Delta Pulse

[amr muhamed]

your help is only your hands. and may be your head, time to time. on the photo a PCB of one guy that is WORKING. despite on all you can notice too oldest green resistors of 60-70 years' era there, I had throwed off all of them like the garbage many years ago. but anyway THE PCB IS WORKING! this guy even has not conceptions about components' tolerance in electronics!
but anyway THE PCB IS WORKING!

___________________________________________
I test the circuit and (IRF740) heat and smoke ............ I dont know where the problem
______
1-can I dont use the ammeter and replase it by what??
2- is this Diode ?? what is the type of it ??
3&4>>>> ???
the capacitors have a certain type?
___________
thanks in advance kt315

[kt315]

___________________________________________
I test the circuit and (IRF740) heat and smoke ............ I dont know where the problem
______
1-can I dont use the ammeter and replase it by what??
2- is this Diode ?? what is the type of it ??
3&4>>>> ???
the capacitors have a certain type?
___________
thanks in advance kt315

set trimmer POWER or PULSE WIDTH on MINIMUM before you do anything. in another way you will get that Magic Smoke out, living in the transistor but leaving the body out if his owner does not wish be teaching.

1 - certainly. do not use uAmeter.
2-4 - turkish people are TOO active in this thread. they had made NEW DESIGN, I do not know it and will tell nothing you about their PCB. it is why I call this PCB design TURKISH (ie absoliutely unknown for me). please ask turkish men directly.

[Investigator]

I made delta Pulse 2, but did not want to work. Hear the sounds and it fluctuates but is not sensitive to metal. When we go through the searching coil is no sound or no reaction. Send me a scheme by which I could make Delta Pulse will work with labels- integrated circuits and tranzistors ex.BC557 A or BC557C , I DO NOT WANT TO DETECTOR WITH LCD DISPLAY I WANT TO DELTA COMMON ANALOG PULSE METAL DETECTOR.Please send me corect shematic for delta my mail is [email protected] Thank you in advance.Investigator

[Investigator]

I use CD14538BE ,because i have not original integrated circuit.And have not capatitor 15nF (it is onlly one in a schematic, i use 10nF)Please hellp.

[sinko1]

I use CD14538BE ,because i have not original integrated circuit.And have not capatitor 15nF (it is onlly one in a schematic, i use 10nF)Please hellp.

hi friend not bother there ready tested and working. Can we agree on price.Best regards

http://www.geotech1.com/forums/showthread.php?t=18888

[freedan3d]

Hi to all
I had a bad mistake
I had a Short circuit between p6 and p7
I replace any components and my delta work now but it didn't sense gold only
It detect Iron , silver and ... but not gold !!!!
its decrease on depth and sense
I'm confuse

please help me

regards

Freedan3d

[kt315]

Hi to all
I had a bad mistake
I had a Short circuit between p6 and p7
I replace any components and my delta work now but it didn't sense gold only
It detect Iron , silver and ... but not gold !!!!
its decrease on depth and sense
I'm confuse

please help me

regards

Freedan3d

how much a size of coil you use? do you not see a reaction on gold or there is poor reaction but you are waiting more?

[freedan3d]

Hi kt315

It's my honor to talk you
I use a rlc meter and winded my delta coile with 475 mh
I tried a several coil and it had a good resolt
My delta detected a 90% gold coin (16mm diameter) from 25 cm in air befor my fault.
In lcd install process i connected p6 and p7 for 1 minute or more and after that my delta dosen't detect anything.
At last i changed t9 and d8 and it come back again but it sense is now weak and it dosent detect gold only too.

Please help me to fix my dear delta !!!

Best regards

freedan3d

[6666]

This fellow seems to have made a working DP
interesting use of the coil.

http://www.youtube.com/watch?v=1zOiO...eature=related

[freedan3d]

heeeeeeeelp

Anybody help me !! pleeease

[porkluvr]

Anybody help me !! pleeease

Please explain something. I found P6, but where is P7?

[kt315]

In lcd install process i connected p6 and p7 for 1 minute or more and after that my delta dosen't detect anything.

I am not following the update with LCD PCB... can you explain what is p6 and p7 (test points? connector's points? pots? jumper? LCD pins? IC pins?), give a schematic of LCD board and all connections LCD board with the analog main board? then I maybe able to give you a prognosis in your trouble...

[freedan3d]

Hi kt315 and porkluvr
Thank you for your reply

I show this points in schematic and pcb view

this points connect together for a short time (about 1 minte) in my mistake

I want to fix it

best regards

freedan3d

[szucs_g]

Hi kt315 and porkluvr
Thank you for your reply

I show this points in schematic and pcb view

this points connect together for a short time (about 1 minte) in my mistake

I want to fix it

best regards

freedan3d

P6, P7 for speaker or not?

[6666]

The speaker is on J2