Tiny Bootloader 18F2420

[Dave]

scalerobotics, WOW you pay $4.00 for an MAX-232.... You must be made of money...

Dave Purola,
N8NTA

[ScaleRobotics]

scalerobotics, WOW you pay $4.00 for an MAX-232.... You must be made of money...

No, mostly water really.

Thanks Dave, I guess I was using a Mercedes, when I could have used a Chevy.

A quick search of Digikey for MAX232 reveals the actual price of a Maxim MAX232 dip is $3.31 to $6.60 ( Unless you like the larger electrolytic caps). But, if you use an ST232C, instead of a MAX232, (after tax and a few capacitors), the cost is $1.25.

Either way, you will save some money and space on your board if you invert your coms and buy two resistors.

[Dave]

scalerobotics, There is just something wrong in my mind about connecting negative voltages to a unipolar input pin... I think the cost of a few transistors and a few resistors is worth the piece of mind....

Dave Purola,
N8NTA