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Offline mojaTopic starter
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lorenz z1
« on: July 21, 2016, 10:58:02 pm »
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hi all
i have a problem with conection of pi 1.2,  i dont know what is gnd,tp.....
can somebody help me? Cry Pray

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« Reply #1 on: July 22, 2016, 06:31:03 am »
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Tp= test point for testing the detector
GND next to 12v its the negative from your battery
GND next to L1 is the other end of the coil
read this

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http://www.adrianandgenese.com/blogger/2012/07/13/how-to-build-a-surf-pi-1-2-pulse-induction-metal-detector-from-a-diy-kit/

its not the same layout board but all the info you need is there

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lorenz z1
« Reply #2 on: July 22, 2016, 07:23:48 am »
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thank you very much  Pray Kiss


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lorenz z1
« Reply #3 on: July 22, 2016, 01:29:04 pm »
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i built this pi but this pi has a little power for sense the metal and the speaker has lowly sound. what is the problem? Sad

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« Reply #4 on: July 22, 2016, 02:56:43 pm »
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   Big Question.   Could be a number of issues.  You need to go over it like your starting over and see what you see.  How did you build the coil ?

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« Reply #5 on: July 23, 2016, 07:20:29 am »
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the coil 50cm diameter and 1.4ohm


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« Reply #6 on: July 23, 2016, 08:00:56 am »
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  How much Inductance ?  Did you set the Damping Resistor or just plug in a resister. 

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« Reply #7 on: July 23, 2016, 11:04:55 am »
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  Did you do the Zero Volt adjustment ? 

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