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Author Topic: 12V 60A car battery , maybe dead?  (Read 196311 times)

Offline Mars67

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Re: 12V 60A car battery , maybe dead?
« Reply #150 on: February 03, 2015, 07:04:47 PM »
The power supply delivers 12.06V DC. The two large resistors are 100 Ohm 5W connected in parrallel. I checked the value and get 49.5 Ohms. The pot is exactly 500 Ohms.

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Re: 12V 60A car battery , maybe dead?
« Reply #150 on: February 03, 2015, 07:04:47 PM »

Offline Groundloop

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Re: 12V 60A car battery , maybe dead?
« Reply #151 on: February 03, 2015, 07:13:52 PM »
Hi Groundloop

Thanks yet again for your input. I am not sure about the connection of the pot as indicated on your circuit diagram. Again please excuse my ignorance. The pot has three connectors. The sweeper is in the middle. At the moment the 50 Ohm Resistor (2 x 100 Ohm 5W resistors connected in parallel) is connected in serial from the one connector on the side of the pot to the sweeper. The sweeper is then connected to L2. Should the two outside connectors i.e. the full 500 Ohms be in serial with the 50 Ohm with the sweeper going to L2? I will measure all the values and get back to you this evening.

Mars67,

The attached drawing may help you to verify that you have everything connected correct.

What is the type marking on your voltage regulator?

GL.

Offline Mars67

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Re: 12V 60A car battery , maybe dead?
« Reply #152 on: February 04, 2015, 06:10:15 AM »
Hi GL

Thanks for the schematic. I connected the pot correctly.
The Voltage Regulator is an ST L7809CV (L7809CV GK1AA v6 CHN308)
The Transistor is an BU208A made by ISC
The Cap is rated at 220nF 260V
I could not find the BYV29-500 so was given U1560 Diodes in stead (NFE16G U1560). I did manage to get BYV29-300s but did not try them in the circuit yet.

Your assistance and information is greatly appreciated.

Free Energy | searching for free energy and discussing free energy

Re: 12V 60A car battery , maybe dead?
« Reply #152 on: February 04, 2015, 06:10:15 AM »
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Offline Groundloop

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Re: 12V 60A car battery , maybe dead?
« Reply #153 on: February 04, 2015, 06:29:32 AM »
Hi GL

Thanks for the schematic. I connected the pot correctly.
The Voltage Regulator is an ST L7809CV (L7809CV GK1AA v6 CHN308)
The Transistor is an BU208A made by ISC
The Cap is rated at 220nF 260V
I could not find the BYV29-500 so was given U1560 Diodes in stead (NFE16G U1560). I did manage to get BYV29-300s.

Your assistance and information is greatly appreciated.

Mars67,

I did download the data sheet for the L7809CV voltage regulator and it's a 1,5 Ampere rated type.
So the regulator will be warm at the current you are using in the circuit. It was right of you to put
the regulator onto a heat sink. The transistor and diodes you are using is alright for the circuit.

There is one test you can do to see if we get rid of the pot-meter heating:

Connect your 12 Volt test bulbs at the output and reverse the wires on the L1 coil.
See if the circuit runs with the L1 coil wires reversed. If the circuit runs and you get
light in the bulbs, try to notice if the circuit current usage went down with the L1
wires swapped. If the circuit does not run then just put the wires back as they where.

GL.

Offline Mars67

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Re: 12V 60A car battery , maybe dead?
« Reply #154 on: February 04, 2015, 06:38:54 AM »
Thanks GL

I will test it this evening when I get home. When I had the circuit built on the bread board it did not run with the L1 wires reversed but will test it anyway on the circuit as built.

Could the way the coils were wound have anything to do with it?

Free Energy | searching for free energy and discussing free energy

Re: 12V 60A car battery , maybe dead?
« Reply #154 on: February 04, 2015, 06:38:54 AM »
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Offline Groundloop

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Re: 12V 60A car battery , maybe dead?
« Reply #155 on: February 04, 2015, 06:54:27 AM »
Thanks GL

I will test it this evening when I get home. When I had the circuit built on the bread board it did not run with the L1 wires reversed but will test it anyway on the circuit as built.

Could the way the coils were wound have anything to do with it?

Mars67,

Your coil is very good and professorial made so I do not think there is any problems there.

You should see if you can afford a o-scope. Even a used and older o-scope will do fine for
basic electronics like this. A o-scope will show you the waveforms in the circuit.

GL.

