Arduino metal detector?

[MartyJ1963]

Hiya Useus,,,,Ignore my last post,,,I managed to open the file now,,,Thanks, Marty.

[MartyJ1963]

Hiya Useus,,,,Thanks for the files. Is there a Sprint layout for the pcb please? I'm having trouble opening the Gerber files in Sprin layout 6. Thanks, Marty.

[FoxyLab]

Finds in our garden with FoxyPI (after electrolytic cleaning):

[FoxyLab]

[FoxyLab]

The double-pole switch with locking in the neutral position and the digital LED voltmeter allow you to determine the voltage of the uC/power battery in any mode of MD operation:

[useus]

these days I have designed a single layer version ready and finished.
In the zip there is all that is necessary.

Read the readme!

[useus]

V0.8

correct capacitor dimensions
fixed an lcd connection
improved component positioning


as soon as the material arrives I produce this version

[bernte_one]

for people without fritzing

[useus]

reduced pcb
small improvements

[6666]

Hello!
[ATTACH=CONFIG]49418[/ATTACH]
Here are the signals at the ADC input - without a target (1), with a target (2). The upper horizontal line is the saturation of the ADC (voltage >= 1.235 V), then voltage gradually decreases to zero.

Thanks for the info, cheers.

[useus]

gnd improvements
displacement components
displacement tracks
removed unnecessary capacitors
added power input diode 1N5819
wires size correction


this is truly the last: P

[FoxyLab]

sure!
however, it is also a convenience factor, do you want to have only one rechargeable battery pack instead of two stylus battery packs to replace when they are discharged?

This is a purely subjective decision, due to this - a discharge of batteries for "digital" power will lead to complete inoperability of the device (therefore, before a long search, I fully charge the "digital" batteries), and a discharge of batteries of "analog" power only reduces the sensitivity of the device.

[FoxyLab]

Hi Foxylab, just wondering when you monitor the output of the LM358 with a CRO, what is the voltage range between the highs and lows of the signal ? thanks
like between arrows.

Hello!

Here are the signals at the ADC input - without a target (1), with a target (2). The upper horizontal line is the saturation of the ADC (voltage >= 1.235 V), then voltage gradually decreases to zero.

[6666]

Hi Foxylab, just wondering when you monitor the output of the LM358 with a CRO, what is the voltage range between the highs and lows of the signal ? thanks
like between arrows.

[useus]

Thanks for hint. You are right with this batts.
But 4% with 15 minutes is not big deal :-) And rebalance is "press btn -> 10 sec pause -> press btn -> READY".

sure!


however, it is also a convenience factor, do you want to have only one rechargeable battery pack instead of two stylus battery packs to replace when they are discharged?