TINKERERS TIMING SCHEDULE

[Mechanic]

Hi Michael,

Have a look for sd2000 schematic and sd2000 pulse train. It is well worth studying.

The large pulse is for energising larger objects and the small pulse is for the smaller objects. Ground samples are taken after each of the pulses.

It does require constant re-adjustment in bad ground, but you don't seem to get any depth loss unlike other GB methods.

Cheers
Mick

[Jose]

Hi Tinkerer
I am interested in building the Tinkerer VI to experiment.
There is a scheme available to signal processor PIC16F690 somewhere in the forum?
Thanks
Jose

[Tinkerer]

Hi Tinkerer
I am interested in building the Tinkerer VI to experiment.
There is a scheme available to signal processor PIC16F690 somewhere in the forum?
Thanks
Jose

Hi Jose,

The Tinkerers_V_1 has many innovating and powerful features. The depth and FE discrimination is good, considering it is a PI detector. I believe I have posted all the parts on the Forum, however, since I can not delete any posts, there are many schematics that have been superseded by later ones.

Try to find the latest schematics and put a full set together from that. Once you have that,
start a new thread and post the schematics there. I and hopefully others, will then try to help you build the Tinkerers_V1.

The Schema of the signal processing board that I posted is designed for lab testing. To put it into a box it is a bit big. I advise to redesign the board.

All the best and good luck.

Tinkerer

[Jose]

Thanks Tinkerer
I will work on this, I look forward to the new ilos.
Yours sincerely
Jose

[Tinkerer]

Thanks Tinkerer
I will work on this, I look forward to the new ilos.
Yours sincerely
Jose

Hi Jose,
I looked on the forum for the MCU&TX file and could not find it. I know I posted it somewhere, but honestly the TINKERERS IB-PI forum is a mess. As a project in development, this is somehow OK, because it shows the development stages and the feedback from people all over the world, which is nice, but it means that anybody who did not follow the project from the beginning, has a hard time to put the right pieces together.

Then I looked for the EAGLE FILE on my computer and again it is a mess. I had downloaded a free trial version of EAGLE 5.10 and un-installed it after the trial time was up. Somehow I lost my schematic files in the process.

Anyway, here is a png file of the MCU and TX for the TINKERERS_V1.

Tinkerer

[WM6]

Hi Tinkerer,

can you (in short) explain idea of your TX stage again? Thank you.

[Tinkerer]

Hi Tinkerer,

can you (in short) explain idea of your TX stage again? Thank you.

IC1 is the Mosfet driver fir Q1, Q3 regulates the current in the bucking coil. The bucking coil is close coupled with the RX coil (not shown, to keep the circuit simple) the current in the bucking coil counteracts (180 degrees) the current induced by the TX in the RX coil so that the residual signal in the RX coil is reduced to a minimum.

with the TX/RX coils induction balanced at high precision, any tiny movement or changes between the coils caused by temperature, movement during potting, or shielding, or highly mineralized soil, etc. upsets the balance. Q3 is used as a variable resistor and makes it possible to readjust the induction balance.

The 1u capacitor absorbs the Flyback so that Q1 does not avalanche. During the time when the mosfet would normally avalanche, with the coil voltage at 100V to 300V I take samples. These sample give a very high response signal from the targets and also give information about FE and target TC.

Tinkerer

[Jose]

Thanks for this great project tinkerers.
I'll try to do it soon.
Jose

[Tinkerer]

Thanks for this great project tinkerers.
I'll try to do it soon.
Jose

Attached are the schematics for the MCU, TX and PS and the signal processing board once more in EAGLE format.

This power supply is very inefficient, but it works.
All parts have been tested and the full project was working fine. However, there may still be mistakes in the schematics.

All the best

Tinkerer

[WM6]

Thank for explanation, Tinkerer.

Do you know this (probably similar) not finished yet project?

http://www.lammertbies.nl/electronic..._detector.html

[Tinkerer]

Thank for explanation, Tinkerer.

Do you know this (probably similar) not finished yet project?

http://www.lammertbies.nl/electronic..._detector.html

Thanks for the link. I had looked at the project years ago, but it is interesting to revisit.

The Tinkerers_V1 uses a different principle for discriminating.

All the best

Tinkerer