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You can use a TT2148 power transistor-this can connect to arduino without a resistor and deal with high current.

RS2322016
– RS2322016

2016-08-31 23:19:00 +00:00
Commented Aug 31, 2016 at 23:19
Personally I'd prefer a MOSFET...

Majenko
– Majenko

2016-08-31 23:20:42 +00:00
Commented Aug 31, 2016 at 23:20
What model of MOSFET do you prefer to use?

RS2322016
– RS2322016

2016-08-31 23:25:46 +00:00
Commented Aug 31, 2016 at 23:25
That depends on many factors - current levels, switching speed and voltages, footprint, etc. I have many that I often choose between. One of my current common ones is the TSM2314CX

Majenko
– Majenko

2016-08-31 23:27:10 +00:00
Commented Aug 31, 2016 at 23:27
The TSM2314CX then. That depends on many factors-state the obvious!

RS2322016
– RS2322016

2016-08-31 23:29:27 +00:00
Commented Aug 31, 2016 at 23:29

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