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

[Tahabns1]

Hello everybody, Am your friend taha from Tunisia. I have the felezjoo with all his model of this great machine, For you, who HAD this " COIL ERROR " this is simple use potentiometer 5k or 10k instead of R11 390 ohm. Using the potentiometer with clicking Down button, felezjoo read the coil, slightly try to fix the Super number ABC then restart the box.

[zakari]

hi folharin
you can re-programing the same atmega no need another

best regard
zakari

[folharin]

i used usbasp and avr dudess

[folharin]

I was in the middle of recording atmega and I think there was an error in the compilation.my doubt is if i can re-record in the same atmega or need to buy another new one?
Eu estava no meio da grava??o do atmega e acho que ocorreu um erro na compila??o

[Qiaozhi]

este hilo est? muerto parece que COVID-19 ha ganado la batalla !!!

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[Ruben2000]

este hilo est? muerto parece que COVID-19 ha ganado la batalla !!!

[Ruben2000]

[Ruben2000]

I have not been able to get the original LF357N and I am testing it with a Chinese one and I had to use the IRF740 because the IRF840 burns out. I am still a beginner at this.

[Ruben2000]

ACHO QUE MEU USBASP ? FALSO CHIN?S

to be able to record correctly you have to install the AVR DUDE program correctly

[Ruben2000]

to be able to record correctly you have to install the AVR DUDE program correctly.

[Ruben2000]

https://youtu.be/iVaiYf8QuuQ

[AK48]

Principle

The tantalum capacitor is a gelled or solid electrolyte capacitor whose dielectric is a thin layer of tantalum oxide (Ta 2 O 5 ), a refractory metal whose transformation takes place by sintering at very high temperature. Compared to aluminum, tantalum oxide has a permittivity of 26 (8.5 for alumina) which makes it possible to produce capacitors of smaller volume with identical capacity, very reliable, robust and usable between -55 and + 125 ? C
There are several technologies for producing this type of capacitor:
- strips of tantalum laminated and wound in the conventional way
- capacitors with sintered anode and solid electrolyte (manganese dioxide)
- capacitors with sintered anode and gel electrolyte
In this last model the anode is a block of very fine tantalum powder agglomerated by sintering electrically separated from the cathode (the electrolyte: sulfuric acid or lithium chloride) by the thin film of insulating oxide (Ta 2 O 5 ). The negative electrode is made up of the silver casing which contains everything and must be chemically resistant to the electrolyte.
The thickness of the dielectric is very small: a few nanometers for a low voltage capacitor but its surface area is very large due to the granular structure of the anode (see Capacitors: different types of dielectrics ).

Use and characteristics

Due to its small size and large capacity, the tantalum capacitor tends to replace the aluminum electrolytic capacitor. It is found in LF as a connection and decoupling capacitor. As its leakage current is low and its capacitance stable and precise, it is also used in timing circuits.
Standardized operating voltage: 6.3 to 125V, beyond 85 ? C it gradually decreases
Polarization: Like aluminum electrolytic capacitors, tantalum capacitors can be damaged if plugged in backwards. There are models which withstand a few volts in reverse and non-polarized models which are in fact two polarized capacitors mounted in series and in opposition.
frequency range
Up to a hundred kHz, the capacitance does not vary with frequency. then it decreases very clearly. A 22?F capacitor from 1 to 100kHz will only make 1?F at 2MHz Leakage
current : a few ?A due to the impurities contained in the tantalum powder
Temperature range : -55 ? C to + 125 ? C
Capacity range : commonly a few ?F to several tens of mF
Tolerance: minimum 10% for models with liquid electrolyte and 5% for models with solid electrolyte
Losses : fairly high, tg ( d ) ranging from 0.05 to 0.8
Lifespan and reliability : very favorable especially for models with solid electrolyte

[ricalbertvig]

is there a difference in using electrolyte instead of tantalum 100 uf? I tested with tantalum and electrolyte and the behavior is the same .. because the author recommends using tantalum 100 uf? .. how can it affect using electrolyte? Greetings ,,, I await a response from someone knowledgeable on the subject ..

[Qiaozhi]

ACHO QUE MEU USBASP ? FALSO CHIN?S

English?

[folharin]

ACHO QUE MEU USBASP ? FALSO CHIN?S