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Sinking Current
Micro is a ATmega324P TQFP   I have selected a NX2301P FET configured as VSG   I am trying to switch 3.8V 1.5A from a battery to my device.   FET wiring...
Saturday, 12 March 2016 - 17:20
External Interrupt Not Reseting
Hi,   Thanks for your tips.   Now I nearly have the MCU reading the external I2C interrupt device correctly.  However it misfires sometimes for no reason.  If...
Thursday, 3 March 2016 - 16:57
External Interrupt Not Reseting
Hi theusch,   I have an I2C device that I am trying to read data from, and when data is ready is sends a low level interrupt.   INT0 is PD2 on that model, right?  ...
Thursday, 3 March 2016 - 15:05
JTAGEN New Project Issue
I am a bit lost.  The board has a 44 pin ATmega324P and I cannot remove this chip.  So I built another board with another new ATmega324P and the JTAGEN is blown again...
Wednesday, 24 February 2016 - 20:32
Low Power Wiring Confirmation
OK I will go away and crunch some more numbers and come back to you.  I am glad to see you have all been up the li-ion battery route.  I did think of going the shottky...
Friday, 29 January 2016 - 21:22
Low Power Wiring Confirmation
This is the regulator.   I think it meets those requirements.  This is all a new area to me, so I am still learning.   http://www.microchip.com/wwwprod...
Friday, 29 January 2016 - 21:13
Low Power Wiring Confirmation
  The only reason I have used an external clock is because on Microchip the internal clock used to go out of calibration with temperature and the RS232 would stop working....
Friday, 29 January 2016 - 21:06
Low Power Wiring Confirmation
Previously I had a 4MHz external crystal as my main system clock on pins 7 & 8 on the TQFP44.   In my moment of madness I thought I could swap the 4MHz for a external...
Friday, 29 January 2016 - 20:59
Low Power Wiring Confirmation
  So looking at those figures,   1) external 32kHz crystal running at 3.3V, waking up to 8MHz is OK   2) external 32kHz crystal running at 1.8V, waking up to 8MHz...
Friday, 29 January 2016 - 20:39
Low Power Wiring Confirmation
OK good information.   So my device will wake up when a motion event occurs which triggers the interrupt to process the data.  It will only be awake for about 20 seconds...
Friday, 29 January 2016 - 20:26
Low Power Wiring Confirmation
Hi,   The reason I am using the external 32khz crystal/ clock, is because the micro will not wake up from an external interrupt on the internal clock.  Have I got this...
Friday, 29 January 2016 - 19:59
Low Power Wiring Confirmation
Hi,   Currently the AVR runs at 4Mhz using an external crystal and is supplied with 3.3V, but the power consumption is to high.   To reduce my power consumption, I was...
Friday, 29 January 2016 - 19:42

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