Whites Surf PI schematic

[kt315]

do we have to open new thread where we will teach everybody by simplest basic electronics? who will pay our job in internet?

[plinio]

why should it be used stacked polyester film capacitors on Surf pi??

[bernte_one]

49 Pages and more Infos included in this Thread as in the whole world wide Web an you can't find an Info Here? See some Lines above there is the field 'search this Thread' try this an Type the Word coil there.

[peyman 74]

hi
what is the best coil for surf pi؟ and specifications?

[kt315]

Yes, build a fast coil of spiral design. Use enamel wire 0.4 to 0.6 mm. 30 turns. You will see big gain in depth of 3 to 4 inches more. Shield the coil. Use Tl072 .

fastest basket coil. two-stage front amp with Eric's 5us STROBE DELAY. controlled PULSE WIDTH.

[nonkapo]

Are you using tl072 instead of 5534???? It sounds not a good substitute to me. Are you changing the passive elements when doing this?

[dbanner]

Yes, build a fast coil of spiral design. Use enamel wire 0.4 to 0.6 mm. 30 turns. You will see big gain in depth of 3 to 4 inches more. Shield the coil. Use Tl072 .

[kt315]

i think i must be working in swett home Whites to make surf stronger. but my recent job...
you know this situation - you need a dirty job to elementary survive in this mad world.



pleasure
Anatloy

[peyman 74]

hi to all.has someone a solution to make surf pi stronger??

[blacktaci]

[QUOTE = Qiaozhi; 258199] L?tfen forum kurallarını okuyun -> Forumların Temel Kuralları
ve yayınlarınızı İngilizce yapın . [/ QUOTE]

Thank you Qiaozhi

[Qiaozhi]

[QUOTE = Dirceu'nun; 95350] Merhaba! NELSON


Off-trimer'ı ayarlıyor musunuz?
Manyetik kulağımı 1 kpF (orijinal şematikte C9) yerine bir piezo ve 220pF kapasit?r ile değiştiriyorum.
Benimle ilgili t?m hedef mesafeleri nihai ses algılamasını ifade eder (sadece k???k bir "tıklama").

Saygılarımızla,
Dirceu. [/ QUOTE]
220pf ?alışmıyor.

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[blacktaci]

[QUOTE = Dirceu'nun; 95350] Merhaba! NELSON


Off-trimer'ı ayarlıyor musunuz?
Manyetik kulağımı 1 kpF (orijinal şematikte C9) yerine bir piezo ve 220pF kapasit?r ile değiştiriyorum.
Benimle ilgili t?m hedef mesafeleri nihai ses algılamasını ifade eder (sadece k???k bir "tıklama").

Saygılarımızla,
Dirceu. [/ QUOTE]
220pf ?alışmıyor.

[nonkapo]

I've checked the surf yesterday, stand by current was around 50ma. When target detected it goes 65-70 depending on the strenth of the signal. Will try later putting CMOS timer to see how much difference it will make. As per the Cuda i cant say - still working on it but from what i remember 7660 maximum current was 100ma, same as 78L05 isnt it? So it get screwed both the ways:-)

[Andi68]

I totally agree with you

[Qiaozhi]

But the Baracuda also draws much more power than the surf, I measured 120mA, and I think that kills the 7660 even more

The 7660 is only used to generate a negative supply, and the switching current is drawn directly from the battery, so the load on the 7660 is minimal in comparison to the total current. The problems that kill the 7660 are described in the Geotech Baracuda Rev-A Build Document. But this is the wrong thread to be commenting on the Baracuda.