Arduino metal detector?

[FoxyLab]

Errors that may occur during zeroing:

ERR 01 - the saturation section was not found in the signal:

• coil break
• no pulse generation
• the signal during zeroing is so strong that the saturation region is shifted beyond the registration window

ERR 02:

• the signal during zeroing is strong enough so that the saturation region lasts until the end of the registration window

[MartyJ1963]

Thanks Ozferret,,Regards, Marty

[walkman]

New drawing for Geotech1.com

[FoxyLab]

FoxyPI firmware v3.7:
FoxyPIv3_7.ino.eightanaloginputs.hex

What's new in version 3.7:
* small code optimization was performed to increase the stability of the metal detector
+ beep indication for errors ERR 01 and ERR 02 added

[6666]

edit

[ozferret]

Check the grounds using the test probe. You have a couple of tracks with zero clearance.
The FET is also shorted.

[MartyJ1963]

Thanks BernteOne,,I didn't know if I placed the electrolytics correctly or not. Is this size pcb ok or shall I make it smaller? Thanks, Marty

[bernte_one]

the sprint layout design you do seems ok
cant find the problem you mean

electrolytic caps with +/- are right direction
non electrolytic are equal in direction

[MartyJ1963]

Thanks. I need to know if I have oriented the capacitors the correct way because it doesnt show the polarity on the bmp image. Thanks, Marty

[bernte_one]

i can do this evening

after this weekend it is better load jpg screenshot here so i can see it from mobile phone

i am on holiday and will not take the laptop with me

[MartyJ1963]

@BernteOne,,,,Can you check this drawing for me please? Have I placed the Capacitors at the correct polarity? If the drawing has no errors I will try to make the board smaller. Thanks, Regards, Marty.

[MartyJ1963]

@BernteOne,,,Thank you for the 'New' Sprint layout tuition! This Forum is great that it has helpful people like yourself,,,I'm working on a few projects that I know will be of use for other members of Geotech in the future,,,It will be a nice feeling when I know that I have finally contributed something of my own as a thank you to the Forum for all the knowledge I have learnt on Geotech. I will start to re-draw the Foxy MD later tonight and I'll post it for you to check at your convenience. Thanks again for your time and patience, Regards, Marty.

[bernte_one]

hy Marty i could do it, but i have no time these days, the school holdiay begins
so i can continue at midle of july

but i think it is a good training if you draw a bit wtih sprint layout
also remind to set a good practival hole diameter for the pins
ic sockets 2mm outer and 0,6 or 0,7 inner
for bigger ca 1000uF and more set 2,2mm / 1mm
1/4w - 0,6w resistor 1,8 /0,6mm
bigger resitors 2w (damping) 2/1mm
mosfet oval holes , etc...

if you have a wire bridge or sme tracks that cross another track just put it on copper top layer
same production costs at the end, no need for wire bridges

i am experienced in pcb ordering so if design is finished i can provide geotech user with pcb
1-3€ per unit plus shipping for example (alexey and marty without any charge)

my problem is just time besides my family

[MartyJ1963]

@BernteOne,,,,,,Thanks! You taught me something I didn't knowhow to do. I will have a go now dong it with a proper ground plane,,Thanks again BerntOne. Regards, Marty

[bernte_one]

hy marty look the hinds i marked you in the screenshot

i added a second pcb in the same file just switch the tab or worksheet in sprintlayout file

new.zip