Whites Surf PI schematic

[Frank-s]

white surf pi schematic

Thanks the schematic is different than my SMP pi

[farafero]

What value are these Potentiometers?
Volume and thresold ?
http://pics.data.bg/categories/1/%D0...5694cca4fd/asd

[Virdi_248]

Volume 1k threshold 100K

[Virdi_248]

I want to replace the speaker with headphone jack. They have to make modification to the circuit.

This is the pcb of my surf pi detector.

My English is bad sorry.

Thank you

I answer myself. Configuration used successfully in my surf pi.

[kenny444]

Hello I like your Avatar,, Did you go to Abydos ? I went to see the carvings, very interesting. Ken

[Frank-s]

Thanks
Frank-S

[yhl]

Good

[peppe30679]

Hi guys!
I am a new member of this forum (i don't speak english very well, so excuse me )
I have some problem with surf 1.2 (Silverdog): threshold is not clear and continuos, but erratic : maybe electormagnetics field in room?
I have some doubts about the correct way of mounting the buzzer........rheofore longer (+) near r35 and (-) near volume pot is correct?
Thanks!

[daverave]

you will get some interference picked up by the coil that will cause noise on the audio...make sure you screen the coil and the pcb to help reduce noise....its best to use a normal speaker than a buzzer.

[peppe30679]

Thanks Daverave!
Can i connect a simple 8 ohm speaker instead buzzer, without change anything (no circuit modifications)?

[daverave]

yes an 8 ohm speaker is ok.

[peppe30679]

I have changed the buzzer with 8 ohm speaker, but not result.
I have another question: the jumpers near IRF9640 (right-left) are needed? Then, the hole between U4 and U7 goes tinned?

[daverave]

the places you marked on the schematic are not required....if no audio then you have made a mistake or some component has been damaged...check all your soldering making sure you have not shorted out any connections or pins with solder.

[seadoggy]

hello i make Surf PI!the board work good,but i have small problem when i swing with coil to right make false signals!any idea what can be??
i using coax cable with shield my coil is also shielded!
regards

[junkhunter]

to sensitive mine does the same adjust it down a bit but also had falseing problems under water i was a dirty coil plug connection . turn all electrics off in the house very sensitive board. have no shielding in my coil just cheap 4 wire coil lead with silver shielding