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Offline xavier
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« Reply #810 on: March 10, 2015, 02:23:57 pm »
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The only thing that you will need to work on is your coils configuration ie the inductance, wire gauge, diameter and the damping resistor. I cant tell you if what you have done is correct or not, it would be like asking me to read a book that I can't open. You need an oscilloscope to be able to see what is happening on the receiving side of the coil to able to optimize it.   

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So many questions so little time

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« Reply #811 on: March 10, 2015, 03:37:39 pm »
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many thanks xavier i always appreciate your help

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« Reply #812 on: March 27, 2015, 05:27:25 pm »
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hi for all .please i need your help .i want to make a coil 42cm diameter .what would be the number of turns,?and what about damping resistor(680ohm-)?do change it ?thank you

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« Reply #813 on: April 05, 2015, 02:46:22 pm »
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hi for all .I built my first coil 42cm diameter 35turns 0.7mm .damping resistor:680ohm 1watt  frequency 300hz.result:very poor detection .i detect a piece of  copper 25×10cm at 35cm .please help me to get a good detection .thank you advanced

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« Reply #814 on: April 05, 2015, 02:55:07 pm »
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   Use the coil Calculator.    30 some turns sounds like to much for that size.   The Damping resister needs to be set for any coil change.

   Have a look see here:  

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« Last Edit: April 05, 2015, 02:55:52 pm by homefire »
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« Reply #815 on: April 05, 2015, 05:11:25 pm »
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many thanks to you. i don't understand : 30 some turns sounds like to much for that size.please Can you explain more?thank you again



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« Reply #816 on: April 05, 2015, 06:49:02 pm »
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There should probably only be about 12 turns if not less on such a coil, go to the link that Homefire gave you, there you will find all the information.

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« Reply #817 on: April 06, 2015, 03:13:23 am »
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many thanks xavier

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« Reply #818 on: April 06, 2015, 05:28:20 am »
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what inductance and res is good for coil to use for delta pulse?

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« Reply #819 on: April 16, 2015, 10:32:01 am »
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hi for all .please help me .i have a battery12v.7ampere. can i use it for my dp2? 7ampere possible damage it?thank you advanced

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