SurfMaster Performance

[bernte_one]

My real-deal surfmaster needs the Tuner control to be adjusted so that you hear a background "motorboating" tone for most sensitivity. The manual calls it a "click".
I'm curious where this repetitivity really comes from, but I don't hear that in your video.
Do you use 10 cells? Are they Alkaline? New ones would put you then over 15V but maybe the internal resistance drops that down?

Barry

The clicking sound is one of my problems. I dont get a clicking nobody can help me with it, ApBerg means i have to check my caps !?. Maybe it is a problem of my potentiometers (wrong wired?). I take Eneloop AA Akkus loaded they have 1,3V per piece. When i measure them at block they have more than 12v. IF more people would upload their videos it wouldbe easier to compare the function.

Here are some pics maybe you can se something wrong?
http://fotoalbum.web.de/gast/bernd.marten2

The bridges besides IRF left and right are extra wired now.

B.

[ApBerg]

Hello Bernte,

There is no clicking sound in the Surf, but you must get some sound from around 660Hz if you tune up the treshold/tune potentiometer. And yes check your potentiometers wire's .
I saw the video you made, is there no iron in your floor ? this has influence on testing!

The coil is ok I think, so you are on the right way...

Succes.

Ap

[bklein]

The clicking sound is one of my problems. I dont get a clicking nobody can help me with it, ApBerg means i have to check my caps !?. Maybe it is a problem of my potentiometers (wrong wired?). I take Eneloop AA Akkus loaded they have 1,3V per piece. When i measure them at block they have more than 12v. IF more people would upload their videos it wouldbe easier to compare the function.

Here are some pics maybe you can se something wrong?
http://fotoalbum.web.de/gast/bernd.marten2

The bridges besides IRF left and right are extra wired now.

B.

Try using a TLC555 (CMOS) timer instead of the NE555. Way less operating current and no current spike on the supply during transitions. Not sure it makes any difference other than battery life though.

[bernte_one]

Try using a TLC555 (CMOS) timer instead of the NE555. Way less operating current and no current spike on the supply during transitions. Not sure it makes any difference other than battery life though.

i have the TLC555 here already tested- makes another sound, maybe i should test it again together with the MC14093

[Wiltran]

1.Bernte One, which one give you the best (depth) results?


HCF4093BE
HEF4093BP
MC14093BE

2. I disconnected the 1W damping resistor, and substituted a 1K pot, to improve my depth on coins. It ended being about 500 ohms. I built the oxygen board.

[bklein]

1.Bernte One, which one give you the best (depth) results?


HCF4093BE
HEF4093BP
MC14093BE

2. I disconnected the 1W damping resistor, and substituted a 1K pot, to improve my depth on coins. It ended being about 500 ohms. I built the oxygen board.

What do you mean "oxygen board"?

[bernte_one]

@Wiltran best results i have with MC14093

i build the long bord version from ApBerg design and produced by Silverdog (great work)

the oxygen board ( single sided) is in work maybe finished this weekend

i think it is god to replace the damping resistors with a poti so u can use different coil
but i gues it is possible to overheat some part with wrong tuning???

[Wiltran]

@Bernte one. I checked the heat of surrounding parts as I was adjusting pot, and I didnt get any overheating. I ended up soldering in 2- 1/2 W 250 ohm resistors that get slightly warm. The silver dog board looks nice but I make my own boards, and Oxygens board was well layed out and fit my size requirements nicely. According to the data sheets. it seems that the hef4093 is faster than the hcf4093. Did you really achieve greater depths with the MC14093BE?

[Qiaozhi]

@Bernte one. I checked the heat of surrounding parts as I was adjusting pot, and I didnt get any overheating. I ended up soldering in 2- 1/2 W 250 ohm resistors that get slightly warm. The silver dog board looks nice but I make my own boards, and Oxygens board was well layed out and fit my size requirements nicely. According to the data sheets. it seems that the hef4093 is faster than the hcf4093. Did you really achieve greater depths with the MC14093BE?

It's not the other components that will overheat, but the pot itself. If you use a pot without a suitable series resistor (for example, 220R) it could burn out when turned to the low resistance end of the scale.

[Tec]

Yes, I would say, get rid of the shield.

[taliesin]

Yes, I would say, get rid of the shield.

do you you use it without a shield ?

[taliesin]

Hello WesP,

please post the ics you have build in.

I think it`s the problem like the one that i have with my surf pi.

http://www.geotech1.com/forums/showthread.php?t=17121

i have similar bad performance

maybe it come from the Latchup effect ???

http://www.elektronik-kompendium.de/...rer/anasw2.htm

translate by youself

if i used the HCF4093BE instead of HEF4093BP the range falls from 15-18cm for 2Euro to 5-10cm could be this problems are too with other ics i have build in?

i post a peformance video if mine at youtube
For coil information click on "weitere informationen" further informaton at video

http://www.youtube.com/user/BernteOn.../0/yUqz6Y1sI_w

@ dfbowers
can post or link some pictures of your coils with datas

i tried several coils from 13cm till 30cm with differnt inductance etc but i can#t reach such range like you
mybe your coils a totally different or my board is build wrong from me
http://fotoalbum.web.de/gast/bernd.marten2/Surf_Pi

thx

i tried 4011 instead of 4093 seems better

[bernte_one]

thanks for tip with 4011 i will try tomorrow after i visit my local electronic store

nice rest weekend