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key fob batteries
I was wondering how the battery in my Mini Cooper key fob has lasted more than 10 years.  I found a uTuber video showing how to replace the battery, which is said to be...
Friday, 22 May 2020 - 19:20
ejecting Atmel ICE
I have been just unplugging USB from my Atmel ICE, but I noticed in Windows 7 I have the option to eject it before unplugging.  Does anyone have an opinion about ejecting...
Wednesday, 13 May 2020 - 19:39
bizzaro interrupt behavior
I am using a Ti LED controller that has an XERR pin that according to the data sheet is an open drain transistor that is normally off that I am pulling up with a 100k resistor....
Sunday, 3 May 2020 - 22:50
Pi driven relay
A friend of mine is driving a low current relay coil directly with a gpio pin on a Raspberry Pi.  The circuit is Pi pin to relay coil + pin.  Relay coil - pin to ground...
Thursday, 12 March 2020 - 02:56
frozen batteries
I store new batteries in the freezer.  A friend of my wife's said she had a bunch of Duracell AAA dated 2022-2025 in the freezer that leaked.  She said she got them from...
Sunday, 5 January 2020 - 18:55
Atmel Studio 7.0.2389
I just upgraded to the latest version of AS7 - Version 2389.  Has Anyone had any trouble with this version.  I'm hoping it fixes one of the display bugs I keep seeing.
Wednesday, 23 October 2019 - 15:48
Win 7 updates and AS7 slowdown
I installed the recent Windows 7 updates and now it take about 5 minutes to open an AS7 project, and a build that used to take 10 seconds now takes much much longer. ...
Sunday, 15 September 2019 - 01:41
reflection in PCB traces
I know I am not supposed to have right angles in PCB traces, and all the PCBs I have seen use two 45 degree bends to make a 90 degree change in direction.  I also seem to...
Wednesday, 11 September 2019 - 16:16
ATmega128 old age
Not only am I getting old, but the ATmega128 in my cat feeder is getting old.  The mega128 and the RFID circuit I built have been running continuously for about 5 years....
Saturday, 6 July 2019 - 06:43
I2C pull up resistor location - Split from Weird signals on SDA/SCL pins for I2C
jgmdesign wrote:EDIT:  The resistors must also be at the last device on your bus.  Not at the microcontroller. Hi Jim, Is this really really important?  I have been...
Thursday, 4 April 2019 - 16:23
I discovered the ATmega1284P's use JTAG for debugging instead of debugWire, although the data sheet mentions debugWire.  The JTAG connector on my ICE is 0.050 pin spacing, so...
Saturday, 2 March 2019 - 23:18
115200 baud UART
I have been having trouble talking to 16MHz mega's at 115200 BAUD.  Talking to a PuTTY window through an FTDI USB-serial chip gives me garbage on the screen, if anything at...
Monday, 11 February 2019 - 01:51