Split Positive Boost Charger

[SkyWatcher]

Hi folks, Hi citfta, thanks for sharing the video, looks like they are having fun.
I'm steering clear of pusher props, they tend to be noisy and we fly in small grass fields with houses, so stealth is important for keeping the peace.
This is a light hearted thread, besides, i'm contemplating what testing to do next, with the parts i have available at the moment.
peace love light

[SkyWatcher]

Hi folks, i picked up a couple more flooded 12 volt tractor batteries today, so i now have the 3 to make some better experiments, just have to order a boost converter next.
In meantime, i will start tests with these.
Any comments, suggestions, questions or tips are welcome.
peace love light

[SkyWatcher]

Hi folks, i deleted my last post with circuit because that charger had continuity between negatives and was not ideal, though with a regular boost converter, without that continuity, could be interesting.
So i have been making some tests, using inverter splitting positives with 120vac dimmer and led bulb inline with transformer, then full wave bridge into charge battery.
Again, this way, we can have a regular led bulb splitting positives again, into each successive charge battery position.
I am also rotating the batteries and observing overall voltage to calculate what the batteries are losing or gaining.
So first phase is A+B = 24 volt series primary in parallel with C as charge battery.
2nd phase is A+C = 24 volt series primary in parallel with B as charge battery.
3rd phase is B+C = 24 volt series primary in parallel with A as charge battery.
Then we repeat this cycle and see what we see.
peace love light

[SkyWatcher]

Hi folks, here is the circuit i am using at the moment.
peace love light

[SkyWatcher]

Hi folks, i built a homemade boost converter, using a TV ferrite flyback core, 24 awg. wire, diode output off collector of transistor.
It seems to work good, the joule thief boost circuit is between the positives of the primary 24 volt batteries and the 12 volt charge battery.
I am using a 12 volt-4 watt yard bulb in-line with the positive diode output as load, then connected to positive of 12 volt charge battery.
Will be making some tests with this.
peace love light

Edit: after testing this circuit for a bit, it seems very efficient.
Though if one wished to power bigger loads with it, i would need to use thicker gauge magnet wire and far less turns than i have on it now, it was from a previous experiment.

[SkyWatcher]

Hi all, just wanted to post this circuit again, as i removed it before and have come to realize that it works well only for connecting the input to the charge battery and then connecting output of charger to primary batteries, to keep the system running.
I actually use an inverter splitting the positives, instead of the 12 volt yard bulb.
However, at least with this charger, it cannot be placed in a split positive position, though i haven't given it much thought, if diodes could be placed to prevent any short circuiting.
Though as far as matts latest video, it serves the same function, feeding back energy into the primary batteries, to prevent the charge battery from rising out of balance, relative to the primary batts.
peace love light

[SkyWatcher]

Hi all. just ordered this boost converter, when it arrives, we shall see how it works.
peace love light

DC-DC 600W 10-60V to 12-80V Boost Converter Step-up Module Power Supply Sale - Banggood.com

[SkyWatcher]

Hi all, i have been playing with this new boost converter and trying different circuits.
This circuit is very interesting, it sure is giving interesting results, especially when the output voltage of booster is tweaked just right.
Has anyone tried this circuit yet?
peace love light

[BroMikey]

Hi all, i have been playing with this new boost converter and trying different circuits.
This circuit is very interesting, it sure is giving interesting results, especially when the output voltage of booster is tweaked just right.
Has anyone tried this circuit yet?
peace love light

No, what does it do, I might try it? Does it keep one battery higher
than the other?

.25? .5?

[SkyWatcher]

Hi mike, me up too late, it is only one 12 volt battery and a capacitor on the left.
I'm using a 28,000uf-40 volt capacitor.
When the booster is tuned just low enough to keep the inverter going with a 6 watt led bulb, the battery holds voltage much higher and longer, compared to powering it directly.
That's what i'm seeing and it seems promising.
peace love light

[BroMikey]

Hi mike, me up too late, it is only one 12 volt battery and a capacitor on the left.
I'm using a 28,000uf-40 volt capacitor.
When the booster is tuned just low enough to keep the inverter going with a 6 watt led bulb, the battery holds voltage much higher and longer, compared to powering it directly.
That's what i'm seeing and it seems promising.
peace love light

Okay sounds good like a potential difference might be the culprit here
I have many cap backs over here so maybe I can see this for myself.
Yeah i am always up late and working til 1 AM then I eat dinner

Been doing that since the late 70's.

As you know caps cause voltage to increase when for instance with a
rectifier then in this case the oscillations from the inverter AND convert might
offer more to a cap than a battery can realize not being fast enough.

Happy experimenting. I'll be giving it a go.

I just got another tiny inverter in the mail today draws 200ma on idle.

[SkyWatcher]

Hi mike, i looked at my post from last night and it may be misleading.
The voltage on the single battery is not higher than starting voltage, though under load, it does maintain higher voltage and for longer periods, than compared to inverter directly powered from 12 volt battery.
So the battery is getting return charge, how healthy it is for the battery, i do not know.
I also tried just going from the capacitor to another 12 volt battery, with inverter splitting positives and that works also, that charges the heck out of the second charge battery.
peace love light

[ewizard]

Skywatcher - not sure if you have ordered from banggood.com (LOL what a site name) but my experience was they take a very long time shipping. I think it was almost 8 weeks before I got a very small item. Not sure if they are always slow but I did see others complaining about shipping times. Compared to other China shippers they were one of the slowest I've dealt with. The good though is they are often the cheapest if you have patience

[SkyWatcher]

Hi ewizard, it took about 3 weeks from china, i should have paid the couple bucks more, would have been here in a week.
It's ok though, gave me time to try other experiments.
peace love light

[SkyWatcher]

Hi folks, this particular circuit is working well so far.
I wanted more efficiency than the cen-tech inverter, so the re-emf charger circuit in combination with the split positive booster, should power this gutted led bulb and get extended run times.
The re-emf circuit which is splitting the negative, between the 24 volt booster output and the 12 volt charge battery, should compensate for the fact that the gutted led bulb, is stealing some charging potential from the oscillator, via the secondary coil.
Let me know what you folks think.
peace love light