Offline Mars67

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Re: 12V 60A car battery , maybe dead?
« Reply #156 on: February 04, 2015, 01:57:21 PM »
I agree. You can't fix what you can't measure. What Frequency range would be adequate? 10Mhz?
« Last Edit: February 04, 2015, 05:01:50 PM by Mars67 »

Free Energy | searching for free energy and discussing free energy

Re: 12V 60A car battery , maybe dead?
« Reply #156 on: February 04, 2015, 01:57:21 PM »
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Offline Groundloop

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Re: 12V 60A car battery , maybe dead?
« Reply #157 on: February 04, 2015, 09:19:36 PM »
I agree. You can't fix what you can't measure. What Frequency range would be adequate? 10Mhz?

Mars67,

Any o-scope will be better than none. I really can't recommend a type for you, but
if money is a concern then look at eBay and other web sites. There is also many
"made in China" digital o-scopes that can do a OK job at a reasonable prize.

Did you perform the swap L1 wire ends test?

GL.

Offline gotoluc

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Re: 12V 60A car battery , maybe dead?
« Reply #158 on: February 04, 2015, 10:01:23 PM »
Best scope I've used for the money. $148. with delivery

http://www.ebay.com/itm/121446312238

Luc

Free Energy | searching for free energy and discussing free energy

Re: 12V 60A car battery , maybe dead?
« Reply #158 on: February 04, 2015, 10:01:23 PM »
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Offline MarkE

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Re: 12V 60A car battery , maybe dead?
« Reply #159 on: February 04, 2015, 10:35:55 PM »
Best scope I've used for the money. $148. with delivery

http://www.ebay.com/itm/121446312238

Luc
I recommend spending the extra $20. - $25. and getting the newer model 6052BE with higher bandwidth, faster sample rate, and deeper memory: 

http://www.ebay.com/itm/Hantek-PC-Based-USB-Digital-Storage-Oscilloscope-6052BE-50Mhz-Bandwidth-/221271002722?pt=BI_Oscilloscopes&hash=item3384c78e62

Offline gotoluc

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Re: 12V 60A car battery , maybe dead?
« Reply #160 on: February 04, 2015, 11:45:23 PM »
Good points MarkE

You can get the 6052BE for $5. less from this seller: http://www.ebay.com/itm/281368543872

Luc

Free Energy | searching for free energy and discussing free energy

Re: 12V 60A car battery , maybe dead?
« Reply #160 on: February 04, 2015, 11:45:23 PM »
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Offline MarkE

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Re: 12V 60A car battery , maybe dead?
« Reply #161 on: February 05, 2015, 12:10:06 AM »
$5. will buy another cheapy probe.

BTW, there is a big difference between the cheapy probes that come with these scopes, are sold on Ebay for under $10. and a $50. probe from ProbeMaster in San Diego.  The cheapy probes use copper core coax that has a low uniform impedance which is actually bad.  The $50. and up expensive probes from ProbeMaster, Tek, Keysight, LeCroy, etc use a fine nichrome resistance wire core.  Where the cores make a big difference is in the probe response to a fast rising edge.  The cheapy probes ring badly whereas the $50. probes do not.  For a 1m cable, the first 15ns - 50ns of a pulse is highly distorted by the probe.  If your signals do not rise faster than about 30ns (~10MHz sinewave) this is not a problem. 

Offline gotoluc

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Re: 12V 60A car battery , maybe dead?
« Reply #162 on: February 05, 2015, 12:59:53 AM »
More valid points!

Good things most of the stuff we do here is below 10Mhz

Thanks for sharing these good points

Luc

Offline Mars67

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Re: 12V 60A car battery , maybe dead?
« Reply #163 on: February 05, 2015, 06:30:06 AM »
Thanks for the great advice guys. I live in South Africa so it is a challenge to buy stuff off e-bay as many suppliers don't ship here and our postal services are so bad that you are very likely to lose any items of perceived value.

As far as the circuit is concerned I reversed L1 and it does not work. I wonder if the layout of my circuit could have anything to do with the heat issues?

Offline gotoluc

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Re: 12V 60A car battery , maybe dead?
« Reply #164 on: February 05, 2015, 07:35:31 AM »
I stayed in Durban, South Africa for 6 months 2 years ago and ordered some electronics from China through eBay and had no problems.
Try to buy it, the worse that would happen is they would send you your money back. Make sure to use paypal to get payment protection.
So many sellers sell this scope, you should find someone that will ship to South Africa.

Luc

 

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