redesign of tiny from pulsdetektor.de

[bernte_one]

hello all

i need help to redesign a pi detector layout.

is the german "tiny" from www.pulsdetektor.de

the design is from 2002 but is still a good beginner detector with a lot

of modifacation option.

im not 100 percent sure and able to do redesign.

but what i want is change Q1 MTP2P50E (PMos/500V) as replacemant
the layout should take a irf9640 plus two biderectional supressor diodes

another change could be to change U2 LF357 to another one, lf357 is out

of production and hard to get or very expensive.

i would be nice if someone could do a new layout
with new Q1 plus diodes

changing u2 is a task for later is hard to find a substitute.

regards bernd

[zomby]

Пробвай IRF740

[bernte_one]

Пробвай IRF740

did you mean i should use irf740 instead of mtp without any other changes?
looks good low on resistance so more power for coil - but no other protection needed?

should add one bidirectional Suppressor Diode (1.5KE400CA) parallel to coil

greetings bernd

[zomby]

LF357 смени със NE5534

[zomby]

Така е добре

[bernte_one]

thanks zomby

but i have some problems with russian language

i think i can see what you mean

here latest video
http://www.youtube.com/watch?v=70wtA...ature=youtu.be

regards bernd

[zomby]

This probe is a 28 cm. If so may want more depth for small items is otherwise very good.

[Geo]

The coil is a dualfield so no problem with small objects

[zomby]

The coil is a dualfield so no problem with small objects

видео http://www.youtube.com/watch?v=70wtA...ature=youtu.be отношение Бернд

[Geo]

The coil at video is not a dual-field coil. If you read at the site of pulsedetektor you will find the detail of the dual-field coil who is more sensitive to small objects

[Qiaozhi]

видео http://www.youtube.com/watch?v=70wtA...ature=youtu.be отношение Бернд

Zomby - please make your posts in English.
Here are the Forum Rules ->
http://www.geotech1.com/forums/showthread.php?t=10526

[Davor]

But video also reveals a big delay in detection. Me no likey

[bernte_one]

hello

question was for possible redesign
so that i could it made more modern

coil in video is a monoloop

has enough sens for small objects and for my task

but you are right there is also a dual field planar shaped coil for this unit
shown and also a dual field with a outer ring and and inner star with three spikes
so you get fields with higher and fields with lower em concentration

the tiny which is shown has only a little part of all possible mods

the pots are
volume/tune with on/off switch
fine threshold with with multiturn pot
pot for variable coil damping

other can be sampling delay and pulswidth
in this case some resistor are replaced by pots

for using a supressor diode parallel to coil i dont need to redesign right?
just to solder one between coil connector inside housing would be best solution?
(when using a irf... for q1)

regards bernd

[zomby]

Zomby - please make your posts in English.
Here are the Forum Rules ->
http://www.geotech1.com/forums/showthread.php?t=10526

Vibrant and strong Santa Valentines's Day. What I want to tell people the forum is to help them understand what it is about you I do not publish notice in English but I said that my English is not good andis thus you make it impossible to communicate my regret. I optitvam is to write a little about not embarrass people. but there google translator who profit az.I and I read some nonsense translated in my language but I try to understand what it is, let everyone show imagination and logic. Happy Holidays

Отмяна на редакциите

[kt315]

but i have some problems with russian language

it is not written in russian. i ask you people to write on international english, i do not understand if you write Me no likey. for an example.