BARACUDA-Legend-1

[geoscash1]

Mohandes,



I dont know which is better brother, only advice I can give is to place some specific parts, test the hec out of it then pull them out and replace with the others and test some more, trial and error seems to work the best in finding things out.... or you can check the data sheets for the specific items you mentioned and see if there are any specific differences between them and just test them out, thats all I'm doing.... I'm just an uneducated idiot that likes playing with electronics, especially trail cams and metal detectors...lol...



I finally got my cuda's 6800 cap today, replaced the 3300 with it and it seems to have changed the response in some way, seem's to be quite a bit quicker and seems to have added a slight increase (1/2 to 1 in.) in air test depth... I have more parts coming so will be testing some other things when they get here.... I neeeeeeed my wire to get here so I can get some coils done........

I wish these boards were designed with testing in mind, so they had the correct spacing for wafer plugs to fit, it would make it so much easier to test parts instead of soldering/unsoldering...

[6666]

Interesting that you noticed a change in response useing a 6800 cap.
For testing purposes you can use 2 methods
1. Use PCB pins and solder the component legs to pcb pins.
2. Cut up a IC socket that has machined pins and just plug the component legs into the hollow machined pins.

[geoscash1]

Interesting that you noticed a change in response useing a 6800 cap.
For testing purposes you can use 2 methods
1. Use PCB pins and solder the component legs to pcb pins.
2. Cut up a IC socket that has machined pins and just plug the component legs into the hollow machined pins.

Thanks 6666,
Great idea bout the ic sockets, hadnt thought of that...I have a pile of them so will give that a try on my next board.. I appreciate the advice, its great to get some awesome tips from some of you guys..

[mohandes]

my friend i dont why my barracuda weak
coil is 489mkh and 1.2ohm
another 466mkh and 2.1ohm
please help more

[satdaveuk]

my friend i dont why my barracuda weak
coil is 489mkh and 1.2ohm
another 466mkh and 2.1ohm
please help more

Hi
First off:
Are you certain that you have set up damping correctly ?
2nd: your specifications for the coil are fine, providing your inductance meter is accurate, so first of all check with a known value because that could well be your problem.
Far as using cat5/6 cable in all probability if your buying made up leads or short lengths off the net it will be cc type which will render the coil useless.
Another alternative which works well is copper tin telephone wire, which can be bought in 4,6,8,12 cores , have had very good results with it.
If any of you want quality solid copper cat5e cable then email me privately and will supply you at cost price plus postage, as I use it for work its bought in 305meter drums so its cheap.
If you want to experiment with plugs and sockets cheapest way is get hold of a modern/new scrap LCD/Plasma TV, everything you want is in there, small/large sockets, plugs, wire for your pots etc , 2 small speakers normally 8ohms, capacitors,resistors,often there is 3.5mm headphone socket, and of course the back of the TV will make you 2-3 nice bespoke housings for your projects.
All I can advise when using components both new/second hand is before assembly accurately check them, for instance a capacitor you need to not only check capacitance accuracy you also need to check its ESR value, A typical 100mfd/16V electrolytic capacitor needs to read proximately 99.92 with a ESR (impedance) of around .82, the lower the ESR and near to the capacitance required the better.
Typical off the shelf components can often read 82mfd or less with a impedance of 2.9ohms upwards which is fine in a bog standard amplifier or basic switching circuits but not in critical applications like metal detector builds.
If you don't have the required test equipment and want me to supply fully tested components then again just send me a email.
Regards

[sinclairuser]

dave, mohandes is in iran, uk customs wont clear electronics parcels to iran, some of the other lads in other countries may be able to.
iv'e tried to send stuff to iran(though not to mohandes) before but it was returned with a customs warning.

[satdaveuk]

dave, mohandes is in iran, uk customs wont clear electronics parcels to iran, some of the other lads in other countries may be able to.
iv'e tried to send stuff to iran(though not to mohandes) before but it was returned with a customs warning.

Didnt realize , thanks Sinclair dont want problems with customs

[Koala]

Didnt realize , thanks Sinclair dont want problems with customs

Doesn't make any sense. USA have lifted the ban on computers so you can export a computer but not a resistor. Look at DHL website lots can not be (or at least difficult) to exported to Iran some on the list are just strange worth a look.
http://www.dhl.co.ir/en/country_prof...s_express.html

[sinclairuser]

Doesn't make any sense. USA have lifted the ban on computers so you can export a computer but not a resistor. Look at DHL website lots can not be (or at least difficult) to exported to Iran some on the list are just strange worth a look.
http://www.dhl.co.ir/en/country_prof...s_express.html

the human factor comes into play aswell, if the customs guy is a jobsworth etc.
personally i dont see the harm in hobbyists sending bits to each other, one of those cases where the law is an ***.

[localbug]

Hello, is it possible to change the frequency of this baracuda?? I would like to change mine to 18,5khz. I have no idea which components have to be replaced and with what value?? please assist me.
excuse my bad english


regards
john

[Toros]

Hello, is it possible to change the frequency of this baracuda?? I would like to change mine to 18,5khz. I have no idea which components have to be replaced and with what value?? please assist me.
excuse my bad english


regards
john

Man, this is pi machine. It works on low frequencies. If you
want 18 kilohertz do yourself vlf detector.

[localbug]

Thanks for the input toros, but I already have a vlf machine.
yes now I believe it's kinda useless after I read more about PI machine characteristic, schematic, and diagram.
I think I'm gonna use a microcontroller to adjust multiple pulses width, delay rather than using 7660 oscillator to control the FET.

[mohandes]

Thanks for the input toros, but I already have a vlf machine.
yes now I believe it's kinda useless after I read more about PI machine characteristic, schematic, and diagram.
I think I'm gonna use a microcontroller to adjust multiple pulses width, delay rather than using 7660 oscillator to control the FET.

if you want have deeper and good detector work on Delta Pulse. it is really good. and if want work by micro-controller work on it.
barracuda is simple but it is not deeper and good like DP.
regards

[skooby]

Hi does anybody have the new schematic and instruction for the baracuda legend see i purchased it this year 2015 january im just looking for a good metal detector so i bought this kit not knowing that you need some electronic sawvy but i did put it together just cant wire it up im not sure were they go to on the pots and were they come off the board lol can anybody help me with some pictures lol of were they come off the board and connect to the pots i do have some idea how things work just cant read a schematic im good on instruction on how too. so if anybody can help me that would be nice thanks

[bernte_one]

look in another section of this Forum
http://www.geotech1.com/forums/showt...uction-details