Hi, I want to use my AC wall transformer (120v -> 21V), 'plugged into' a rectifier (21V -> 19V) into a LM317T power regulator (19V -> 5V) to power a microcontroller.
Will a heat sinks like so suffice for prolonged use?
http://www.ebay.com/itm/400275309095
Average current will be 100mA to maybe .900, won't exceed 1A ever.
Power dissipation ~ (19-5)V*500mA = 7W (this is where i'm becoming doubtful of a small heat sink being able to dissipate 7W)
Rectifier is rated at 400V, 1.5A
Regulator rated at 40V, 1.5A
Transformer rated at 240VAC, 10A (not 100% sure about the amp rating but I remember it was in the teen area).
Also, this may seem stupid, but I am just getting into digital logic, but...
a) can integrated circuits (NAND,AND,NOR,.. gates) be powered with AC?
b) what is the voltage drop on these integrated circuits? can't find any information on the datasheets.
and, any good guides on how to connect to the internet using a microcontroller? Atmega32a is what I am using.
Thanks, I appreciate the help.
Will a heat sinks like so suffice for prolonged use?
http://www.ebay.com/itm/400275309095
Average current will be 100mA to maybe .900, won't exceed 1A ever.
Power dissipation ~ (19-5)V*500mA = 7W (this is where i'm becoming doubtful of a small heat sink being able to dissipate 7W)
Rectifier is rated at 400V, 1.5A
Regulator rated at 40V, 1.5A
Transformer rated at 240VAC, 10A (not 100% sure about the amp rating but I remember it was in the teen area).
Also, this may seem stupid, but I am just getting into digital logic, but...
a) can integrated circuits (NAND,AND,NOR,.. gates) be powered with AC?
b) what is the voltage drop on these integrated circuits? can't find any information on the datasheets.
and, any good guides on how to connect to the internet using a microcontroller? Atmega32a is what I am using.
Thanks, I appreciate the help.