Bulgarian 'PULSE STAR' (... close to Legendary one)

[mesy64]

dear georgi.g.zhelev
is this osilograme for pin 3 ic 555 ok?

[georgi.g.zhelev]

PS-G

mesyna, until now all is well. Oscilloscope: "HORIZONTAL", including a 50mks

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C.L!

[kt315]

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now all are OK - ?

[georgi.g.zhelev]

PS-G

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now all are OK - ?

Hi KT315! Hi everyone! Sorry for bad English, use GOOGLE translator. But here is the Tech Forum, a forum not an English filologi. OK? G.L!

[okantex]

hi georgi,

please explain.
how does it discriminate gold ,copper,silver and iron

I know ,iron and gold has same delay time.
likely 270 usec.
jyst curve is different
please explain more

[georgi.g.zhelev]

PS-G

Mesyna, sorry, mistake. Not the pulse width is 150 mks, corrected it to 150 mks.

[mesy64]

hi dear georgi.g.zhelev
150mks What is the difference 150mks They both are a form?
Please recommend me a reliable pcb??
I think my problem is that the pcb??
With respect
mesyna

[georgi.g.zhelev]

PS-G

mesyna, sorry, but the problem is not PCB.Problem is lower your training in Electrical, Radio and Electronics, and lack of experience in the manufacture of metal detectors. You need someone who can help you. Manufacture of metal detectors is not an easy job!</SPAN>
G.L!

[georgi.g.zhelev]

PS-G

MESYNA, SEE !!

[mesy64]

tank you dear georgi.g.zhelev

now this osilogram for pin 3 (555) is ok?

[georgi.g.zhelev]

ps-g

mesyna, all ok! ne5534 pin 6 + 0,2 v (trimer).

[georgi.g.zhelev]

PULS STAR-G

hi georgi,

please explain.
how does it discriminate gold ,copper,silver and iron

I know ,iron and gold has same delay time.
likely 270 usec.
jyst curve is different
please explain more

Hi, okantex, hi all! Discriminator how it works, I can not explain, no one can how.GURU know? Still works!! Before I did a little test:
GOLD (Au) COPPER (Cu); LEAD (Pb); SILVER (Ag); BRONZE ... ALL IS '"NOT FERRO "100%. IRON (Fe), aluminum (Al) "FERRO" 100%. Were granted me, That's true!
G.L!

[mesy64]

mesyna, all ok! ne5534 pin 6 + 0,2 v (trimer).

dear georgi.g.zhelev
I pin 6 (5534) took measures. Voltage of 0.5 volts and with trimer time does not change at all. Once I replace the 5534 but was still constant voltage
Why's friend?
Please help me
With respect
mesyna

[georgi.g.zhelev]

ps-g

[цитирам = mesy64; 108759] Уважаеми georgi.g.zhelev
Аз ПИН-6 (5534) е взела мерки. Напрежение на 0,5 волта и с тример време не се променя изобщо. След като замени на 5534, но все още е постоянно напрежение
Защо приятелят?
Моля да ми помогне
По отношение
mesyna [/ цитат]

check scheme, trimer NE5534 pin 1 and pin8, middle edge trimmer R21 (27k) to +8 v

[mesy64]

=

check scheme, trimer NE5534 pin 1 and pin8, middle edge trimmer R21 (27k) to +8 v

dear georgi.g.zhelev
i chek all parts .
all is corect and according schematic.
trimer is conect pin 1 and pin 8 and r21 to +8