moraces da proveris na plocli ali treba da je ovako
JD-VCC je +5V koji idu na namotaj od relea. Vcc je 5V sa tvog kontrolera / stekera
koliko vidim sa slike on tu ima optokaplere i trandzu tako da tvoj kontroler samo otvara/zatvara optokaplere, opto onda okida rele preko externog trandze.
idealni setup je da ti na JD-VCC dovedes EXTERNIH 5V tako da relei ne trose tvoje napajanje vec rade na externo ... malo je plocka sumanuta posto je i dalje ground zajednicki ali sa ovim optokaplerima ubijaju smetnje (pod uslovom da si doveo JD-VCC externi!) koje idu preko 5V .. smetnje preko GND-a se i dalje propagiraju nazad .. bilo bi mnogo iskusnije da su stavili i jumper za JD-GND ali ..
dakle taj jumper sluzi da ako neces da dovedes externo napajanje nego hoces relee da napajas sa istog napajanja onda zabodes taj jumper i prespojis JD-VCC i VCC
sto se struje tice, max struja koju mozes da povuces sa usb porta je 500mA (u idealnom slucaju)
sto se samog atmela tice
Citat:
Although each I/O port can sink more than the test conditions (20 mA at VCC= 5V, 10 mA at VCC= 3V) under steady state conditions (non-transient), the following must be observed:
ATmega48PA/88PA/168PA/328P:
1] The sum of all IOL, for ports C0 - C5, ADC7, ADC6 should not exceed 100 mA.
2] The sum of all IOL, for ports B0 - B5, D5 - D7, XTAL1, XTAL2 should not exceed 100 mA.
3] The sum of all IOL, for ports D0 - D4, RESET should not exceed 100 mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test condition.
Although each I/O port can source more than the test conditions (20 mA at VCC= 5V, 10 mA at VCC= 3V) under steady state conditions (non-transient), the following must be observed:
ATmega48PA/88PA/168PA/328P:
1] The sum of all IOH, for ports C0 - C5, D0- D4, ADC7, RESET should not exceed 150 mA.
2] The sum of all IOH, for ports B0 - B5, D5 - D7, ADC6, XTAL1, XTAL2 should not exceed 150 mA.
If IIOH exceeds the test condition, VOH may exceed the related specification. Pins are not guaranteed to source current greater than the listed test condition.
dakle pri sorsovanju (izlaz 5V) pojedinacno pin moze da da max 20mA a svi pinovi zajedno za portu C i D ne smeju da budue preko 150mA, i B+D port isto
pri sinku (izlaz 0V) ista prica, max moze 20mA (ne znam odakle ti tih 40mA) ali zbirovi ne smeju da predju 100mA
inace pogledaj jos jednom tu plocku, koliko ja vidim arduino ovde samo pali/gasi OPTOKAPLER znaci 5mA ili tako nesto mu treba, on ne pali/gasi preko svog pina coil relea!!!!