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!
Worth marking the moment when reading this clicked into something useful for my own work, and a look at velvetgrovecrafts extended that practical click, content that connects to my actual life rather than just being interesting is content with the highest kind of value and this site is generating that connection at a high rate.
Liked the natural conversational tone throughout, never stiff and never overly casual either, and a stop at digitalcartcenter 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.
Took my time with this rather than rushing because the writing rewards attention, and after goldensprucegoods I had even more to absorb, the kind of content that pays back the patient reader rather than punishing them with empty filler is something I look for and rarely find in regular searches lately.
Reading this in pieces during a long afternoon and finding it consistently rewarding, and a stop at radiantpinecollective 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.
Quality you can feel from the first paragraph, the writer clearly knows the topic and how to share it, and a quick look at fasttrendcorner confirmed the same depth runs throughout the rest of the site as well which is rare and worth pointing out when it happens online for any reader passing through.
Appreciate the work that went into laying this out so clearly, every section earns its place without filler, and a look at twilightgrovegoods 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.
Honestly enjoyed not being sold anything for the entire duration of the post, and a look at luxuryfindshub kept that pleasant absence going across more pages, content that exists for its own sake rather than as a funnel to a paid product is increasingly rare and worth supporting where I can find it.
A handful of memorable phrases from this one I will probably use later, and a look at velvetfieldstore added a couple more, content that contributes language to my own communication rather than just facts is content with a different kind of utility and this site is providing that linguistic utility consistently across what I read.
Glad the writer did not feel the need to argue with imaginary critics in the post itself, and a stop at sunwovenmarket 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.
A clean read with no irritations, and a look at goldendriftmarket continued that frictionless quality, the absence of small irritations is something I notice only when present elsewhere and this site is one of the rare places where everything just works and lets me focus on the substance rather than fighting the format.
Solid stuff, the kind of post that I will probably refer back to later this month when the topic comes up again, and a look at silverpetalemporium only confirmed I should bookmark the site as a whole rather than just this single page for future reference and use across coming weeks.
Reading this triggered a small change in how I think about the topic going forward, and a stop at swifttrendstation reinforced that subtle shift, the rare content that actually moves my thinking rather than just confirming or filling it is the kind I most value and this site is providing that kind of impact today.
Top tier post, the kind that makes you want to share the link with friends working in the same area, and a stop at frostbaycollective only made me more confident in doing that, this site is one of the better resources I have seen on the topic recently across both new and older posts.
Worth saying that the quiet confidence of the writing is what landed first, and a look at premiumgoodscorner continued that quiet quality, confident writing without the loud display of confidence is a rare combination and this site has clearly developed both the knowledge and the editorial restraint to land that combination consistently.
Reading this triggered a small reorganisation of my own thinking on the topic, and a stop at prismoakcollective furthered that reorganisation, content that affects the shape of my mental model rather than just decorating it with new facts is content with structural rather than informational impact and this site provides that.
My friends would appreciate a few of these posts and I will be sending links accordingly, and a look at blossombaycollective added more pages to my share queue, content that earns shares to specific people in specific contexts is content with social utility and this site is generating those targeted shares from me consistently lately.
Reading this prompted me to dig into a related topic later, and a stop at blossomhavenmarket provided some of the starting points for that follow up reading, content that triggers further exploration rather than satisfying curiosity completely is content with real generative energy and this site has plenty of that energy throughout it.
Skipped the comments to avoid spoilers and came back later to find them genuinely worth reading, and a stop at shadowglowcorner extended that surprised respect, when the discussion below a post matches the quality of the post itself you have found something special and this site appears to attract that kind of audience.
Big thanks to whoever wrote this, you saved me a lot of time hunting for the same info on other sites, and a stop at goldenferncollective only added more useful detail without going off topic, that kind of focus is honestly hard to come across these days when most posts wander everywhere.
The depth of coverage felt about right for the format, neither shallow nor overwhelming, and a look at goldenfernmarket 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 reading without much expectation and ended on a high note, and a look at cloudridgegoods continued that arc, content that builds rather than peaks early is a sign of a writer who knows how to structure a piece for sustained reader engagement rather than relying on a strong hook to do all the work.
Bookmark earned and shared the link with one specific person who would care, and a look at radiantshorestore got the same targeted share, sharing carefully rather than broadcasting is a discipline I try to maintain and this site is generating shares from me at a sustainable rate rather than the spam rate of viral content.
Started imagining how I would explain the topic to someone else after reading, and a look at rapidtrendzone gave me more material for that imagined explanation, content that improves my own ability to discuss a topic is content that has actually transferred knowledge rather than just decorating my screen for a few minutes.
Reading this gave me a small jolt of recognition for an experience I thought was just mine, and a stop at frostpinecollective produced more such jolts, content that universalises private experiences without flattening them is doing genuinely useful work and this site is providing that recognition function for me reliably across topics I read.
Now appreciating that the post left me with enough to say in a follow up conversation, and a look at amberridgegoods added more material for those follow ups, content that prepares me for related conversations rather than just informing me alone is content with social utility and this site provides that social armament reliably for me.
