Barracuda Legend Kit Problems

[Old cart]

Try it at max delay. It still appears that the sample pulse generator is not quite right. Did you check for the shorting resistors I mentioned above? If you have then let me know and we can try to debug that circuit.

[Impulse]

yep i have checked the resistor clearances i have also tried a new 412cn 7660 5534 nothing changed the circuit is at max trim delay

here

[Old cart]

Sorry meant depth test...if you have time we can debug now.

[Impulse]

ok i have time, use a ring for the depth test ?

[Impulse]

here is the setup




with nothing changed i have 4" clear signal, 5" almost and 6" slight

[Old cart]

What are you using for a speaker? Do you run it with a threshold ( low steady tone).

[Impulse]

the speaker is the buzzer i had in the kit and yes the threshold is just before the constant tone (stable)

[Old cart]

Don't know for sure but bet a speaker would be better, maybe much better. Try to get one that is 32 ohms like this
http://www.geotech1.com/forums/attac...2&d=1430808447
high impedance headphones are an even better choice.
Maybe others can comment about what works best.

[Impulse]

i had one of these

http://www.ebay.co.uk/itm/Plastic-Sh...YAAOSwhkRWeaTj

it worked to get the board going but was junk after that so i started using the buzzer which was better.

What headphones do you suggest guys? as this is ultimately the route i want to take so if i buy some i would like to buy a 'good starter set/high impedance headphone set) which will also help with the barracuda build (difficult to get 'a' single 'best' i know) or just a speaker that you guys used/bought, where did ya get it? (32 ohm).

[6666]

Impulse after looking at your coil, what are the specs ?

[jladre]

here is the setup

[ATTACH]35348[/ATTACH]
[ATTACH]35349[/ATTACH]

with nothing changed i have 4" clear signal, 5" almost and 6" slight

Hi impulse! I suggest you to make another coil in order to optimized the barracuda power. Spiral wound, spider wave and 3dss coil is far more better. 8" - 10" diameter is good.

[Impulse]

hey guys i have made a new coil (took ages) its a spiral wound 9.8" OD 27winds 313uH (as per online calculator) i am going to test it soon but the washing machine is going and it is upsetting the hole thing.

heres a pic

[raygdunn]

What headphones do you suggest guys?

Hi Impulse,

You might try the headset off your phone or tablet to start with.

On tge Barracuda, I've wired my headset up as serial, so doubles the resistance rather than halves it. However everything I've tried has been too loud and is still a bit so after changing the audio 100 ohm for a 470. Headsets I've tested have given me 33-100 ohms for the pair. The in-ear ones were 33 ohms and loudest. Designed for lower power I expect.


Ray

[Old cart]

yes detector is working not great but is working

1k - [ATTACH]35344[/ATTACH]

Max - [ATTACH]35345[/ATTACH]

OK, this still does not look right. Put delay at center rotation.
Ch1 on 40106 pin 8 for all images, trigger off channel 1.
Take the following 5 images, include ch1 and 2 in each image at 50uS
pin 12, 2, 6, 4 then take one more shot of the last setting at 200 uS/ div.
Unless the sampling is working properly nothing also will get you max depth.

[Impulse]

ok so trigger to ch2? as i cannot turn it off?