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Author Topic: Mosfet Capacitor Dump Experiments  (Read 6642 times)

SkyWatcher123

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Re: Mosfet Capacitor Dump Experiments
« Reply #30 on: March 05, 2023, 12:47:10 AM »
Hi all, after listening to joellagace, speak about the importance of short on times and
you are absolutely correct joell, this needs to be focused on, to gain greater efficiency.


I tried another 555 timer to pulse the coil, though it seemed to be interfering with the
other 555 timer for the capacitor dump circuit.


So i went with the Stingo circuit, which always gives the lowest possible on time pulse
and gives a very sharp and abrupt pulse as well.
NPN combo. The Stingo circuit is charging the dump capacitor to similar voltages, using far less input power and is not interfering with the 555 timer cap dump circuit.
I see no issue, charging a large battery with this setup, even at power levels as you have shown joellagace, i think you said 9 volts at 60 milliamps or .54 watts.
At the moment, with the components selected, this oscillator is using 1.7 watts, though it is really hammering this old 12 volt lawn mower battery, so i figure, at a 1/2 watt input, it would still charge just fine and maybe give extra charging effects.
Experiments shall continue.
All comments of a constructive nature welcome
peace love light :)

joellagace

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Re: Mosfet Capacitor Dump Experiments
« Reply #31 on: March 05, 2023, 12:55:44 AM »
I'm glad the information I shared has been useful to some, I will soon resume the cap dump methods, I really think this is one method to explore in better details. And your right some people have reported to me in private, on here in public and as comments on some of my videos some good results with the concepts as well.

SkyWatcher123

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Re: Mosfet Capacitor Dump Experiments
« Reply #32 on: March 06, 2023, 06:30:09 PM »
Hi all, Hi joellagace, yes, the capacitor dump method seems very effective and is needed for these coil collapse discharge methods, otherwise, the battery cannot power normal loads properly.
I found some category 5e ethernet cable in the attic, which has 8 individual solid core 24awg. insulated wires inside.
So i connected all 8 wires as you have done and the coil sits at .9 ohms, which is ideal for the stingo oscillator i have heard.
I think the ethernet cable is around 200-250 feet in length, though not sure.
This setup seems very efficient at the moment.
Picking up a new 12 volt, liquid electrolyte lead acid battery today for further experimenting, as the other lawn mower batteries i had, were too damaged.
This setup is charging a 470uF low esr capacitor for the cap dump circuit at around 40 volts per discharge.
Will be posting the new circuit sometime today, after i finish drawing it and include a picture of the setup so far.
peace love light

Thaelin

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Re: Mosfet Capacitor Dump Experiments
« Reply #33 on: March 06, 2023, 07:50:49 PM »
For those peeps that decide to use flooded wet cell lawn tractor batts to run test with, they are inferior junk to start with. Not meant to be used hard. They fall apart in the inside easy. I went through 8 of them before I realized the problem. Go with reliable wet cell types such as golf cart style. They are made for rugged use. Also, batts for semi truck use are well suited too.

SkyWatcher123

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Re: Mosfet Capacitor Dump Experiments
« Reply #34 on: March 06, 2023, 09:30:55 PM »
Hi all, Hi Thaelin, all i have access to at the moment, will not be pulling a
load beyond C/20 rating and not draining it very deep, so should make it last longer.
Hi folks, here is the full circuitry I am using at the moment.
Comments welcome
peace love light

https://postimg.cc/bZNRJ4bP

dsquared18

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Re: Mosfet Capacitor Dump Experiments
« Reply #35 on: June 24, 2023, 06:30:40 PM »
Hi Sky,

Been a while since but thanks for this schematic.

Have you had success with it?

Cheers,
D2