Delta Pulse

[ypartal]

What setup did you have for testing ?

So it's very easy. If you have got oscilloscope and power supply.
My test configuration is like attached picture.
Regards.

[HAPPY]

Hi guys，anyone have this pcb file，lay and BOM？Thank you very much！

[kt315]

thank you for attention to my layout. yes, its best, no doubts. i suggest you to do turkish layout that onesided and free.
russians do turkish and sell.
in price of my board is laid my constant consultation. sometimes it's at huge nerves wasted, as with the pakistani. that part, consultations,
is unfortunately invisible for outsiders but really engages 80% of the price.

pleasure
Anatloy

[kt315]

good video and right test on kaska WWII https://www.youtube.com/watch?v=GbI7GBm5-L4

[jeep6789]

Can anyone provide a very sensitive voltage-frequency conversion circuit? Higher accuracy than 555

[kt315]

Can anyone provide a very sensitive voltage-frequency conversion circuit? Higher accuracy than 555

VCO on 555 working good https://www.youtube.com/watch?v=1mo_khvsSvg
do not see a reason to rego on PIC based VCO.

[Vadim18]

Can anyone provide a very sensitive voltage-frequency conversion circuit? Higher accuracy than 555

You can increase VCO sensitivity just only by lowering R37 resistance to 100-200 Ohm. As variant place aditional 200-470 Ohm resistor in paralell with R37 - this will increase current wich produced by current source on T9 transistor (look circuit)
I already do this in my DP unit.

[jeep6789]

I have done a test, ne555 needs to increase by 10mv, the audio output has a slight change, but I want to increase its voltage by 1mv, the output frequency will change, which is conducive to improving sensitivity

[Vadim18]

I have done a test, ne555 needs to increase by 10mv, the audio output has a slight change, but I want to increase its voltage by 1mv, the output frequency will change, which is conducive to improving sensitivity

If you want to experiment, you can add amplifier with 10 x gain + filter and finaly drive VCO.
This idea not mine it was already posted here on forum. Here is my re-drawing.

[jeep6789]

thank you

[kt315]

meet your new greek partner!

New message from: johnsmith-gr

Next week I will be free and I will write you from geotech1 and we will discuss thank you

Your previous message

seems you do not read what i write. REGISTER IN GEOTECH1 AND I WILL TELL
YOU MORE. ebay bans messages with links.
your nativelanders will tell you instead me, greeks.

johnsmith-gr:

I understand do you test this devices performance how deep can go??

Your previous message

sorry, i am not in course of the site. i'm in GEOTECH1 metal detector forum and you may ask/see me there everytime.

pleasure

johnsmith-gr:

Ok it?s not so fast but I will wait can I ask you a question are you selling this board to another site called kapakped???

Your previous message

i think very speedy. 2-3 weeks.
thank you

johnsmith-gr:

Dear seller

I paid for the board that you are selling and I was wondering in how many days I will receive it??

[aft_72005]

Hi KT315
Where is roky pulse file?
Are you have proteus file ?

[aft_72005]

see rocky pulse

Hi KT315
Where is roky pulse file?
Are you have proteus file ?

[kt315]

just some pics. no proteus. no free code. no gerber. zero point.

[aft_72005]

just some pics. no proteus. no free code. no gerber. zero point.

Ok . thus again delta pulse is number 1.
Some design must be test but delta pulse is also perfect