12V 60A car battery , maybe dead?

[Mars67]

Hi.

I've realised that it is a 50 Ohm 5W resistor. I have a 56 Ohm 5W resistor. What will the impact be on the output of the circuit?

Thanks

[Groundloop]

Hi Groundloop

Thank you for the circuit and all the information you have been providing. I am in the process of getting the necessary parts to build this charger with the air-core coils. I have some larger batteries that I want to try and condition. As I am quite a newbie I have a few silly questions to ask if you will pardon my ignorance.

1. On the first circuit you posted I assume that the 220nF Cap must be 1000v too?
2. I do not have access to an oscilloscope so was wondering if there is a way to ensure that one connects the coils the correct way around from the onset.
3. What is the resistance of the 50R 5W resistor. 5 Ohms or 50 Ohms?
4. What would be the easiest way to twist the three 18 gauge wires together?
5. How do I know to what value to set the pot initially?
6. Will a 9v 1A DC power supply be sufficient for the circuit?
7. Out of curiosity. What causes the circuit to self oscillate?

Thank you

Mars67,

1. The voltage rating on the 220nF capacitor must be large enough to tolerate the bias input plus the trigger coil pulses.
    You can use almost any type of non-polarized capacitor here. A 100 Volt capacitor will do fine.

2. You can build the circuit, and then connect a 12 Volt 10 Watt car lamp to the output. If the circuit is oscillating then
    the car lamp will light. If not, then swap the ends of the trigger coil (L1).

3. The 50R resistor is 50  Ohm. You can also use a 47  Ohm 5 Watt resistor here.

4. There is one easy way to twist the wires together. You can make a disk out of laminated wood and drill three holes in the disk.
    In the center of the disk you drill one hole for a 6mm bolt. You then cut your three enameled copper wire to length, thread the
    wires through the disk and fasten the wires to a three or door knob or something. You then spin the disk with a drill and walk
    backwards away from the door knob etc. Now the three wires will gradually be twisted together.

5. Set the pot to its highest resistance at first start up.

6. 9 Volt 1 Ampere will run the circuit. But if you turn the pot-meter resistance too much down, then the power supply may get warm.

7. The circuit will oscillate because you use a active element with amplification, a transistor, and coils.
    Read more about oscillators here: https://en.wikipedia.org/wiki/Electronic_oscillator

GL.

[Groundloop]

Hi.

I've realised that it is a 50 Ohm 5W resistor. I have a 56 Ohm 5W resistor. What will the impact be on the output of the circuit?

Thanks

Mars67,

You can use your 56  Ohm resistor. The impact on the circuit will be almost none.
(Actually a little lower bias current to the transistor on low pot-meter setting, but not important.)

GL.

[Mars67]

Hey Groundloop
Thank you for your prompt response and the good information as usual. I have ordered 18 Gauge wire and am waiting for the supplier to get stock. As soon as I have that I will start the build.

It is funny how one can know something about electronics and yet not know anything about something as fundamental as ocscillators. Thanks for the link. Another puzzle piece fell into place for me.

I am very curious to see the outcome.

[Groundloop]

Hey Groundloop
Thank you for your prompt response and the good information as usual. I have ordered 18 Gauge wire and am waiting for the supplier to get stock. As soon as I have that I will start the build.

It is funny how one can know something about electronics and yet not know anything about something as fundamental as ocscillators. Thanks for the link. Another puzzle piece fell into place for me.

I am very curious to see the outcome.

Mars67,

Regarding point 4 in my above post. You also need to have three wood pegs on the plate that
holds three bobbins for the three copper wires, so that the copper wire can be feed from the
bobbins as the plate is rotated. Attached is a simple drawing that may show my idea. So while
you are waiting for parts then maybe you can build the coil winder disk?

GL.