Baracuda Build (silverdog kit Rev2)

[nonkapo]

Good morning all. Quick question, since you mention about LT1054. If i like to retrofit the old board with it is it plug and play swap with 7660 or i have to adjust something?
Thank you

[ionut_mtb]

Yes, the two signals are synchronized. You can see that the voltage converter oscillator pauses when the TX is on. If they were not in sync, you would not see a stable image on the scope.

I use dc measure for lt1054 osc and ac for 40106 osc. when i choose Source: alternating channels or chanel1 (40106 osc)- the reading is not clear, is unstable, like in the picture. When i choose source chanel2 ( lt1054) it looks good (or not).

[Qiaozhi]

Baracuda rev A. are this signals synchronized?
Thanks for answering.

[ATTACH]40554[/ATTACH]
[ATTACH]40555[/ATTACH]

Yes, the two signals are synchronized. You can see that the voltage converter oscillator pauses when the TX is on. If they were not in sync, you would not see a stable image on the scope.

[ionut_mtb]

By the way, it does indeed appear that the 2M2, 470nF and 1N4148 are synchronising the 7660 to the TX oscillator. This is similar to what the MPP does, in that it allows the voltage converter to use its [faster] internal oscillator, but causes it to pause momentarily during the TX pulse. Hence the internal oscillator gets locked to the TX. You can see this yourself by probing the TX oscillator with the scope using CH1, and then probing pin2 of the 7660 with CH2. The internal oscillator frequency should be around 10kHz, but it appears to closer to 7.8kHz. Apparently you can adjust the internal frequency by changing the value of the 10uF capacitor between pins 2 and 4, so it might be worth checking that out. However, I would be surprised if it would need increasing to 220uF as before.

Baracuda rev A. are this signals synchronized?
Thanks for answering.

[abdennour]

Thank you !

[Qiaozhi]

silverdog metal detector kits.[ATTACH]39563[/ATTACH]

That's the old Baracuda Legend kit. Lots of people have had problems with that design, and it has been replaced by the Geotech Baracuda Rev-A.
I suggest you read the information here -> Geotech Baracuda
before you invest too much time in the project.

[abdennour]

silverdog metal detector kits.

[Qiaozhi]

Hello everyone . I have a little problem that I hope to have help from you, I bought a metal detector kit barracuda pulse induction,When I finished the assembly and I started the test it has a problem
When the detector is placed on a table, it is stable and gives good results, And when it is in my hand and I move it, it is unstable and does not stop sounding, Yet I tried it with a shielded coil and unshielded coil And it is the same thing, You have an idea how to get rid of this parasite. thank you .

Which kit are you referring to?
Is it the original Baracuda Legend or the Geotech Baracuda?

[abdennour]

Hello everyone . I have a little problem that I hope to have help from you, I bought a metal detector kit barracuda pulse induction,When I finished the assembly and I started the test it has a problem
When the detector is placed on a table, it is stable and gives good results, And when it is in my hand and I move it, it is unstable and does not stop sounding, Yet I tried it with a shielded coil and unshielded coil And it is the same thing, You have an idea how to get rid of this parasite. thank you .

[localbug]

Pls share performance review with the updated board. Any improvement regarding sensitivity, power consumption, settings, etc?

[Qiaozhi]

i use 3x18650 li-ion rechargeable battery for my projects. doe it have any drawback using them on baracuda?


Ok, sorry, ive just read about LT1054(also replaced in silverdog new bara kit?). and yes, 18650 fully charged has 4.2v.

The Geotech Baracuda REV-A design will operate with supply voltages between 7V and 15V.

[ionut_mtb]

i use 3x18650 li-ion rechargeable battery for my projects. doe it have any drawback using them on baracuda?


Ok, sorry, ive just read about LT1054(also replaced in silverdog new bara kit?). and yes, 18650 fully charged has 4.2v.

[Qiaozhi]

so I would like if possible, someone Could help providing me These alterções in baracuda pi through photos, and other documents or even pcb print for me to build new home project or how can I make this modification on my home project alex / apberg, and rev 2.

All the details are here -> Geotech Baracuda

[homefire]

A little late on this but I buy from Tayda Electronics all the Time. Never had issues except a LCR-T4 Transistor about everything tester came in with a Messed up LCD. They Refunded and I purchased another from them. Things take about 10 or so days to get here. No Problems.

[gerson]

Hello Silverdog


Thank you for answering my message it to your sales website. I was somewhat disappointed, to receive your response. saying it does not meet Brazil to send Their pcbs and baracuda kits designs and surf pi long board.
Silverdog meets Argentina, Venezuela, Peru, Uruguay, and other countries, the Mercosur, but does not meet Brazil. In entedo why. !! But it's alright.


so I would like if possible, someone Could help providing me These alterções in baracuda pi through photos, and other documents or even pcb print for me to build new home project or how can I make this modification on my home project alex / apberg, and rev 2.


I am not aware of schemes, get a little confusso When I look at Them, but image files, and measurements in the circuit help to have success in assemblies. I am very grateful. Thank you all. [email protected]