SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.


Member Since: July 12, 2011

Country: United States

  • can you put the 328p chip on this board into the lowest power sleep mode (sleep mode power down) with a watchdog timer wake (once every 8 seconds), disable the ADC and the analog comparator and tell me what the power useage looks like?

    I also plan to use an Xbee. The 1mw one. But I have an idea of what to expect from that in sleep mode.

    I have always hated the voltage regulators on these systems - they take more power than the 328p chip in sleep mode more often than not - and I want to know what the power useage looks like in sleep mode.

    Was debating between one of these or making my own board - without a voltage regulator. Power in sleep mode directly relates to the battery life. I want about 1 year on a 2000ma battery. But waking only once every 8 seconds, sending a few bit of data over 20ms (well, 20ms to wake up, send data, go to sleep) plus looking at about 70 milliamps wake power, that means I need 50 microamps of sleep power to meet the 1 year goal.

    the 328p datasheet says “Power-down Mode: 0.1 μA” but thats with like everything turned off, so I know that is unrealistic.

    the xbee is going to eat 10 - 20 microamps of that up.

    I hope for a reply of “less than 30 microamps”

No public wish lists :(