Chance pi

[Mrbeen]

Hi my chance pi frequancy suppose to be 185 Hz but it is
2450hz and I don't know what is wrong ?
is it to do with program 121 or fuse bit.
Or isome thing wrong with hardware.??!!
can any one help me??

[whalefil]

Hi mrbeen , are the menu and discrimination show in lcd? if no problem in lcd its fine with micro programing
there is alot , you should check trace and line of your pcb maybe some parts are wrong or you put them wrong or maybe you have bad coil winding
it would be better if you add some picture of your completed pcb and coil then the masters of the froum help you better

regard HH

[Mrbeen]

thanks for your fast response, yes I have the venue and discrimination ,every thing looks right ,but frequenc is 2.45o khz ,
With the coil goes to 3.400khz,
I show it to some engineer ,he test it with oscilloscope
There was no since wave,
I will put some pictures,.
By the way have I made 3 of this metal detector.
Thanks your attention

[Mrbeen]

Here is short video

[Mrbeen]

Hugh frequency problem

[whalefil]

Hi mrbeen
sorry for my late response
It seem that you have another chance pcb than common chance pcb, (i look but not found it ) if you are sure about pcb and others so
ok start debugging , look at Q9 and Q3 if can you see signal? or even offset? if no look at leg of atmega 14 and 15 how about that?
regard HH

[whalefil]

There was no since wave,

Dear my friend i forget to mention that you shouldnt test with multi meter only oscilloscope can show bright pulse of the signal , and you should see pulse signal no sine wave
regard HH

[Mrbeen]

Chance pi

Hi
thanks for your help ,I am very happy that there
is some body that care about us.
Yes it is correct Persian version is little different with Russian circuit.
I will attach a copy of circuit ...
The high frequency starts from pin no 14 keeps on going to the r3
then q2,q1,r1,q3...
ok I will check q3 and q9 for signal,
I only have multimeter ( with frequence meter)at home
No oscilloscope at home !!
Thanks a lot

[Emersonpaz]

Do you have a schematic for this project?

[Mrbeen]

Chance pi

Not as such, I have this one as well that
I attached it for you,
thanks for your help

[Mrbeen]

Hi
I test the frequency of my detector with few different multimeter and
Multimeters and two oscilloscope,
I had three diffrent readings ,some showed around 2.5HZ and some showed
2.5. KHz. , Unity brand multimeter showed 98HZ.
Wondering world !!!
Surprising!!
I don't know which one is correct?