Revisited the Power Test

Spent some time burning the 1 MHz bootloaders I found on the Internet. I was able to burn them but they would not upload a sketch. I could use the Arduino As ISP  to upload a sketch but the delay timing was well off. About 16x faster so a general fail for 1 MHz operation.

I had better success for 8 MHz (internal RC clock). Need only a fuse modification to use and external oscillator. Not that surprising that the 8 MHz works as it is the default for 3.3v ATMega328 operation.

Here are the current readings for 5V operation:

• 8 MHz     8.88 mA
• 4 MHz     7.05 mA
• 2 MHz     4.75 mA
• 1 MHz      4.28 mA
• 500 kHz   4.06 mA
• 250 kHz   3.96 mA
• 125 kHz    3.91 mA
• 62.5 kHz  3.89 mA

Here are the current readings for 3.3V operation:

• 8 MHz     3.35 mA
• 4 MHz     2.10 mA
• 2 MHz     1.20 mA
• 1 MHz      0.75 mA
• 500 kHz   0.49 mA
• 250 kHz   0.36 mA
• 125 kHz    0.30 mA
• 62.5 kHz  0.27 mA

Magic