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!
Skipped the related links section thinking I had read enough and then came back to it later when curiosity got the better of me, and a stop at elitepickarena confirmed I should have just read it first, every section of this site appears to deserve careful attention rather than skipping past lazily.
Now appreciating that the post left me with enough to say in a follow up conversation, and a look at jasperjoy 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.
Closed the tab and immediately reopened it ten minutes later because I wanted to reread a part, and a stop at blog44authors drew the same return, content that pulls you back after closing it is doing something well beyond the average and worth marking as exceptional in my mental catalogue of reliable sites.
If the topic interests you at all this is a place to spend time, and a look at warewelly reinforced that recommendation, the broader question of where to invest topical reading time is one this site answers convincingly through the consistent quality across multiple pieces I have sampled during the current reading session today.
Reading this prompted a small note in my reference file, and a stop at heliohive prompted another, the rare site that contributes useful nuggets to my own working knowledge rather than just consuming my attention is worth the time investment many times over compared to the usual pile of forgettable scroll content.
Now sitting back and recognising that this was a small but real win in my reading day, and a stop at pearldash extended that quiet win, the cumulative effect of small reading wins versus the cumulative effect of small reading losses is real over time and this site is contributing to the wins side of that ledger.