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Thank you Wilson for help.
I changed 40106 and Barracuda is alive again.
But now a small question about coil. For first use i made a coil using 0.5mm wire with 200 mm diameter and 24 turns. So i get 337 uH. But the resistance of the wire is only 0.6 Ohm. Should i put a 1 Ohm resistor on the coil or what.
Ok so i made now another coil 25 cm 25 turns and works great! Thank you for all you're help Wilson. I could not do it without you. Now it is time to make housing for pcb and coil and finish my detector!
Hi silverdog put my baracud legend together and its not working no sound at all can you help out here tested all resistor and capacitors black ones that is now I am lost best w Pete
I guess you should look at my post 768, what i checked. First you see if you have +5V and -5V, than oscilator, and so on. Unfortunally i can't help you any more, becouse i+m not an electronic expert like some guys here.
Hello antonioknight, install the speaker, the coil also use a 12v battery. NOTE: use a fuse on the positive battery 1amperes.
Check the voltage of -5V +5V positive and negative pins of the integrated circuit.
Check all welds and possible short circuits on the tracks and pads. Remove fet Q5.
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