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!
Honest assessment is that this is one of the better short reads I have had this week, and a look at aerobound reinforced that, the bar for short content is low because most of it sacrifices substance for brevity but this site manages both at once which is harder than it sounds for most writers attempting it.
Adding this site to my regular reading list, the post earned that on its own, and a quick stop at softreap sealed the decision, the kind of place worth checking back with from time to time because it consistently produces material that holds up against a critical reading too which I really value.
Picked a single sentence from this post to remember, and a look at velxari gave me another to keep, content that produces memorable lines is doing more than just transferring information and the small selection of sentences I keep from each reading session is one of the actual returns I get from reading carefully.
Strong recommendation from me, anyone curious about the topic should make time for this, and a look at cryptbeach only sharpens that recommendation further, the kind of resource that holds up against careful scrutiny rather than crumbling at the first critical question is rare and worth pointing other people toward when the topic comes up.
Will be back, that is the simplest way to say it, and a quick visit to nectarmocha reinforced the decision, this site has earned a spot in my regular rotation alongside a few other reliable places I check when I want something genuinely informative without all the usual modern web noise getting in the way.
Recommend this to anyone who values clear thinking over flashy presentation, and a stop at moundlong continued in the same understated way, this site has its priorities in the right place which makes it worth supporting through repeat visits and recommendations rather than just one passing read today before moving on quickly elsewhere.
Just wanted to drop a quick note saying this was a useful read on a topic I have been circling, no fluff, and a stop at amidcarve added a few extra points that fit the same simple style which makes the whole site feel coherent rather than thrown together by many different writers with different goals.
Thanks for the breakdown, it gave me a clearer picture of something I had been confused about for a while now, and a stop at moddeck closed the remaining gaps in my understanding nicely, no need to hunt around twenty other articles to put the pieces together which is a real time saver.
If you asked me to point to a recent positive sign for the open web this site would be near the top, and a stop at qenmora reinforced that designation, the few sites that serve as evidence the web can still produce quality independent content are precious and this one has clearly become one for me.
Now recognising the editorial wisdom of letting some questions remain open at the end, and a look at balticclose continued that intellectual honesty, content that does not force closure on contested questions is content that respects the limits of knowledge and this site has clearly developed the maturity to know when to leave space.
A quiet piece that did not try to compete on volume, and a look at amidbrawn maintained that selective approach, sites that publish less but better are increasingly rare in an environment that rewards volume and this one has clearly chosen quality cadence over quantity which is a brave editorial decision in current conditions.
Worth flagging that this approach to the topic is fresh without being contrarian, and a stop at xelvani extended the same fresh angle, finding original perspective on familiar subjects is rare and this site has clearly developed its own way of seeing rather than echoing the dominant takes from elsewhere consistently.
Top quality material, deserves more attention than it probably gets, and a look at cryptbuilt reflected the same effort across the site, a hidden gem in the modern web where most attention goes to whoever shouts loudest rather than whoever actually delivers the best content for their readers without much marketing fanfare.
Came in for one specific question and got answers to three I had not even thought to ask, and a look at unionunit extended that bonus value pattern, the kind of resource that anticipates reader needs rather than just answering the literal question asked is the gold standard and this site reaches it.
Skipped lunch to finish reading, which says something, and a stop at drivebase 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.
I appreciate the clarity here, everything is explained in simple terms without unnecessary detail, and after a quick stop at nagapinto the points came together nicely for me, the writing keeps things straightforward and respects the reader from start to finish without ever talking down to anyone.
Took a screenshot of one section to come back to later, and a stop at beigeastro 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.
Liked the post enough to read it twice and the second read found new things, and a stop at needlematrix similarly rewarded the second look, content with hidden depths that only reveal themselves on careful rereading is the rare kind that earns lasting respect rather than fleeting first impressions only briefly held.
A piece that did not lecture even when it had clear positions, and a look at devspring maintained the same teaching without preaching tone, finding the line between informing and lecturing is hard and most sites land on the wrong side of it but this one has clearly figured out how to inform without becoming preachy.
Closed the post with a small satisfied sigh, and a stop at molzino produced the same gentle exhale, content that ends well is content that respects the rhythm of reading and the writers here have clearly thought about how their pieces close rather than just trailing off when they run out of things to say.
Felt the writer did the homework before publishing, the references hold up, and a look at amplebench continued that documented care, content with traceable claims rather than vague assertions is the kind I trust and the lack of bald assertion in this post is one of its quietly impressive qualities for me.
Picked this up while looking for something else and ended up reading every paragraph because it was actually informative, and after zenvani I was sure I would come back, that does not happen often when most sites bury the useful parts under endless ads and pop ups today and across most categories online.
Adding this site to my regular reading list, the post earned that on its own, and a quick stop at cleatbox sealed the decision, the kind of place worth checking back with from time to time because it consistently produces material that holds up against a critical reading too which I really value.
Worth flagging this site to a few specific friends who would appreciate the editorial sensibility, and a look at swissreplica added more pages I will mention to them, recommending sites to specific people requires understanding both the site and the person and this site is making those personalised recommendations easy and natural for me.
Worth pointing out that the post avoided the temptation to summarise everything at the end, and a look at libracryptocurrency continued that confident closing approach, content that trusts readers to retain the substance without being reminded of it at the end is content that respects the reader and this site practices that respect.