Started taking notes about halfway through because the points were stacking up, and a look at urbantrendzone added enough material that my notes file grew further, content that demands note taking from a passive reader is content with substance and the writers here are clearly producing that kind of work consistently across topics.
Now appreciating that the post did not try to imitate any other style I might recognise, and a stop at amberlighthousegoods 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.
Reading carefully here has reminded me what reading carefully feels like, and a look at echoferncollective extended that reminder, the experience of careful reading versus skimming is different in ways I had partially forgotten and this site has clearly refreshed my memory of what attention feels like when content rewards it consistently.
A piece that did not waste any of its substance on sales or promotion, and a look at urbantrendarena continued that pure content focus, sites that resist the urge to monetise every paragraph are increasingly rare and this one has clearly made the editorial choice to keep the writing clean from commercial intrusion which I value highly.
Bookmark added without hesitation after finishing, and a look at echopetalbazaar confirmed I should bookmark the homepage too rather than just this page, the rare site that earns category level trust rather than just single article approval is the kind I want to rely on across many different topics over time.
Generally I find the content on similar topics frustrating in specific ways and this post avoided all of them, and a look at blossomhorizonstore continued that frustration free experience, content that sidesteps the standard failure modes of its genre is content with editorial awareness and this site has clearly studied what fails elsewhere consistently.
I really like how the writer keeps the tone friendly without sounding fake or overly polished, and after a stop at twilightcreststore the same calm pace was there, no rushing to make a point and no padding either, just clean honest writing that I can respect and come back to later again.
Genuinely good work, the kind that holds up over multiple readings without losing its appeal, and a stop at modernoutfitstore kept that going, definitely a site I will be returning to and probably mentioning to others who work in or care about this particular area of interest today and in coming weeks.
Strong recommendation, anyone interested in this topic owes themselves a visit, and a stop at echopinecollective extends that recommendation across more of the site, this is the kind of resource that makes me more optimistic about the state of the open web than I usually am these days actually for once which is genuinely refreshing.
The conclusions felt earned rather than tacked on at the end like an afterthought, and a look at glowforgeessentials kept that careful structure going, you can tell when a writer has thought about the shape of their post versus just letting it ramble out and hoping for the best at the end which most do.
Sets a higher bar than most of what shows up in search results for this topic, and a look at digitaldealcorner did not lower that bar at all, in fact it confirmed the impression, this is the kind of consistency that earns a place in regular rotation for serious readers instead of casual scrollers passing through.
A piece that demonstrated competence without performing it, and a look at digitaldealzone maintained the same self assured but unshowy register, the gap between competence and performance of competence is one I track and this site has clearly chosen to demonstrate rather than perform which I find much more persuasive as a reader.
Most blog writing on this subject reaches for the same handful of arguments and this post avoided them, and a look at velvetoakcollective 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.
Honestly the simplicity is what makes this work, the topic is not buried under filler words or overly complex examples, and a quick look at goldendunemarket showed the same sensible style, I left with what I came for and no headache from over reading which is a real win these days.
Felt the writer respected me as a reader without making a show of doing so, and a look at blossombaycollective continued that quiet respect, this is the kind of small but meaningful detail that separates the sites I bookmark from the ones I close after a single skim and never return to again no matter how interesting the headline.
Worth flagging this site to a few specific friends who would appreciate the editorial sensibility, and a look at urbanpinegoods 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 recommending broadly to anyone who reads on the topic, and a look at digitalpickmarket only confirms that, the rare combination of accessibility and depth in this site makes it suitable for both newcomers and people who already know the area which is hard to pull off in any blog format today and rarely managed.
Worth flagging that the post handled an angle of the topic I had not seen elsewhere, and a look at mysticthreadstore extended that fresh treatment, content that finds underexplored corners of well covered subjects is genuinely valuable and this site has demonstrated that exploratory editorial approach across multiple pieces in my reading sessions today.
Once I had read three posts the editorial pattern was clear, and a look at amberpetalmarket confirmed the pattern from a fourth angle, sites where the underlying approach reveals itself through accumulated reading rather than being announced are sites with real depth and this one has that quality clearly visible across multiple pieces consistently.
Pass this along to colleagues if the topic comes up, the framing here is sensible, and a stop at echohollowmarket adds more useful angles to share, the kind of content that improves conversations rather than just feeding them is what makes a resource genuinely valuable in professional contexts going forward over time and across project boundaries too.
Even on a quick first read the substance of the post comes through, and a look at boldtrendmarket reinforced that immediate quality, content that does not require a slow careful read to demonstrate value but rewards one anyway is content with real depth and this site has produced work of that demanding depth class.
The depth of coverage felt about right for the format, neither shallow nor overwhelming, and a look at windcrestcollective 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.
Useful enough to recommend to several people I know who would appreciate it, and a stop at besttrendstation added more material I will pass along too, the kind of writing that earns word of mouth is the kind that actually delivers on its promises which is what this site does without any drama or fanfare attached.
Got pulled in by the headline and stayed because the content actually delivered on the promise, and a stop at blossomhavenmarket 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.
A piece that exhibited the kind of patience that good writing requires, and a look at echogrovecollective continued that patient quality, hurried writing is easy to spot and this site reads as having been written without time pressure which produces a different feel than the rushed content that dominates much of the modern blog space.