Help to design a PCB for my PI design!

[Götz von Berlichingen]

...
without S&H unit you can not get precision second or third sample , cause converting time of first sample varies according to different stuations of targets.
...

The ATmega8 has Hardware Timers, I guess these can be used here.

multi frequency MD

http://i10.tinypic.com/4bi1zpi.gif

pfd schema

http://md4u.ru/forum/download.php?id=1969

http://www.mikronbg.com/Stinger2.html

[okantex]

Hi 1843 ,
are you sure about analog S&H unit , it has advantages , first it will compansate parasitics and give you average value.
second if you want to have second or third samples from same curve , without S&H unit you can not get precision second or third sample , cause converting time of first sample varies according to different stuations of targets.
but if you say you will do discrimination studies over delay time ratios ,that is okay.
but otherwwise..........

btw schematic is geting closer to PD3200 ,just it uses IC for S&H , still I cold not understand why did the designer use it there?
regards

[zenit52]

Hi 1843,

Please help us,
Your MD produce pulses with atmega8 timers or another ways?
what is your MD pulses frequency and pulse width ????
I am waiting for your answer...
with best regards.
zenit52

[1843]

if you really want something to add to circuit , put 4 S&H caps controlled by mux and analog ADC .
at least you need 2 of them to get samples free from other surrounding EM noises. it is better to subtract second sample which will be taken after end of delay like 300us after TX off time.
and to get precision second or third samples S&H unit is a must.

No, I meant if ther's any defect... and fortunately it seems has no problem!
I'm not going to add analog switchs, S&H, etc.

[okantex]

if you really want something to add to circuit , put 4 S&H caps controlled by mux and analog ADC .
at least you need 2 of them to get samples free from other surrounding EM noises. it is better to subtract second sample which will be taken after end of delay like 300us after TX off time.
and to get precision second or third samples S&H unit is a must.

[1843]

new pcb drawing and discriminative hex

Nobody say anything about the above circuit...?
Is that perfect?
What about the syncing resistor? What value resistor do you suggest?

Please tell us if there's anything else... I don't want to change it again later...


Regards,
1843

[Qiaozhi]

Hi All ,

Carl who banned 1843 , he has problem with entering to geotech.

"
It gives me "Sorry. The administrator has banned your IP address. To contact the administrator click here"

???
"
I dont think you did something like that but I think someone hacked his codes.

can you solve the problem.

regards
Okan

1843 was not banned. Carl was adding a spammer's address to the blocked list, but he accidentally added a wild card in the wrong place ... and banned everybody.

You obviously missed Carl's humble apology that was present at the top of the forums yesterday. It has since been removed.

The forums are now back in operation.

[Aziz]

Hi,

Hi All ,

Carl who banned 1843 , he has problem with entering to geotech.

"
It gives me "Sorry. The administrator has banned your IP address. To contact the administrator click here"

???
"
I dont think you did something like that but I think someone hacked his codes.

can you solve the problem.

regards
Okan

I had the same problem yesterday. I have deleted all the cookies from the browser. And it seems running now.

Aziz

[okantex]

Hi All ,

Carl who banned 1843 , he has problem with entering to geotech.

"
It gives me "Sorry. The administrator has banned your IP address. To contact the administrator click here"

???
"
I dont think you did something like that but I think someone hacked his codes.

can you solve the problem.

regards
Okan

[zenit52]

Hi 1843,

Please help us,
Your MD produce pulses with atmega8 timers or another ways?
what is your MD pulses frequency and pulse width ????
I am waiting for your answer...
with best regards.
zenit52

thank you!

1843 & Qiaozhi
excellent

update

new pcb drawing and discriminative hex

[1843]

And the other changes: