HammerHead II rev D SMD specialized in prospecting for gold

[darov922]

I decided to start this thread from my personal concern in the search for gold in rivers, I have a mining area 170 km away and I want to build a specialized detector only in the search for small nuggets. On the advice of Carl and Walt, my starting point will be the HH2, since there is a lot of information on this forum and several members who have mounted it.

I have assembled all the components except the Pic12F683, this will be the only non-SMD component, for the reason that this experimental platform will admit other microcontrollers with a greater number of inputs/outputs, to allow parameter adjustment from pushbuttons and visualize values on a display. 2x16 characters.

Once my board is up and running I will start looking for the best timing and coil settings to get the best performance. I attach photos of all the assembled smd components. Dario

[wtrk]

Possible to see smd .lay files ?

[darov922]

Possible to see smd .lay files ?

hello! I only have the files that PROTEUS 8 gave me... I hope they help you. Although you should wait to see if there are modifications and after the tests that there are no changes in the PCB or in the value of any component.





I still don't know how to upload files in this forum... I'm very new!
Dario

[Qiaozhi]

I still don't know how to upload files in this forum... I'm very new!
Dario

When you reply to a thread, click on the Go Advanced button, and then Manage Attachments.

[darov922]

When you reply to a thread, click on the Go Advanced button, and then Manage Attachments.

wow... an eminence has answered me! thanks for your recommendation. Dario

[darov922]

Possible to see smd .lay files ?

here is the proteus file:

[waltr]

Looks good so far.

Not sure why the 8 pin PIC but should work with a fixed set of timing.

I used an 18-pin PIC16F88. To easily adjust timing, GB, etc, I put pots on ADC inputs that the PIC read every 8-16 cycles. Than changed timing.
You are more than welcome to check out and use any of the PIC I posted.

Can you output the schematic in PDF? The screen capture is a little hard to read.

[darov922]

Se ve bien hasta ahora.

No estoy seguro de por qu? el PIC de 8 pines deber?a funcionar con un conjunto fijo de tiempos.

Us? un PIC16F88 de 18 pines. Para ajustar f?cilmente el tiempo, GB, etc., coloco potenci?metros en las entradas del ADC que el PIC lee cada 8-16 ciclos. Que cambi? el tiempo.
Eres m?s que bienvenido a revisar y usar cualquiera de los PIC que publiqu?.

?Puedes sacar el esquema en PDF? La captura de pantalla es un poco dif?cil de leer.

I'm very happy to read you here Waltr... the schematic I'm using is exactly the same as Carl published in 2009, you're very right, the 8-pin Pic has very limited inputs/outputs. At first I will use the original firmware for the PIC12F683 microcontroller to start the detector, later I will replace the PIC12F683 with a PCB with a microcontroller with a greater number of inputs/outputs, a display and buttons to make the modifications of the times from a menu on the screen. The only change I have made is to replace transistor Q4 (MPSA64) with a 2N3906 SMD... I hope this change is not catastrophic and allows the MOSFET to charge and discharge correctly.
I publish the requested PDF, but I think it will still be difficult to interpret since the only objective of the schematic diagram was to facilitate the creation of the PCB with ARES. I still remember that it was quite an achievement to put the whole diagram on an A4 size sheet!
Dario

[Altra]

Looking at your schematic, Q4 is reversed. The 2N3906 emitter should go to the gate of the IRF740.

[waltr]

Looking at your schematic, Q4 is reversed. The 2N3906 emitter should go to the gate of the IRF740.

Good catch. Also Q1 is backwards.
The PDF schematic is easier to read, thanks.

When I did the HH2 the schematic is 3 or 4 sheets.
Main processor was a separate project.

[Altra]

Good catch. Also Q1 is backwards.
The PDF schematic is easier to read, thanks.

When I did the HH2 the schematic is 3 or 4 sheets.
Main processor was a separate project.

It is a nice schematic. To bad the forum doesn't allow you revise uploaded documents. Geotech is full of schematics with typos including some I've posted

[MartinB]

It is a nice schematic. To bad the forum doesn't allow you revise uploaded documents. Geotech is full of schematics with typos including some I've posted

Could all revisions be posted at the top of the thread with brief explanation the same as Voodoo and Arduino PI ?

[darov922]

Thanks for your comments Altra and Waltr, Q13 is also inverted for that reason the LED never went out. I re-upload the corrected files... (Q1, Q4 & Q13 errors)

[waltr]

Oh yes, also Q13.

Unless you have editing privileges on a post then only thing you can do is re-post the newest schematic (document).

Then anyone looking needs to keep scrolling and reading the posts to find if there were errors and get the latest doc.

[darov922]

Well, after a long time I have time for this project again... A PI detector is made up of three parts: the PCB, the coil and the firmware. Now with the finished circuit I will take care of the realization of the coil. I am going to use a coil that I found in the "chance PI" forum and it seemed interesting to look for fine gold, I think this coil is called 3DSS, it has a diameter of 9 inches. I am attaching the CAD file and the .svg that I sent to be cut out of a 3mm thick piece of acrylic with a laser cutter.