Help to design a PCB for my PI design!

[YIVANKA]

？

[geoscash1]

Anything new or happening with this project?

[gamen83]

Nevermind, I found the answer by myself.
Thanks to the hundreds of "knowing" people who helped me...

[gamen83]

Hello guys,

I know this is an old thread, but I'm really interested in this scheme and would like to ask you a question:
What is the purpose of d6, c10 and r13? Is this to shift the voltage level from -/+5V to 0-5V?
I want to experiment with DSP but don't know how to interface the ADC with preamp. I'm pretty good at coding but really bad in electronics, so I will appreciate any advice regarding interfacing the preamp and ADC. I won't do any commercial stuff, just doing it for my own fun.

Thanks in advance!

[skylly]

I have make this pi, It display is OK, But it cant detect anything.
If I connect the Base and Emitter of Q9, It smokes everywhere, And I dont know why.

[WM6]

The PCB I posted is a Whites Surfmaster (unfinished) clone.

When it is finished, I will post the PDF and the Protel format of the PCB here.

Hi Sean, not finished yet?

[Qiaozhi]

Here to answer questions? Or should not be knocking on the closed door?

You need to ask 1843, as it's his design.

[smity]

Please Give answers

Here to answer questions? Or should not be knocking on the closed door?

[dfbowers]

What an interesting read this thread is ....
I have just registered with geotech.

Here are some photos of my version attached ...

Note the careful layout

Oh and I made some changes ... to remove alot of noise issues the coil feed line passes through a bifilar "balun" ... it does not affect the pulse.
ie reduces the unbalanced antenna effect of the feedline. ( I used to be an RF guy )

I use a CA3130 as first amplifier ( FET inputs ... much higher input Z )

The uP is a DSPIC 30F4012.

A switch mode supply provides 16 volts for the analogue no sync.

A 12 volt batt pack from a $15 dollar drill powers the circuit for 4+ hours.

"Manhattan Style"! I built a shortwave radio this way once and it actually works quite well. At least you have a good ground plane!

http://www.piclist.com/techref/pcb/manhattan.htm

[smity]

The final version of the scheme, firmware, PCB ... please. We'd also like to read about the characteristics and tests.

[ashkelon]

what's the result ?

[okantex]

Hi All ,

why there is no movement at this topic,
is not there anybody who deals with this design,
I wonder test results.
does pcb works good ?
or does it still need improvements and corrections.
according to mails there must be correct pcb on the forum but it is missing.
regards
okantex

[Mustafa]

sorry, wrong post
deleted message

new pcb

i wanna build one, pls send new pcb..................
tank u

[Rov]

Yes night ,check your pinouts carefully,the circuit does work,as for the schematic ,this is layed out in schematic blocks format for sections. if u used to a complete integrated single schematic,can lead to confusion ,what goes to what ,an your eye loose track. an one error an ,no go.
i have trouble only with coil! an performance .I no good with coils! yet!an stupid mistake of own with lcd screen wiring,my own fault!