Delta Pulse

[GeoMax]

Hi KT315,

thanks for the explanation... I know what an electrostatic field is and what effect it can have on an electronic circuit. But that wasn't really my question. The actual question/statement was the last few sentences. "...the electronics and the enclosure (case) should have the same electrostatic potential..." That's why many electronic circuits like audio amplifiers have a "chassis ground" connection to the enclosure (case). If not, you would notice electrostatic interference when you touch the enclosure (case). In my detector circuit, I connect all my electronic circuits to a shielded enclosure (case) using a chassis ground connection.

I think, I have seen similar chassis ground connections (electronic and front-/rear panel) in the Deepers 10 DD schematic or if you look at some Eric Foster detector PCB images you can also see a kind of chassis ground connection to the enclosure as well.

[kt315]

Hello Kt315,

does it really make a noticeable difference if I shield the housing or not? Do you actually need shielding at all if you're not looking under high-voltage lines? Or is it not the case that the electronics and the housing should have the same electrostatic potential?

hi Geo,

I always see misunderstanding of people what is Electrostatic Field. If you will understand the Nature oneday you will never ask me and will do the static protection without mine suggestions.
you will sure make it right on whole your life left.
that is like 'you can supply constantly a men by fish, or to teach him to fish himself'. same case.
Just imagine you/your body is in water environment. water everywhere, water around you. and you can NOT be free of the water and going from.
That is Electrostatic Field, in reality. It is that around you CONSTANTLY. But there is one important condition - if you/your body/your hand/your foot does not move then EF is not showing itself never. BUT JUST MOVE - AND YOU GET EF CHARGING in 10+ kiloVolts potential.

anotherway, present all like a circuit - hands, foots, body, the ground, the air and a detector in your hand, connected in one circuit. present where EF charge will go on and will discharge off.
present a capacitor - how it is working. oops! he is working EF principle using.
present a ligthning in the sky discharging in the ground - same principle, same Nature. no another Nature. so the ground has one potential, the sky has another one. like as two layers of a capacitor. a capacitor is charging up and discharging off passing alternating current in a circuit.

answer is - Electrons are everywhere and you are just seeking a way to protect your coil and enclosure from the influence.

Or is it not the case that the electronics and the housing should have the same electrostatic potential?

it is not an agenda to have the same electrostatic potential. you have to GIVE THE WAY for discharge it COULD GO FREE OUT.
if no, you will hear those cracks and spikes in the detector's speaker that are doing you nerve.

The Wimshurst Machine

MIT Physics Demo -- The Wimshurst Machine - YouTube

Электрофорная машина - YouTube

[GeoMax]

Hello Kt315,

does it really make a noticeable difference if I shield the housing or not? Do you actually need shielding at all if you're not looking under high-voltage lines? Or is it not the case that the electronics and the housing should have the same electrostatic potential?

[kt315]

variant with the foil. cooper side is addressed to enclosure bottom, not to the PCB.

[kt315]

a concept with the resistors i took from DEEPERS 10DD. same resistors to front (metalic) panel and to rear one, same values.
there are two way:
1. you use plactic box. you have to use graphite varnish layer at inner side under the PCB, rear panel and front panel - also will good.
2. you use plastic box but panels front and rear are metalic. it was DEEPERS 10DD. there was just cooper plate under PCB connected by wire to the resistor.

also two cases:
1. you use potenciometers in plastic enclosure. in 1 you have to use graphite cover at front inner side. in 2 nothing.
2. you use pots in metalic enclosure. people connected naked wire the pots one to another, soldered, and the wire's end goes to R59 - best way (in any hole of PCB to the resistor).

in 1 a point of connection of graphite layer to Ground is the cable's socket (it is metallic) touched to the layer. so you have to connect the socket housing to Ground using single naked wire.

[Toros]

DP boards on ebay. click. DELTA PULSE pulse induction metal detector, bare board pcb DIY | eBay

One question to KT315: I am looking at your red board and I cannot find the location of R59. The question arises: Have you combined R59 and R60 into one point for housing shield?

[kt315]

DP boards on ebay. click. DELTA PULSE pulse induction metal detector, bare board pcb DIY | eBay

[kt315]

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

i think he wants LRL detector with automatic attached shovel - seeking the gold itself and digging itself. just seat wait and smoke weed.

[Qiaozhi]

اريد مساعدة في صناعة كشف معادن عن بعد

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[kt315]

اريد مساعدة في صناعة كشف معادن عن بعد

load an archive and learn it step-by-step. https://drive.google.com/file/d/1E2g...usp=drive_link

[Mouhamed]

اريد مساعدة في صناعة كشف معادن عن بعد

[Emersonpaz]

I still have to make a proper coil.

https://youtube.com/shorts/W0pwrAgKA...N7fQBvWoNMQeNC

[kt315]

new manual video from Scultch. https://www.youtube.com/watch?v=XnoAXQyK5rM

[kt315]

load Archive. delete all files except Delta Pulse folder.

https://drive.google.com/file/d/1oPb...usp=drive_link

[Adam24]

I build it. Simple is a very good machine especially with large coil

Ihi is the schematic for the delta pulse here? I see a link above you here in the thread should I follow it?