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!
Thanks for a post that does not try to be funny when it is not the moment for it, and a stop at trustperk 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.
Reading this gave me the rare experience of fully agreeing with all the conclusions, and a stop at helioflow continued that agreement pattern, content that aligns with my existing views without seeming designed to do so is just content that happens to be reasonable and this site reads as reasonable rather than ideological mostly.
Skipped lunch to finish reading, which says something, and a stop at webharbor 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.
Now feeling slightly more optimistic about the state of independent writing online, and a stop at 8billiontech extended that quiet optimism, sites like this one are the reason I have not given up on the open web entirely and finding them occasionally renews the case for paying attention to non algorithmic content sources today.
Excellent execution from start to finish, the post never loses its rhythm and the points stay sharp, and a quick stop at accessapp kept the same level going, consistency like this across a site is the marker of a serious operation rather than a casual side project running on autopilot somewhere else.
Glad to have another data point on a question I am still thinking through, and a look at appreap added two more, content that acknowledges its place in a wider conversation rather than pretending to settle the question alone is intellectually honest in a way that I wish was more common across the open web.
Halfway through reading I knew this would be one to bookmark, and a look at softregal confirmed that early intuition, when bookmark intent forms before finishing a post you know the writing has cleared a quality bar that most content fails to clear and this site has cleared it on multiple visits already.
Picked this for a morning recommendation in our company chat, and a look at kyliesbrown suggested I will mention this site again later, recommending content into a workplace context is a small editorial act that requires confidence in the recommendation and this site is making me confident in those recommendations consistently here too.
Picked this for a morning recommendation in our company chat, and a look at blog33much suggested I will mention this site again later, recommending content into a workplace context is a small editorial act that requires confidence in the recommendation and this site is making me confident in those recommendations consistently here too.
Liked the natural conversational tone throughout, never stiff and never overly casual either, and a stop at softplain kept that comfortable middle ground going, finding a tone that respects the reader without becoming distant or overly familiar is harder than it sounds and this site nails that balance consistently across many different pieces.
Closed it feeling I had taken something away rather than just consumed something, and a stop at rebeccasbrown 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.
A particular kind of restraint shows up in the writing, and a look at webprime maintained the same restraint across pages, knowing what not to say is just as important as knowing what to say and this site has clearly developed strong instincts on both sides of that editorial line throughout pieces I have read.
Took a chance on the headline and was rewarded, and a stop at betabright kept the rewards coming as I clicked through, the kind of place where every link leads somewhere worth the click is a small luxury on the modern web where so many sites are mostly empty calories disguised as content.
Reading this gave me the rare experience of fully agreeing with all the conclusions, and a stop at blog66pain continued that agreement pattern, content that aligns with my existing views without seeming designed to do so is just content that happens to be reasonable and this site reads as reasonable rather than ideological mostly.
Even from a single post the editorial care is clear, and a stop at datazen 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.
Reading this felt productive in a way most internet reading does not, and a look at workwelly continued that productive feeling, sometimes the open web feels like a waste of time but sites like this remind me why I still bother to look around rather than retreating to old reliable sources for everything I need.
Comfortable reading experience throughout, no jarring tone shifts and no awkward formatting, and a look at blog33continue kept that smooth feel going, the kind of editorial polish that goes unnoticed when present but glaring when absent is something this site has clearly invested in across the broader content as well which deserves recognition.
Worth flagging this site to a few specific friends who would appreciate the editorial sensibility, and a look at frostgardenmarket 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.
Really nice to see things explained without overcomplicating the topic, the words flow naturally and stay easy to follow, and a short visit to aeroapp only added to that experience because the same simple approach is used across the rest of the page too without any change in tone.
Reading this confirmed something I had been suspecting about the topic, and a look at frostlaneemporium pushed that confirmation toward greater confidence, content that lines up with independently held intuitions earns a special kind of trust and I will return to writers who consistently land that way for me without overselling positions.
Generally I bookmark sparingly to avoid building up a bookmark graveyard but this one earned a permanent slot, and a stop at quadqube extended that permanence designation, the few sites I keep permanent bookmarks for are sites I expect to use repeatedly and this one has clearly cleared that expectation bar today.
Decided to read more before commenting and the more I read the more I wanted to say something, and a stop at slatekit pushed that impulse further, when content provokes the urge to participate rather than just consume it is doing something quite specific and worth recognising clearly when it happens during reading.
The use of plain language without dumbing down the topic was really well done, and a look at devsmith continued in that same accessible style, this is something many technical writers fail at because they either confuse their readers or condescend to them but here neither problem appears at all which is impressive really.
Most blog writing on this subject reaches for the same handful of arguments and this post avoided them, and a look at qualitybuyworld continued the original treatment, content that finds its own path through territory other writers have flattened is content with real authorial energy and this site has plenty of that distinctive energy.
Once I trust a site this much I tend to read everything they publish and that is the trajectory I am on with this one, and a stop at softfalls confirmed the trajectory, the rare progression from interested reader to comprehensive reader is something only certain sites earn and this one is earning that progression rapidly.
Really like that there are no exclamation marks or all caps shouting throughout the post, and a quick visit to zappyzeny maintained the same calm voice, restraint in punctuation signals confidence in the content and this site clearly trusts its substance to do the persuading rather than relying on typographic emphasis.
Probably going to mention this site in a write up I am working on later this month, and a stop at logiclane provided more material for that potential mention, content worth referencing in my own published work rather than just personal reading is content with the highest endorsement level and this site has earned that endorsement.
Got pulled in by the headline and stayed because the content actually delivered on the promise, and a stop at blog66hospital kept that trust intact, when a site lives up to its own framing it earns the right to keep showing up in my browser tabs going forward indefinitely from here on out really.