Delta Pulse

[Belief]

HI Jose Nice VID

Cable flat is not available right now.

Please tell me how can i make it

Iused 0.50 Wire LIV and 13 turn And 4 Ohm for 1*1 . has no sense and

Irf 840 is very overheated .

pleas guide me .

THanks.

Iman Boroumand.

[Belief]

Detection depths.

[WM6]

Detection depths.

[ATTACH]9739[/ATTACH]

Excellent Belief, but what for silver coin 1/3 cm (mean 3,33 mm) exist there? I never seen such miniature coin.

[rajesh]

delta pluse

hi nick i'm wish to
building a delta pluse can you recmond me it or other actually i have hh that working fine but less sensitivity. i need a bear size metal detect at five feet .....rajesh

[Jose]

Hola Belief
Excellent work
I use R 51 and C32 (1 ohm and 4700 mf) and a small sink for IRF 840, I see in the picture.
P3 20K I use 10 K to 60% (approximately 120 microseconds) it seems that this value is the good compromise between power, minimum power consumption and moderate temperature IRF 840.
Coil 1 * 1 meters
This is my experience but not if it is right.
Flat cable as shown in the photo, I got the best return.
With less than 17 or 18 laps, the behavior of Delta Pulse is unstable.
With over 4 ohm resistors reduces the sensitivity.
I think we can try to type workshop with driver 18 X 1 mm.
You can see another example on page 10 post 239, this same forum.

Sincerely, Jose

[okantex]

Hi Jose ,
I double checked schmatic of delta pulse and also checked component list
but can not see parts with nummer R51 and C32

last C is C31 and it is also 4700uF ....


and original delta uses LF357 not lf 356 regards.

I think there is problem with my eyes.
and do you mean NOISE pot as POWER pot??
kind regards,

[ivconic]

Hi Jose ,
I double checked schmatic of delta pulse and also checked component list
but can not see parts with nummer R51 and C32

last C is C31 and it is also 4700uF ....


and original delta uses LF357 not lf 356 regards.

I think there is problem with my eyes.
and do you mean NOISE pot as POWER pot??
kind regards,

Okan, reffering LF356; it can replace LF357 just right. I tried it once in the past and everything was almost exactly the same. I couldn't see differences.
So put anyone you like there; 357 or 356.
And yes; Noise is Power...

Regards!

[Tinkerer]

Detection depths.

[ATTACH]9739[/ATTACH]

I would like to see this 60x60cm gold plate.

Tinkerer

[Belief]

I would like to see this 60x60cm gold plate.

Tinkerer

Hi,
this table is belong to lorenz .

[Belief]

Hi Jeos

when i increasing power knob, IRF840 is overheated.
would you recommend me why?

Thanks.

[rajesh]

delta pluse

hi erolunall i looked over all post of delta pluse. i did not found dimesion of p.c.b. which lenth / width will be give me good result an single sided .....

[erolunall]

Hello


I attached 1.zip printable Pcb for delta pulse .

Best Wishes
Erol Ünal

[DEMAC]

TRY THIS

DP-90X180MM

[kt315]

Hi Jose ,
I double checked schmatic of delta pulse and also checked component list
but can not see parts with nummer R51 and C32

last C is C31 and it is also 4700uF ....


and original delta uses LF357 not lf 356 regards.

I think there is problem with my eyes.
and do you mean NOISE pot as POWER pot??
kind regards,

I see your problem you are waiting anybody must constantly update component list. then why you yourself is not able to do these simple things ALL ALONE?... some recent updates of the oldie schematic were coloured by green. if you may offer another way to contrast the updates... offer pls. an abstruction is not a way....

[kt315]

Hi Jeos

when i increasing power knob, IRF840 is overheated.
would you recommend me why?

Thanks.

because at maximum Pulse Width position of the knob the MOS-FET is working near critical heat mode. the chopper has some resistanse in open state... it is NOT IDEAL device... or you need to choose another one, more modern, more best from modern ones... not IRF840 that is yet OLDIE nowadays.