I am planning to buy some MOSFETs for testing and playing around, to decide if I would use one instead of a BC338 transistor (see my intended application below).
My "filtering algorithm" would be:
- Small package (TO-92 preferrably);
- Small power dissipation (less heat = more light!);
- Saturated below 5V at the gate;
- Small price!;
- P channel (allows for common ground between Arduino and Led module);
- Not overengineered (my max current is not expected to go above 1A);
- Containing the proverbial "L suffix", meaning Logic-friendly;
I have been looking for a good candidate using "arduino led mosfet" search words, and tried some big-supplier sites (Mouser, Futurlec, DigiKey), but couldn't find a comparative table of Mosfet families, or even a "one place" to search for candidates to a given application, based on "layman readable" numeric parameters.
Also, if you could give me two or three part numbers that would be suitable for my application (see below), I would be glad!
Use an Arduino GPIO (5V) to switch a module of 18 red leds running at 6V. The leds are wired in nine parallel groups, where each group has two leds and one 330 ohm resistor in series. The led brightness is quite sensitive to voltage drop, so a low "ON" resistance is welcome (preferrably below 10 ohm).