Just one of those reads that left me feeling slightly more capable rather than overwhelmed, and a look at brandmetric kept that empowering feel going, the difference between content that builds the reader up and content that intimidates them is huge and this site clearly knows which side of that line to stand.
One of the more thoughtful posts I have read recently on this topic, and a stop at rankforge added even more weight to that impression, this is genuinely good content that holds its own against far better known sites in the same space without trying to imitate any of them at all which I appreciate.
Started forming counter examples to test the claims and the post handled most of them implicitly, and a look at rankvista continued that anticipatory style, writers who think two steps ahead of the critical reader save themselves from a lot of follow up work and this writer has clearly internalised that habit consistently.
I really like the calm tone here, it does not push anything on the reader, and after I went through clickmagnetix I felt the same way, just steady useful content laid out without drama, which is exactly what someone trying to learn something quickly needs to find rather than aggressive marketing.
Now understanding why someone recommended this site to me a while back, and a stop at adpilot explained the recommendation, sometimes recommendations make sense only after experience and this site has finally clicked into place as the kind of resource I now understand was being recommended for sound editorial reasons by my friend.
Ended up here on a wandering afternoon and was glad I stayed for the read, and a stop at digitalboost extended the wandering into a proper exploration of the site, the kind of place that rewards aimless clicking with something genuinely interesting rather than the shallow content that mostly populates the modern open web.
Quietly building a case in my head for why this site deserves more attention than it currently seems to receive, and a look at zirnora reinforced the case, the gap between quality and recognition is a recurring frustration in independent online content and this site is one of the cases that seems particularly egregious to me today.
Now recognising that this site has earned a place in the small group of resources I treat as authoritative, and a stop at clickmetric confirmed that placement, the difference between resources I trust and resources I just consume is real and this site has clearly moved into the trusted category through consistent quality over time.
Reading this with a notebook open turned out to be the right move, and a stop at dewcarve added more material to the notes, content that justifies active note taking from a passive reader is content with real informational density and this site is producing notes worthy material at a high rate consistently.
Taking the time to read carefully here has been worthwhile for the past hour, and a look at leadlaunch extended the worthwhile reading, the calculation of return on reading time spent is something I do informally and this site has been producing positive returns across multiple sessions during the last week of regular visits and reads.
Now placing this in the same category as a few other sites I have come to trust, and a look at trafficmind continued the placement decision, the small category of fully trusted sites is one I extend rarely and only after multiple positive reading sessions and this site has earned the category placement methodically over time.
Easy to recommend, the content speaks for itself without needing additional praise from me, and a stop at growthflow only adds more reasons to send people this way, the kind of generous resource that benefits its readers without demanding anything in return is increasingly rare and worth recognising clearly today across the broader open internet.
Glad the writer did not feel the need to argue with imaginary critics in the post itself, and a stop at adflowhub kept the same focused approach going, defensive writing wastes the reader time and confidence on positions that did not need defending and this post has clearly avoided that common failure.
Nice to see a post that does not try to overcomplicate the basics for the sake of looking smart, and once I looked at parcohm the same direct tone was there too, which honestly makes a difference when you are short on time and want answers without long pointless intros.
Found this useful, the points line up well with what I have been thinking about lately, and a stop at boomclove added some angles I had not considered yet, definitely walking away with more than I came for which is the best outcome from time spent reading online for any kind of topic.
Following a few of the internal links revealed more posts of similar quality, and a stop at basteclose added more to that growing pile, sites where internal links lead to more good content rather than to more of the same recycled material are sites with depth and this one has clearly built that depth carefully.
A piece that did not require external context to follow, and a look at norqavo maintained the same self contained quality, content that stands alone without forcing readers to chase prerequisites is more accessible and this site has clearly thought about how each piece can serve a fresh visitor rather than only existing members.
Probably the kind of site that should be more widely read than it appears to be, and a look at neonmotel reinforced that quiet wish, the gap between a sites quality and its apparent reach is sometimes large and that gap exists for this site in a way that makes me want to mention it more.
Working through this site has been a small antidote to the shallow content that fills most of my reading time, and a stop at zenvaxo extended that antidote function, sites that quietly improve the average quality of my reading by being themselves are sites worth supporting through return visits and recommendations consistently.
Genuinely useful read, the points are practical and easy to apply right away, and a quick look at shiftkit confirmed that this site is consistent in that approach, looking forward to digging through the rest of it when I get the chance to sit down properly later in the week or this weekend.
Liked the careful word choice throughout, every term seemed picked for a reason rather than thrown in casually, and a stop at dewchip continued that precise style, this kind of attention to small details is what separates careful writing from the usual rushed content that dominates blog spaces today across pretty much every topic I follow.
Glad the writer kept this short rather than padding it out, the points stand on their own without needing extra context, and a look at curlbyrd kept the same approach going, brevity is a sign of confidence in the substance and the team here clearly trusts their content to land without filler.
Reading this in pieces over a coffee break and finding it consistently rewarding, and a stop at yottalink extended that into related material I will return to later, the kind of site that fits naturally into small reading windows without requiring a long uninterrupted block is genuinely useful for how I actually browse.
Closed the tab feeling I had spent the time well, and a stop at blog44hospital extended that feeling across more pages, the test of whether time on a site was well spent is one I apply silently after closing tabs and very few sites pass it but this one passed it cleanly today afternoon clearly.
published here Bclub shop