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Classic atmega which supports TWI/I2C fast mode plus 1MHz speed ?
Heisen wrote: I am using Peter Fleury I2C library. It has 3 files.   i2cmaster.h i2cmaster.s twimaster.c   Right now I am only using .h and .c file. For bit banging...
Tuesday, 10 December 2019 - 01:22
Having problems getting my boards to program! Hardware issue? AtMega8
Goldiedpimp wrote:Is there any reason that's there?    To reduce sensitivity to electrical noise.   Try it without the capacitor. If that solves the problem, try...
Thursday, 5 December 2019 - 23:00
Having problems getting my boards to program! Hardware issue? AtMega8
C1 is a 10uF cap from Reset to Gnd. Remove this capacitor - it interferes with the programming.
Thursday, 5 December 2019 - 21:59
Bootloader, OS-X, avrdude, 2560, Olimex.
redken wrote:Experimenting with a USBasploader type bootloader for a standalone 2561 project but testing on an Arduino MEGA.   The Arduino IDE uses avrdude to program the...
Thursday, 5 December 2019 - 21:22
Measure Vcc with ADC
Have you tried slowing the ADC clock to see what effect that has on the accuracy?  
Wednesday, 27 November 2019 - 11:39
Generate multiple HEX files with compile time as hard coded as serial number.
Pratik Suthar wrote: it might be problematic to use __DATE__ and __TIME__ when you are planning to provide updates.   If the chip is updated via a bootloader, then you could...
Monday, 18 November 2019 - 10:33
Tool chain disaster
From post #16:   AVcc (pin 20) should be connected to Vcc,  Gnd (pin 22) should be connected to Gnd, and a 0.1uF bypass cap should be connected between AVcc and Gnd....
Saturday, 16 November 2019 - 19:36
AVRDUDE Initialization rc=-1 failed on new chip
In the avrdude command line you have: -B 250which specifies a clock period of 250 microseconds which equates to 4KHz clock. Is that what you wanted?  
Sunday, 10 November 2019 - 07:50
AVRDUDE Initialization rc=-1 failed on new chip
You have the MISO, MOSI, and Reset pins from the ATtiny45 and the ATmega328P connected together and to J1.   Remove the ATtiny45 and see if you can then talk to the 328P...
Sunday, 10 November 2019 - 04:22
flaky avrdude operation with arduino micro on linux
MattRW wrote: avrdude -v -p m32u4 -c avr109 -P /dev/ttyACM0 b -b 115200 -U flash:w:main.hex -V   You have: "flaky avrdude operation with arduino micro on linux" Does the...
Sunday, 3 November 2019 - 00:08
USBTinyISP and Atmega328P-PU Problem (SOLVED)
I don't see any 0.1uF bypass capacitors from the Vcc and AVcc pins to the nearby Gnd pins.   Edit:  What is the value of the resistor from Vcc to the Reset pin? ...
Thursday, 31 October 2019 - 02:35
Atmega328p vs Atmega32
yoman91 wrote: the fuses set to work with external capacitor. What does that mean - external XTAL?   yoman91 wrote: I power it from a power bank What voltage? What capacitors...
Monday, 21 October 2019 - 09:28

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