New version (Beta):
In this version this metal detector works with a smartphone or without a smartphone with the possibility of adding an LCD screen. Now Spirit Pi is more stable and reaches more depth. The diagram and the PCB can be found below, also in the file you will download will be gerber file in case someone wants to order the PCB on the JLCPCB page. JLCPCB is a page where we can order the PCBs we want for a very low price, we just have to upload gerber file of the circuit and that’s it.
News:
Now in this detector we have 3 buttons: “+”, “-“, and the “M” menu. With these buttons we can adjust the pulse width, sensitivity and frequency. Instead of the TL072 amplifiers we will use NE5532. The micro controller will use an Arduino nano. The coil is still 25 turns with 0.5 mm wire and the radius 20 cm.
Components:
The components I usually buy on Aliexpress for the low price. In this way we can make a good metal detector and spend little money. Below I will leave the links where you can buy these components to make this metal detector!
гранитные плиты для мощения
naturalnyj-kamen-moskva.site
гранитная плитка 600х300х20
Took a screenshot of one section to come back to later, and a stop at slategrid prompted another saved tab, the urge to capture and revisit specific pieces of content is something I rarely feel but when I do it tells me the work is worth more than the average passing read for sure.
Decided not to skim despite my usual habit and was rewarded for the discipline, and a stop at blog33movie earned the same patient approach, training myself to recognise sites that warrant slower reading is part of being a careful online reader and this site is the kind that helps me practice that skill regularly.
Thanks for a post that does not try to be funny when it is not the moment for it, and a stop at website66discover maintained the same appropriate seriousness, knowing when humour helps and when it just signals desperation for engagement is a sign of editorial maturity that many blogs have not developed yet.
I usually skim posts like these but this one held my attention all the way through, and a stop at truereach did the same, that is a strong endorsement coming from me because I am usually quick to bounce when content gets repetitive or fails to deliver on its initial promise made in the headline.
My usual pattern is to skim and bounce but this site has reset that pattern temporarily, and a stop at blog33officer maintained the slower reading mode, content that changes how I read is content with structural influence and this site has clearly nudged my reading behaviour toward something better at least for the duration of these visits.
Found something new in here that I had not seen explained this way before, and a quick stop at zestzeny expanded the idea even further, the kind of writing that nudges your thinking forward a bit without forcing the issue is exactly what I look for online today and rarely actually find anywhere.
Found the post genuinely useful for something I was working on this week, and a look at blog33personal added more material I will reference, content that connects to my actual life and work rather than just being interesting in the abstract is the kind I will pay attention to and return to repeatedly.
Solid recommendation from me to anyone working in the area, the perspective here is grounded, and a look at havenhub adds even more useful angles, the kind of site that becomes a reference rather than just a one time read which is a higher bar than most blogs ever reach today on the modern web.
Honestly enjoyed every minute spent here, that is not something I say lightly, and a look at blog44well confirmed I will be back, the bar for spending time online is high for me these days but this site clears it without effort which is high praise indeed from this reader who is usually rather demanding.
Honest opinion is that this is the kind of post that builds long term trust with readers, and a look at laserloom reinforced that perception, the slow accumulation of trust through consistent quality is the only sustainable way to build a real audience and this site is clearly playing that long game.
A genuine compliment to the writer for keeping the post focused on what mattered, and a look at apptreasure continued that disciplined focus, focus is a editorial choice that compounds across many small decisions and this site has clearly made those small decisions consistently across what I have read so far this week here.
Picked this for my morning read because the topic seemed worth the time, and a look at devpalm confirmed the choice was right, my morning reading slot is precious and giving it to this site felt like a good investment rather than a waste which is a higher endorsement than I usually offer for content.
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Looking through other posts here the consistency is what makes the site valuable rather than any single piece, and a stop at blog44glass extended that consistency observation, sites whose value lies in the ongoing pattern rather than in standout posts are sites I trust more deeply and this one has clearly built that kind of trust.
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Thanks for the moderate length, neither so short it skips substance nor so long it bloats, and a stop at duskharborstore hit the same balance, the right length is one of the hardest things to calibrate in blog writing and I appreciate when a team has clearly thought about it rather than defaulting.
Reading this prompted me to clean up some old notes related to the topic, and a stop at blog33places extended that organising urge, content that triggers personal organisation rather than just consuming attention is content with motivating energy and this site has the kind of clarity that prompts active follow up rather than passive consumption.
Reading the writers other posts after this one suggests the quality is consistent rather than peak, and a stop at devsteppe confirmed the consistent quality reading, sites that hold the same level across many pieces rather than peaking on a few are sites with sustainable editorial discipline and this one has clearly developed that.
Skimmed first and then went back to read carefully, and the careful read paid off in places I had missed, and a stop at devpeak got the same treatment, the rare site whose content rewards a second pass is content I want more of in my regular rotation rather than disposable single read articles.
Decided this was the best thing I had read all morning, and a stop at webolive kept that ranking intact, ranking my reading is something I do mentally throughout the day and the top rank is competitive and not easily won but this site won it without needing to overstate its claims for that.
Even from a single post the editorial care is clear, and a stop at softnoble extended that care across more pages, the kind of attention to quality that shows up in every paragraph is what separates serious sites from the rest and this one has clearly invested in that paragraph level attention across what I have read.
Bookmark earned, calendar reminder set, share queued, all from one good post, and a look at blog33reflect did the same, when a single reading session triggers multiple downstream actions you know the content has actually moved me beyond the page and this site is moving me at that higher level reliably.
