I have AVR : at90usb62 that receive USB voltage
In the beginning I connect the relay to the AVR.
In the moment that the AVR rise to 1 logy (5 Volt) the relay is open and the AVR stop to work
Apparently the amperage that the relay need is bigger than the maximum AVR can give that is 40Ma
After I decide to use a 2N2222A transistor that will cope with the amperage
I connect the emitter to the ground
The basis through a resistor of 1K ohm to the AVR and the collector to the input of the relay to 5 volt that is the voltage supply from the AVR that came from the USB
Again all work fine until I rise up the leg to "1" logy then the relay is open and the AVR dead again
Apparently the AVR is taken a lot of amperage I am surprise because the USB need to supply up to 0.5 ampere
I put the diode across the relay to prevent reverse amperage for the transistor
I was tried to use solid state relay and the work fine (I connect the relay straight to the AVR)
The problem is that the solid state relay never completely disconnect therefore when the relay was disconnect the florescent hat was connected to the solid state relay continue to flash and this effect is not desirable and short the life of the florescent
I connect the emitter to the ground
The basis through a resistor of 1K ohm to the AVR and the collector to the input of the relay to 5 volt that is the voltage supply from the AVR that came from the USB
Again all work fine until I rise up the leg to "1" logy then the relay is open and the AVR dead again
Apparently the AVR is taken a lot of amperage I am surprise because the USB need to supply up to 0.5 ampere
I put the diode across the relay to prevent reverse amperage for the transistor
I was tried to use solid state relay and the work fine (I connect the relay straight to the AVR)
The problem is that the solid state relay never completely disconnect therefore when the relay was disconnect the florescent hat was connected to the solid state relay continue to flash and this effect is not desirable and short the life of the florescent
Therefore I beginning to search after mechanical relay that take less amperage
I enter to Farnell and search relays, Power General Purpose
And I receive this table
And I receive this table
http://export.farnell.com/jsp/search/browse.jsp?N=500006+1002725&Ntk=gensearch_001&Ntt=relay&Ntx=mode+
now I want to understand all columns in this table to find a relay that use less power that I have
I will glad to receive help