'KROT-M' (mole), new project

[ripsdevala]

If there someone success with tepco/desalex pcb, please share, already msg the author but no reply

[horbei]

Witch PCB is the PCB of desalex? The PCB in Post 19?
When yes, there are some other misstakes in the circuit.
The TX output has no connection to the Atmega.

[ripsdevala]

Witch PCB is the PCB of desalex? The PCB in Post 19?
When yes, there are some other misstakes in the circuit.
The TX output has no connection to the Atmega.

Yes it is...


I think i need to use original dip board, just found the ingredients...

[dom44]

I have just redesigned the pc board as an all in one board with LCD and switches plugged into the back of the board based on the circuit i found could some one check it for me please in case i have errors.

[bernte_one]

hello dom44

can you upload the sprint layout files please?
rar Container should work

thanks

[dom44]

no problem just tested the atmega8 with firmware 12B on breadboard with LCD works fine

[dom44]

this is the circuit in Splan7 easier to read

[dom44]

found some errors my self could be more also tidied it up a bit

[dom44]

prototype

just built the prototype from last layout file works fine. I have an idea to run the mc34119 direct from 9v and bypass the 5v to increase range will have to try. Also found out the pinpoint is disabled in the last firmware version.


]

[ripsdevala]

just built the prototype from last layout file works fine. I have an idea to run the mc34119 direct from 9v and bypass the 5v to increase range will have to try. Also found out the pinpoint is disabled in the last firmware version.
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Nice work, test on the field dom
I will toss last setup and make your pcb. Thanks

[dom44]

the circuit diagram i posted earlier is correct check the wiring and see if it matches. I am playing with the menu system now bit tricky but working it out this detector is more sensitive than i originally thought. also if you use an 8ohm speaker parallel a 100ohm with a 1uf cap in series with the speaker for good volume.



ignore the mod diagram it is cut at the wrong point should be cut between the 100n and the choke the 9v supply is only to go to the mc34119

[moscadondres]

Hello dom44,
I am making it but can you tell me how to set R4 and R9 for the best result,thank you ,regards.

[dom44]

I am still working it out but I know you have to set your working frequency then chose the transmitter coil cap for resonance the receive coil should be set to resonate about 20 percent lower R4 is set to get the phasing right and fine tuning so you get the correct response to ferrous and none ferrous metals. the phasing is set in the firmware menu but in 45 degree steps . for R9 i used a scope and tuned to best signal

[moscadondres]

Merci dom44,regards.

[CDI]

I am still working it out but I know you have to set your working frequency then chose the transmitter coil cap for resonance the receive coil should be set to resonate about 20 percent lower R4 is set to get the phasing right and fine tuning so you get the correct response to ferrous and none ferrous metals. the phasing is set in the firmware menu but in 45 degree steps . for R9 i used a scope and tuned to best signal

Hi dom, can u plz make some short video on bench test? Thx