PIM-2 Digital Metal Detector Project

[jap]

sometimes goes crazy or sometimes return to the usual noise without detect.

Hi hamma
When you say sometimes the mistake in a bad welding or bad connection in pcb,, please re welding to some points and check copper on the links of the pcb.
best time
j.

[hamma]

I worked in this direction, it is OK, sounds now become crazy all the time, I found that v_signial voltage is not stable at "atmega/23", so i followed the wrong signial on "D3 / 1,2, 3 "up to R41 and T8. I stop because I slam my VD7.

I changed the diode and back to work some time, after that the atmega is dead, and I test 5v on D1, sometimes it reaches 8v, which due grilled atmega.

I decided to replace d1, 2 c3, 2,5,6. it will suffice you think?

I'm waiting on Monday for the shops.

In my country the weekend lasts two and a half days

I eager to resume
thank you still, good Sunday

[jap]

after that the atmega is dead, and I test 5v on D1, sometimes it reaches 8v
I decided to replace d1, 2 c3, 2,5,6

Hi hamma
-OK
-re programming D2 IF not ,replace it.
best time
j.

[volcano]

Hi Jap
I made the project ( PIM-2 ) again, I use ATMEGA8A-PU
But I have not got a good result
So the question is : if I can use this ATMEGA8A-PU, and must I use ATMEGA8-16PI ?

thanks

[jap]

So the question is : if I can use this ATMEGA8A-PU, and must I use ATMEGA8-16PI ?

Hi volcano
--good for succeede for programming Atmega8.
-Any Atmega8-xxx worked.
-good result---> come from good coil,good pcb,good work.
-what the results?
best time
j.

[volcano]

thank you Jap
I have made very good PCB and I test all components ( voltage ok)
look, I said that I have Atmega8A PU, not Atmega8 there is the A at the last

Another thing,in the two PCB I have a Dropout ( the display chow 10 vdc only ) and when I measure it with multimeter I get it 10 vdc

[jap]

thank you Jap
I have made very good PCB and I test all components ( voltage ok)
look, I said that I have Atmega8A PU, not Atmega8 there is the A at the last

Another thing,in the two PCB I have a Dropout ( the display chow 10 vdc only ) and when I measure it with multimeter I get it 10 vdc

Hi volcano
-Atmega8A PU,,,I test it & work,,[A mean NEW].
-For Vbat change the values R3 from 15K to 22K, R4 from 10K to 12K.
best time
j.

[volcano]

thank you Jap

but I use R3=22k and R4=12k as you say

[jap]

thank you Jap

but I use R3=22k and R4=12k as you say

Hi volcano
-See c55=1uf
best time
j.

[volcano]

hi Jap
can you sell to me PIM-2
because I have made two projects, but I do not get a good result
I am more worried

[jap]

hi Jap
can you sell to me PIM-2
because I have made two projects, but I do not get a good result
I am more worried

Hi volcano
-I'm sorry,you Order & asking at the source.
-Put a clear picture of the top and bottom.
best time
j.

[volcano]

Hi volcano
-I'm sorry,you Order & asking at the source.
-Put a clear picture of the top and bottom.
best time
j.

ok Jap

I will put the pictures tomorrow

[volcano]

Hi Jap
what is the value of Vbat
I find it 4 V

[jap]

Hi volcano
Vbat=4.2v
best time
j.

[volcano]

Hi volcano
Vbat=4.2v
best time
j.

thank you Jap
I find it 4.1v

So my PCB is good