Delta Pulse

[berreizeta]

Exact !! mine = 1.58v ..... but.... don't works

Measurements (IRF740 removed):

TR0 = 12.44v
TR1 = 7.07v
TR2 = 1.67v
TR3 = 1.67v
TR4 = 1.65v
TR5 = 1.65v
TR6 = 6.77v
TR7 = 7.05v
TR8 = 7.06v
TR9 = 1.58v

Thanks KT315

[kt315]

-- all measurements in board on DIGITAL ICs (marked DD - DIGITAL DEVICE) you do in reference to -E point.
-- all measurements on ANALOG ICs (marked DA - device analog, operational amplifiers) you do in reference to SCHEMATIC EARTH point, output of DA4:A.
-- in -E level in reference to -BAT=-12V battery pin, you have to see U(D+U(D9)~0,8V+0,8V~+1,6V.
-- shielding point for a coil is +E = +BAT=+12V, positive battery pin.
-- shielding points for housing are +E but via R59 and R60, 100ohm.

[berreizeta]

Hi,

Can anyone tell me what is the value of -E ??


Thanks

[kt315]

ok! yes, certainly I share out every step everybody can be able to repeat those. do not worry, comrade Moha. DP is on stage of checking and tuning...
in last revision of part list I gave due R4 C3 value, tuning PULSE WIDTH TIMING to 150-500 us. thinking this would be good scale for the deeper.

have a fun with DP

[mohandes]

thanks kt315
i try to finish DP2 and make king cobra .
i will add C40 to C43 and Comparison with last version .but if you can please take video for your DP and past here .
have a good time

[kt315]

revised

[kt315]

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

[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.

[Orbit]

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

[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

[N@SKO]

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

[kt315]

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

[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-).

[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]

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.