Surf PI that likely will be apprehended....

[Farside]

Yes careful when you break the seal on a CRT. It contains a thin layer of phosphor paint that will become airborne. It's poisonous if you breath it in.

Best to use a pair of pliers like mentioned but all you need to do is twist the end of the neck off slowly. The slower the vacuum inside the tube is eliminated, the less chance of phosphor release.

[Nezocas]

Hi,

Thank´s for the tips.
I have adjusted my delay properly (delay pot all way clockwise).....And I will use the degaussing coil, is lighter, takes up less space and get the same results.




Time to start making the case for all content

Regards

[Nezocas]

Hi

Made some progress
Control box made of rail to pass wires in it
Volume knob, tune and headphones jack placed
Power supply wire to connect to my backpack 4.2A 12V battery



Positive lead of battery interrupted by volume knob





Just need to make the detector rod,.... connect the coil with coaxial cable to the controlbox and isolate it with hot glue

[Nezocas]

Hi,

Final product
I managed to make it lighter than the DEUS from XP only 495.3 grams







In relation to the depth of detection, managed 27cm for a € 2 coin and around 30cm's for my wedding ring 21mm diameter and 4.2g
I leave just a little video to spark the curiosity .... sorry for the poor quality but my camera is really worthless

http://youtu.be/fzV1UdGoW5g

[6666]

Good job, how did you make the rod end its looks commercially made ?
and is it just hot glued to the coil plate ?

[Nezocas]

Hi,

Just heated the detector rod tip and bend it around a little piece to make it ajustble
It as got 2 zip tie to the coil plate and a god amount of hot glue to reinforcement

[6666]

Hi
Thanks for the picture, I am always interested in how people connect the rod to the coil
and the handle to the rod, to me this is the hard part of building a detector
somebody always has new inventive ideas.

cheers
6666

[om287]

Hello friends, buy the kit and I put it together neatly and carefully, then check the welds.
I turned it on and had a high pitch, I followed the calibration steps: Connect the positive lead of the multimeter to pin 6 of NE5534P and the negative lead to ground and went to 0Volt.
Before following currencies tried moving but nothing happened, I returned to calibrate and climbed to 1.37 Volt and there if metal detecting ..
The second problem is that in 0Volt or 1.37 Volt not calibrate the trimmer as Delay, I said it with an oscilloscope, but would help to know what to do.
I also want to know which are the points TP1 and TP2.
I built 4 coils of different sizes and all they detected up to 2 inches is a roll of copper wire of 400 grams, and an inch is the most that I could detect my gold ring ...
6 days ago I keep testing and do not know how to follow.
Request help and suggestions to finish assembly.
Is there a technical manual?
Thank you very much!
Omar

[golfnut]

HI nezocas, I have made the surf too. It is a very tolerant design for different coils and a lot of fun. I have had a couple of samll roman coins with my one. It had a 7" unsheilded coil.

I made a 10" coil and shielded it and the machine was noisey and squeely with that coil - my experience is no shield is better!

S

[darrenk]

getting there with mine, just a few bits to finish, its should be called a thermosurf lol

[GCAA]

Hi there everyone!

Nezocas, I'm new here as I've just decided to build my own metal detector.

As a fellow Portuguese national, living in Portugal, I was wondering if you've tested your machine already? And how did you discovered we can't metal detect on the beaches?

Anyway, great job you did with the surf! I was undecided as to get one of these kits or not but you've made up my mind!

Cheers and happy detecting!

[Nezocas]

Hi again,

I'm looking to modify my PI.
Instead of having a speaker / buzzer when the metal detector finds metal, I would like a vibration device like cell phone vibrating micro motor.
I searched the forum, and I found this scheme .... but I'm having trouble applying it to the Surf PI
Can anyone explain it better...? I only have with me theTIP116 .....not the TIP122
[Attach] 25510 [/ attach]

[Nezocas]

Hi,

I have measured the speaker output, and I only have got 0.1Vdc, when metal moves over the coil....
In the above shematic, the ground simbol goes to my negative battery terminal...???
The +Vmotor connected to the positive battery terminal...???
I have a 12V battery powering my Surf PI .... this probably will burn my vibrating device (cell phone vibromotor)

Any help apreciated
Regards
Nezocas

[6666]

Nezocas

What coil were you using in your video ?
Thanks,

[Nezocas]

Nezocas

What coil were you using in your video ?
Thanks,

0.40mm wire 200mm diameter 21 turns, from degaussing coil from CRT TV

Regards