Question for Iconic , is this your Bara circuit

[ivconic]

First, here is how it works with CD40106 originally:

[ivconic]

Second, here is how it works without CD40106 and hooked to Arduino.
Blast! It behaves "reversible"!
Duddddeeee!!! I made Minelab Sovereign now!!!

[ivconic]

If you pay attention on details; you'll see the one of orange wires (which is GND at Arduino) is put to socket in place of pin 14. of CD40106.
And like that i got "Minelab Sovereign" lookalike behavior.
But if i take out that wire and put it in place of pin 7. of CD40106; than i get normal behavior, similar to what you can see on first video with CD40106 on place.
But in this case i can not turn delay pot too much and get proper detection in whole pot range.
Obviously this is the signal level problem. Arduino provides 0-5v range while at this version of Barracuda levels are ... in shortly WEIRD!
CD40106 is supplied inversely to provide proper signal swings to switch the fets.
This can be fixed. Funny ... i didn't pay attention on this earlier, that's why i don't recall it... and now am surprised!
Blast!

[nonkapo]

Man, that's a damn good dept with such a small coil. What about the coil data or it is sort of improvisation?

[ivconic]

Man, that's a damn good dept with such a small coil. What about the coil data or it is sort of improvisation?

It's a coil taken from old 5.25" floppy disk. Several of those at each disk.
Good for testing on the bench various things.

[nonkapo]

LoL, i know I've seeing it somewhere.... On my "Правец 16" ;-). One 360k and one 1.2m are rolling in my spare part boxes, if my wife do not throw them already. The NEC V20 project is already doomed(my father give gift my precious EGA monitor), so i just find new use for these ;-))). Thank you.

[6666]

If you pay attention on details; you'll see the one of orange wires (which is GND at Arduino) is put to socket in place of pin 14. of CD40106.
And like that i got "Minelab Sovereign" lookalike behavior.
But if i take out that wire and put it in place of pin 7. of CD40106; than i get normal behavior, similar to what you can see on first video with CD40106 on place.
But in this case i can not turn delay pot too much and get proper detection in whole pot range.
Obviously this is the signal level problem. Arduino provides 0-5v range while at this version of Barracuda levels are ... in shortly WEIRD!
CD40106 is supplied inversely to provide proper signal swings to switch the fets.
This can be fixed. Funny ... i didn't pay attention on this earlier, that's why i don't recall it... and now am surprised!
Blast!

Hi, thanks for the videos much appreciated for your time to do it, interesting result with the Arduino, I have found my old bara board but it is not in good condition so needs some work to be operational again

[MartyJ1963]

Hi all,,,Does anyone know where I can find the schematic for the Barracuda layout that Ivconic posted please? Thanks in advance.
@Ivconic,,,,CONGRATULATIONS on the EuroMag,,,I have always followed the knowledge in all of your posts and have learnt a great deal from your skills and your kindness in sharing,,Best wishes for you and the EuroMag for the future.Regards,,,Marty

[ivconic]

The "best" depends on the Compiler and what other constraints are specified.

1) is a function call so does have the overhead of pushing and popping the stack at the least. Unless the "inline function" compilier option is selected.

2) Is abstracted by macros to be understood at a high level. ie: At the 'detector functional code level.

3) Is lower level referencing directly the hardware. It is good when troubleshooting with a scope as easy to know which IO pin. But, from the Detector code view point it is not known what the pin does.

If tight timing control is required and wish to view code from the "detector's functionality" then I would use method 2.

I may be abstract this with a macro:
#define SAMPLE_C_Low DIGITAL_OUT &= ~(1<<SAMPLE_PIN_C);

Then simply put in code:
SAMPLE_C_Low;

Of course there would be a macro to set pin output high.

Yes, many ways to write code.

Even better!

#ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif
#ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif 
....

    sbi(PORTB,PB5);  // D13 High
    cbi(PORTB,PB5);  // D13 Low
...

[ivconic]

Hi all,,,Does anyone know where I can find the schematic for the Barracuda layout that Ivconic posted please? Thanks in advance.
@Ivconic,,,,CONGRATULATIONS on the EuroMag,,,I have always followed the knowledge in all of your posts and have learnt a great deal from your skills and your kindness in sharing,,Best wishes for you and the EuroMag for the future.Regards,,,Marty

It takes time me to locate it on the disk. I think i posted it in the post, somewhere on the forum.
I tried to trace out it from the pcb directly, hopefully no mistakes.

Than there is Qiaozhi's post too, here: https://www.geotech1.com/forums/show...roject-Details
It would be productive to compare those two and see if there are differences.

[6666]

It takes time me to locate it on the disk. I think i posted it in the post, somewhere on the forum.
I tried to trace out it from the pcb directly, hopefully no mistakes.
[ATTACH]47230[/ATTACH]
Than there is Qiaozhi's post too, here: https://www.geotech1.com/forums/show...roject-Details
It would be productive to compare those two and see if there are differences.

Resistor 35 is a bit of a mystery, it is shown on some circuits and not on others, it also is shown on different locations on the circuit.

[ivconic]

Not present on my working pcb, probably that's why i draw circle over it.

[6666]

Not present on my working pcb, probably that's why i draw circle over it.

Thanks, I guess the circuit works ok without that component

[MartyJ1963]

@Ivconic,,,,Thanks for the schematic,,Regards,,,Marty