inner circuitry at all, gutted 4 Meijer led bulbs, 5.5 watt- 480 lumens.
With 4 hooked up in parallel, it is drawing 4.4 watts.
With this setup, the capacitor is at 96.8 volts and .03 amps are showing into the led bulbs.
This particular setup as is, is not as efficient as it could be, the neon across the transistor is brightly lighted
when running, so energy is being wasted there.
Thinking a bigger capacity puffer capacitor may help absorb that energy and then into the led bulbs,
have to try that yet. I'm using gutted led bulbs now, because i can't find any like these older model
ecosmart bulbs, seems most all the newer led bulbs, no matter brand, have circuitry inside that
does not work well with this oscillator, blinks or is just not as efficient or bright.
I will try some things to make this setup more efficient, any ideas welcome.
peace love light

Hi Skywatcher,

Thank you for doing the measurements. Regarding your wish for doing improvement in efficiency,
I think one possibility is to use a power  MOSFET for the switch (instead of the bipolar transistor
like 2SC5359) and control the MOSFET by a CMOS 555 timer in a circuit that has variable frequency and
independent duty cycle adjustment means.
This way you can have more flexibility to find certain "sweet points" with respect to the ferrite
core-coil combination etc.
Naturally, you can stay with the 2SC5359 or similar types and still use a CMOS timer to drive it
and find better operation points.
If interested, here is a good circuit with variable freq and duty cycle control:
http://overunity.com/8411/steorn-demo-live-stream-in-dublin-december-15th-10-am/msg243175/#msg243175
( you can use the circuit to drive directly a bipolar transistor (and not a MOSFET as shown) with no change,
perhaps you may wish to use a 10 kOhm trimmer potmeter+ a series 1 kOhm instead of R1 to be able to
adjust the operating point of the bipolar transistor ).

Of course, when using this circuit, your present feedback coil to the base of the transistor should not be used
or alternatively you may do tests using the two windings in parallel in the collector (wire loss reduces)
or in series (coil L increases nearly 4 times) to check further duty cycle settings to reduce input power etc.

EDIT: if you find the ICM7555 hard to obtain (I think Mouser has it) than the pin compatible LMC555 or TLC555
types can also be used.  (They all work from as low as 2-3V up to 15-18 V supply voltages.)

Gyula