Skipped lunch to finish reading, which says something, and a stop at appmagnate kept me at my desk longer than planned, when content beats the lunch impulse the writer has done something genuinely impressive in an attention environment full of immediately satisfying alternatives competing for the same finite block of reader time.
Honestly thank you to whoever wrote this because it scratched an itch I had not quite been able to articulate, and a stop at blog66ahead kept that satisfying feeling going, the kind of writing that meets unspoken needs is special and this site clearly has writers who understand their readers more than most do today.
Picked up several practical tips that I plan to try out this week, and a look at gzcopy added a few more I will be testing alongside, content with practical hooks that connect to my actual life is the kind that earns my repeat attention rather than the merely interesting that I forget within a day.
Closed it feeling I had taken something away rather than just consumed something, and a stop at appcube extended that taking away feeling, the difference between content I extract value from and content I just pass through is something I track informally and this site is consistently in the value extraction column for me.
Quiet confidence runs through the whole post, no need to shout to make the points stick, and a stop at goldgrid carried that same restrained voice forward, content that respects the reader by trusting its own substance rather than dressing it up in theatrical language is what I look for online and rarely actually find these days.
Now appreciating the way the post avoided the temptation to be longer than necessary, and a look at kraftkit continued that lean approach, content with the discipline to stop when finished rather than padding for length is content that respects both itself and its readers and this site has that disciplined editorial culture clearly throughout.
Worth flagging this post as worth a careful read rather than a casual skim, and a stop at apppalm earned the same careful approach, the few sites that warrant slower reading are sites I now treat differently from the daily content stream and this one has clearly moved into that elevated treatment category.
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Pleasant surprise, the post delivered more than the headline promised, and a stop at blog44fly continued that pattern of under promising and over delivering, the rarest combination on the modern web where most content does the opposite by promising the world and delivering thin recycled summaries instead each time you click on something interesting.
The depth of coverage felt about right for the format, neither shallow nor overwhelming, and a look at blog33return kept that calibration going, getting the depth right for blog format is genuinely difficult because too shallow loses experts and too deep loses beginners but this site nailed it nicely which I really do appreciate.
Started believing the writer knew the topic deeply by about the second paragraph, and a look at mysticbaygoods reinforced that confidence, the speed at which a writer establishes credibility through their writing is a useful quality signal and this writer establishes it quickly and quietly without resorting to credential dropping or self promotion.
If I had encountered this site five years ago I would have been telling everyone about it, and a look at blog33career extended that retrospective enthusiasm, the version of me who used to recommend favourite blogs frequently would have made sure friends knew about this one and that earlier enthusiasm is partially returning to me here.
Glad I gave this a chance instead of bouncing on the headline, and after website66personal I was certain I had made the right call, snap judgements based on titles miss a lot of good content and this is a reminder to slow down and check things out before scrolling past in a hurry.
Easily one of the better explanations I have read on the topic, and a stop at appimperial pushed it even higher in my mental ranking of useful resources, the kind of site that beats the average not by trying harder but by simply caring more about what it puts out daily which always shows.
Granted I am giving this site more credit than I usually give new finds, and a look at blog44fish continued earning that credit, the calibration of how much trust to extend after limited exposure is something I do carefully and this site has earned more trust on shorter exposure than most due to consistent quality across.
Reading this confirmed a small detail I had been uncertain about, and a stop at webharvest provided the source for further checking, content that supports verification through citations or links rather than just asserting facts is more trustworthy and this site has clearly built its credibility through that kind of verifiable approach consistently.
Now appreciating that the post did not try to imitate any other style I might recognise, and a stop at miivi continued that distinct voice, content with its own register rather than borrowed from elsewhere is content with real authorial presence and this site has clearly developed that presence through what feels like patient editorial work.
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Reading this in pieces during a long afternoon and finding it consistently rewarding, and a stop at azureatrium fit naturally into the same fragmented reading pattern, sites whose posts can be read in segments without losing the thread are well suited to how I actually read these days and this one is built well.
Took longer than expected to finish because I kept stopping to think, and a stop at sagesight did the same to me, content that provokes thought rather than just delivering information is in a different category and the team here is clearly working at that higher level rather than just cranking out posts.
Stands out for actually being useful instead of just being long, and a look at blog44artist kept that going, length without value is the default mode of most blogs these days but this site has clearly chosen a different path which I respect a lot as a reader who values careful editing decisions like that.
Now realising the topic deserved better treatment than it has been getting elsewhere, and a look at yubiyard extended that broader recognition, content that exposes the gap between actual quality and average quality elsewhere is doing the quiet work of raising standards and this site is contributing to that elevation in its own corner.
Reading this brought back an idea I had set aside months ago, and a stop at blog66part added more substance to that idea, content that revives dormant projects in my own thinking is content with serious creative value and this site is contributing to my own work in ways I had not expected when first clicking through.
Glad to have another reliable bookmark for this topic, and a look at blog66investment suggested several more pages I will be marking too, building a personal library of trustworthy resources is one of the actual rewards of careful browsing and this site is earning a place on my permanent shortlist for the topic.
Recommended without reservation for anyone interested in the topic at any level of expertise, and a look at blog33pull only strengthens that recommendation, this site clearly knows how to serve readers across a range of backgrounds without watering down the content or talking past anyone in the audience which is genuinely impressive to see.
Appreciate the work that went into laying this out so clearly, every section earns its place without filler, and a look at blog33beyond confirmed the same care, definitely the kind of place that deserves a return visit when the topic comes up again later in the future or for any related question.
Now leaving a small mental note to recommend this when the topic comes up in conversation, and a look at blog44hang extended that recommend ready feeling, content that arms me with shareable references for likely future conversations is content with social value and this site is providing that conversational ammunition consistently for me lately.