felezjoo PI(the best pulse induction metal detector that I made until now)

[faycel]

another question please
why not to add a resistor between negative line and the gate of IRF840. 10k for exemple
to prevent floating situation of the mosfet (miller effect)

[Altair]

Hi,
I tried to program atmega 328p with AVR Studio 7 and AVRISP MKII programmer but I have some problems with fuses bit!
These are setting I used:
- Low fuse: F7
- High fuse: D1
- Ext fuse: FC

After writing fuses, the atmega is not more recognized from the programmer; it' seems to became bricked!
Already two chips are dead on my hands until now!

Are there someone who has used AVR Studio 7 with success? How?

[basellafe]

why you dont try avrdudes its perfect with atmega ihave programed with it several time with no problem i use arduino isp

[Altair]

why you dont try avrdudes its perfect with atmega ihave programed with it several time with no problem i use arduino isp

Thank basellafe for your help.
Meanwhile I have understand by myself: the two chips was not bricked; there was missing the quartz on my programming breadboard!
In fact, with original fuses setting, the Atmega works with internal oscillator but when I have wrote new fuses setting I tell it to use the external oscillator --- without --- having the quartz!!! ARGHHH!!!
I add the quartz and now everythings is OK!

[basellafe]

Thank basellafe for your help.
Meanwhile I have understand by myself: the two chips was not bricked; there was missing the quartz on my programming breadboard!
In fact, with original fuses setting, the Atmega works with internal oscillator but when I have wrote new fuses setting I tell it to use the external oscillator --- without --- having the quartz!!! ARGHHH!!!
I add the quartz and now everythings is OK!

[faycel]

why you dont try avrdudes its perfect with atmega ihave programed with it several time with no problem i use arduino isp

arduino isp and atmelstudio is the best

[qurashimoin]

What is the alternate of LF357N and BS170.

[samii]

try lf356 and 2n7000.

[lc516]

I have created different coil（20cm，40CM ,1*1M cable), all is not working on A300 B700 C800

usually well under A200 B400 C550

I don't know what the problem is.

Who has same problem with me

[basellafe]

change ic357

[basellafe]

ivica about r5 what jop it do

[Prospekteur]

I have a question about discrimination of felezjoo. How good is iron reject in ground? Do you need double d coil for discrimination as you need with the minelabs.

Can be that the answer is written in one of the 59 sites before.....i dont want to read all sites for now...:-D

[chafik]

error in pcb made by sprint layout typon 2 and 2 variants of this with isp are shorted

[ripsdevala]

error in pcb made by sprint layout typon 2 and 2 variants of this with isp are shorted [ATTACH]39641[/ATTACH][ATTACH]39642[/ATTACH]

Your R5 still use 10k it should 2.2k

[ripsdevala]

I have a question about discrimination of felezjoo. How good is iron reject in ground? Do you need double d coil for discrimination as you need with the minelabs.

Can be that the answer is written in one of the 59 sites before.....i dont want to read all sites for now...:-D

Rejection is good, as long not above vulcanic soil or iron sand terrain.