Delta Pulse - Take 2

[kt315]

you show my o-scope pic... yes, that is mine... but one men in Greece ASKED ME to RETUNE DP board on lowest FIRST SAMPLE DELAY
and 300 Hz frequency. while i was categorically against any retuning. then he had turned up south cunning...
he paid for board... and told again about the retuning -! i warned him that then i do not bring any burden for future unstability -!
so you just took the pic from a context that you do not mention.
BTW he got this unstability and asked me "to solve the trouble".

[Vadim18]

Oh, now i understand.
Thanks for explanation.

[kt315]

Hello Anatoly,

both boards works fine and I experimenting with coils. * But I have one question,
I search a box for the pcb, which have you taken ?

----
i suggest this one 200*175*70mm

https://www.aliexpress.com/item/4000...archweb201603_

[sunita.pradhan]

Can we use voltage dividers (using resistors) across 12v power supplies +ve &-ve to supply power (6 v) to an additional LM386 amplifier circuit on delta pulse.
If yes where should we place these resistors ?
Sorry !! i have a very little knowledge on electronics..

[sunita.pradhan]

OR is it better to connect a DC to DC buck converter ?

[Vadim18]

Can we use voltage dividers (using resistors) across 12v power supplies +ve &-ve to supply power (6 v) to an additional LM386 amplifier circuit on delta pulse.
If yes where should we place these resistors ?
Sorry !! i have a very little knowledge on electronics..

This is really bad idea, don't use any audio amplifier with DP. Why you need additional amplifier? Maybe your speaker is bad or it connected without capacitor (in series with speaker), or capacitor connected with wrong polarity.
I use tiny speaker from PC, and i even taped it with paper scotch when i do tests on table, otherwise sounds to loud.

[sunita.pradhan]

Thanks Vadim18 for your reply. I think you are right !!! I will follow your advice..

[kt315]

first of all you have to do begin soldering a board to set just the sound part
and check the sound. then you will sure know this part is ok.
https://www.youtube.com/watch?v=ODtvLeWdre0

[ZOUjiarui]

Who is the author of it? I had purchased its motherboard, but I lost it, I did not try. I have it laid out.

[ZOUjiarui]

Here is the original

Hello.

[ZOUjiarui]

Sorry, I misquoted the previous article.

[ZOUjiarui]

[ATTACH]53896[/ATTACH]
DP?Has anyone ever made this? What's the actual effect? Do you have any pictures about it?

Hello.

[kt315]

took pics from this link http://www.vesturesklubs.lv/forum/4-1461-1

[kt315]

Dear Anatloy,

I almost done putting all the components on the PCB board. Since I am a beginner and not familiar with this project, I would like to ask few question? 1. What is the test procedure and calibration of this circuit board? 2. Do i need to check the test point using oscilloscope before putting the Mosfet and diode on the circuit board or I need to put all components before before doing the calibrations? Please kindly provide calibration steps. Thank you.


Sincrely Yours,

S/L

ok. FIRST AT ALL, Take 2 LOL!

1. NO TEST PROCEDURE. DP is not needed in test. THIS IS SIMPLEST AND EFFECTIVE device.
you need to tune 100 Hz, or 120. points T2 and T3. that's depending on your there ELECTRIC NET STANDART. we call it 'the AC voltage in my room power sockets'.
we have here 50 Hz and i set 100 Hz.
US has 60 Hz and an american amigo must set 120 Hz.

is it clear?

2. desirable, you need check all logic levels in test points according the signal diagram. also check the voltage levels too.
3. whole calibration steps manual is unaccessabble because DP is stolen product, DIY product.

pleasure

[Sally]

Hello Kit315, I did a test on the DP and this is the result: 2.5cm coin = 10cm, coke can made of aluminum 330ml = 30cm detection.
I used 28 cm. coil,#25awg (.45mm) copper wire with inductance of 425 micro henry. For me the result are far behind from others who made this project here.

I did not change anything since i want to follow the schematic you provided and wait for your advice.

Regards,
Sally