3.7 VOLT BATTERY POWERS 56 WATTS

[SkyWatcher123]

Hi all, hi magnetman, i received the order with the 10 led bulbs, which are 7 watt bulbs, i noticed one so far is not working, so i decided to open it up and see what's inside and what the problem is.
The wire came loose from the base of the bulb, easy fix.
Now this is very interesting, it looks like it might be some kind of boost circuit inside, to take the 12 volts and transform it probably to 120 volts.
It may be the same led board they use for 120 volt bulbs.
Notice the chip under the capacitor and the inductor and full wave bridge.
I tried the bulb on my 12 volt battery and it powers the bulb no matter the polarity, from the battery.
When powering direct from my 12 volt tractor battery, the bulb draws .53 amps at 12.29 volts or 6.5 watts and is very bright.
I tested 4 bulbs in parallel with my circuit as it is and it draws .5 amps at 4.93 volts or 2.47 watts, using the 5 volt-2.4 amp, usb power supply.
The bulbs are not very bright, though with some tweaking, i'm sure i can bring them to good brightness.
Though, considering these bulbs have a boost circuit inside, magnetmans SCR dumping method may be the way to go, we shall see.
peace love light

[SkyWatcher123]

Update: i just tested one of the 12 volt led bulbs and it lights using a directly driven single lithium ion cell and draws .55 amps at 3.84 volts or 2.1 watts and brightness is pretty good.
peace love light

Edit: Also tested using the usb power supply and with the 4 parallel led bulbs driven directly from the usb supply, it draws 1.34 amps at 4.14 volts or 5.55 watts and brightness is very good.
Whole room is lighted nicely, though i have no doubt magnetmans setup does better.

[broli]

Build a few replicas and send them out to a few trusted people with good equipment. The community will cover all the costs.

[magnetman12003]

Update: i just tested one of the 12 volt led bulbs and it lights using a directly driven single lithium ion cell and draws .55 amps at 3.84 volts or 2.1 watts and brightness is pretty good.
peace love light

Edit: Also tested using the usb power supply and with the 4 parallel led bulbs driven directly from the usb supply, it draws 1.34 amps at 4.14 volts or 5.55 watts and brightness is very good.
Whole room is lighted nicely, though i have no doubt magnetmans setup does better.

Hi SkyWatcher,
When you find time connect 9 of your bulbs in parallel and using your USB wall adapter ONLY as a power source find the USB DC output voltage and current it takes to light your bulbs.

I have found using my wall type USB adapter powering the ""NINE"" bulbs ""THROUGH THE SETUP"" there is 3.30 DC volts across the C1 Capacitor at 1.26 DC amps.  Totals 4.158 watts.  I Would love to see what difference there is between a straight shot to your USB adapter versus a shot through my USB adapter AND SETUP terminating across the C1 capacitor.

[SkyWatcher123]

Hi all, so what i'm saying in my previous post is, based upon magnetmans circuit, 5 volts input is direct driving his led bulbs, through his full wave bridge in his circuit and also because of the boost circuitry inside the bulb.
Though i would assume his capacitor dumping circuit may also be contributing power to the bulbs, which may explain why the light output is so smooth and not blinking, because the capacitor dump pulses are riding on top of the output from the directly driven input
I tried two nimh cells in series for around 2.56 volts and that voltage does not light up the led bulbs, directly driven, though 3 of those cells in series does.
I also tried driving the led board direct, which means bypassing the led bulbs driver circuitry and with a 12 volt battery and it does not light up, it seems it is a board rated for 120 volts.
Hi broli, not sure who you are speaking to.
peace love light

Edit: just noticed your post magnetman, the voltage i gave for the 4 bulbs directly off usb, was directly at output of usb, not at the capacitor.
I just connected the capacitor output from my circuit, directly to the led board and the capacitor is showing 21 volts using the 5 volt usb input, at good brightness.
This tells me, the led board is not rated for 120 volts.
The board has 14 leds and if it is like other boards i see online, it may have 2 rows of 7 leds in series and these are both in parallel.
And if each led uses 3 volts or so to turn on, then 21 volts makes sense.
It is drawing .52 amps at 4.9 volts or 2.55 watts from usb supply.