Delta Pulse

[serban]

We have built up three detectors. One that SnifferXR71 with 45cm coil and the other two as DeltaPulse with large coil 1X1 m. All works absolutely perfect.
I personally instead of the lm556 I mounted two lm555cn circuits (CMOS) - thus increasing stability;
If you want maximum depth of 1x1 m coil then be supplied with two batteries of 12 V (24 V so) - it's basically just IRF powered by 24V - there is here a scheme Bulgarian pi powered at 24V / are a couple of changes.
Regards

[kt315]

mohandes seems made his first WORKING detector using turkish board.

[mohandes]

hi kt315
please say me about the my question .
( i ask it very ) how you certain R6 and R5 , for which coil ( ohm and inductance for coil not important )
can i add C19 , C20 , C23 ,C24 ?
and last question in my pic ?

i use lf357BH and more than better ( 2cm increase for coin ) and ne556 ,lm555 , all tl082
when i change lm555 to TLC555cp sound not work well , why ?

ً AND MANY THANKS TO MY OLD FRIEND Jose.َ

[mohandes]

We have built up three detectors. One that SnifferXR71 with 45cm coil and the other two as DeltaPulse with large coil 1X1 m. All works absolutely perfect.
I personally instead of the lm556 I mounted two lm555cn circuits (CMOS) - thus increasing stability;
If you want maximum depth of 1x1 m coil then be supplied with two batteries of 12 V (24 V so) - it's basically just IRF powered by 24V - there is here a scheme Bulgarian pi powered at 24V / are a couple of changes.
Regards

can you say more about lm555cn , and can help use to make that ?
regards

[kt315]

it is not last question in your pics. I took this way of shielding from Deepers 10DD. had WROTE ABOUT IT. READ ATTENTIONALLY ALL THIS THREAD.
black wire you see at pics under the switch is FOR SHIELDING. this wire GOES TO THE RESISTORS on PCB.

[kt315]

when i change lm555 to TLC555cp sound not work well , why ?

because TLC555 is CMOS type. LEARN DATASHEETS! you have to use ANOTHER R and C values connected to this IC.

[mohandes]

it is not last question in your pics. I took this way of shielding from Deepers 10DD. had WROTE ABOUT IT. READ ATTENTIONALLY ALL THIS THREAD.
black wire you see at pics under the switch is FOR SHIELDING. this wire GOES TO THE RESISTORS on PCB.


[ATTACH]28703[/ATTACH]
[ATTACH]28704[/ATTACH]

best work
. my detector work well by damping R between 560to 1k .
sorry me ok for 10DD i read again .
what do the pot(2kohm ) do ?you fix damping R by it ? can explain ?

can you take pic for your board that i can read all value on your pcb?

what is the Role of C19 , C20 , C23 ,C24 here

regards

[kt315]

what meter is pa1 i see ma but 100-0-100 or something else

the meter is with a scale 0-100 uA or 0-50 uA (micro- Ampere, not milli-).

[kt315]

can you take pic for your board that i can read all value on your pcb?

[N@SKO]

Hi,can I replace R23,24,25,26 4.74k with 4.86k 1%

[mohandes]

well done
kt315 , i change Damping R to 680 ohm .and add the caps C19 , C20 , C23 ,C24.
i use RG59 is it ok ?
can you get us video of your DP 2 ?
regards

[Orbit]

TLC 555 delivers less power to pin 3 the output ,from version NE- 555 itc gives more power and pinout 3 !

[kt315]

T2 (Tr2) signal.

you have to see PRESET signal in check point T2 (on old schematic like as Tr2). period of the signal is 10ms (milli- second) you have to tune by P.P.S. pot on the board. set 10 ms for countries with 50 Hz electric nets - UK, xUSSR, 16,6-16.7 ms for countries with 60 Hz standart electric nets - USA. ie 100 Hz or 120 Hz.

[kt315]

points of checking. placement of o-scope probe at pcb for check of T2 signal.

[kt315]

revised