In SX Microcontrollers, SX/B Compiler and SX-Key Tool, william wrote:

I went to megasuirt.com and saw the Megasquirt II ECU running at 24Mhz.
Why don't we decide on a 3 pin thru hole resonator, so we can use 20 or 50Mhz later depending on personal preferences.

Are the injectors common positive ( common anode )?
If it is, then the IRL510 is beautiful, b'cos it pulls the other injector pin to ground.
If they are floating, the IRL510 will also do.
If they are common ground, we need to change to a p-type mosfet.

BennettDan,

Even though the 7805 regulator can handle up to 1 amp, it needs plenty of heat sink.
To handle even 500mA, dropping 13v to 5v, it will heat at 4 watts !
From my experience, it can only handle up to 150mA without heat sink in tropical countries.

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