Malysh FM

[Altair]

Good homefire
Mine is a little bit different, it's FM2 V2 version.
Tomorrow I would check with oscope what happen inside...

[homefire]

I got this one working on vero board.

Started PCB but not tested.

Have Hex

MetFM2_675_Fast.zip

[Altair]

Hello nick holas,
have you fix the problem?
I have remastered the MalishFM2 V2 but my version not work also!
No sound, only some blink on leds.
I have checked the master and it is OK.
PIC seems well programmed.
Boh?!?

[gudya]

https://youtu.be/u8QYl2R6aDQ

[nick holas]

rhaaaaaaaaaaaa!!!!!!!!!!

hi toros
hi all
i ve flashed the pic with new firmware it works on the first i ve made (the upper one) but not with the other (long pcb and propointer shaped)
so rhaaaaaaaaaaaaaa!!!!!! i don t know why!!!!!!!!
i have 3.5v on twice pcb pin 1 of the pic and thats all
join some photo

[nick holas]

hi toros
thanks for your interest
sorry i made mistake, i ve erased the t1 transistor but only in layout i placed it correctly on pcb ,i m going to burn an other pic with hex file again maybe it ll be the soluce?????
i will tell you the frequency after that (i haven t my pickit2 on hand, i have lended it at a friend)
thanks again will give you some news early

[Toros]

nick holas,
I see your long PCB was prepared under the scheme ver. 2. I see no reason not to board work. Check whether transistor T1 is set correctly as below. On your plate not shown its location. There was little difference in the inductance of the coil, but it can not cause the detector may not work.
Are you sure that the processor is programmed with the correct hex file.
What frequency measuring pin 5 of the CPU.

[nick holas]

hi toros
made first this pcb (grey ,not mine) and works good with good sens (i use it in pinpoint with ferrite core coil)
then after this i made an other pcb inpired by the first to fit inside small pvc pipe diam 20mm and..... don t work!!!!!
exactely the same componant ,same coil perhaps i made mistake in pcb routing???
some one may have look?
thanks

maylashv4.zip

[Toros]

Nick, please put here your .lay file (RAR), having previously put the T-4 in his place, as his mount it on board.

[ripsdevala]

Hi torros hi all
I vé allready made this métal détector with good results as pinpoint with another pcb design ans with exactily thé same component one work ,long pcb board don t
I vé vérifiéd and reverified my long pcb and it might be good according to schéme!!!!!!
Don t understand what happend
Any ideas???

Its work on the soil!??
What version do you made?

[nick holas]

Hi torros hi all
I vé allready made this métal détector with good results as pinpoint with another pcb design ans with exactily thé same component one work ,long pcb board don t
I vé vérifiéd and reverified my long pcb and it might be good according to schéme!!!!!!
Don t understand what happend
Any ideas???

[Toros]

[QUOTE=nick holas;223256]hi all

but it s always mute!!!!

What you use speaker or piezo buzzer. If you use a piezo buzzer it must be without built-in generator. The resistance of such a buzzer is infinitely large. For this between it's two legs you can put resistor 1k or 2k and then gets sound.

[ripsdevala]

Check your led orientation, i hope your built will work on the soil/ground.

[nick holas]

hi all
thanks TOROS for the pointing ,the grounding is made by the connection with the switch ,i grounding it directly to simplify and i have now 3.4-3.6 v !!! good!!!
but it s always mute!!!!
normaly there a sound of setting coil (small bip then 3 tone)
i will erase chip and reburn it perhaps?????
have you pointed another mistake on pcb??
thanks

[chevesne]

The value of inductance 2290uF make me take a scheme for the other.