Arduino and mosfets

Question

Hello,

I am looking to use an Arduino to control switching across many relatively high voltage, high amp connections. I know I can use a power mosfet (like IRL540PBF ) to isolate the microcontroller from the high power supply, but i have 20+ points which i need to switch this applied power between.

Does anyone know of a reasonable (and cost effective) way to avoid having to connect 20+ power mosfets?

Basically I want have say 5A running through points 1-20+ consecutively based on a serial binary output from one of the Arduino pins.

R_Phoenix · Answer

The Mosfets is probably the most cost effective. You could use relays, but that's even more costly plus you would need to use a small relay to controll a power relay. This MOSFET is a bit cheaper and IMO better http://www.mouser.com/Search/ProductDetail.aspx?R=FQP30N06Lvirtualkey51210000virtualkey512-FQP30N06L It is only a 0.027 RDS and can handle 30 amps with the proper heat sinks.