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Offline MandaTopic starter
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« on: June 25, 2018, 02:23:28 am »
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Hi everyone,

I have build clone PI metal detector with atmega8 (

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http://asknotes.com/wp-content/uploads/2017/06/cpi_avr_volts.gif
), and it works fine, detecting coin on 20-25 centimeters. But when i try to test with diferent coil it stops to work fine. Actually it work, but detecting coin only on a few centimeters. I try to repair it, change microcontroler, irf740, 2n5551, some capatitors, but still is same. I dont have idea what is wrong. I hope that someone could hep me. Any sugestion or idea can help. I can post a picture with voltages that i have measured.

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Offline Homefire
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« Reply #1 on: June 26, 2018, 03:16:13 pm »
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   Does it still work with your first coil ?

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Offline MandaTopic starter
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« Reply #2 on: June 27, 2018, 02:50:49 am »
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No, now is the same with all coils. Detecting only on a few centimeters. Maybe, it happen because i change coils with detector powered on. Now i dont now what is burned or damaged. Later today i wil post circuit with measured voltage, if it help.

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Offline MandaTopic starter
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« Reply #3 on: June 27, 2018, 01:23:47 pm »
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This is a circuit diagram with measured voltages:

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« Reply #4 on: June 27, 2018, 07:16:04 pm »
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Here Ya Go !  Compare Notes. 

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http://asknotes.com/2017/02/16/testing-of-clone-pi-avr/


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« Reply #5 on: June 28, 2018, 07:44:50 pm »
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Homie. Ever get your's going? I don't even remember where i left the PCB  Grin

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« Reply #6 on: June 28, 2018, 10:39:53 pm »
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No.  That one's not even on my list to think about.   Grin

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