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Pulsing common ANODE LEDs via PWM
Hi,   I've bought a bunch of RGB LEDs, and based on the attached diagram, it looks like the LEDs are common ANODE.  I am looking to use an ATMEGA328 just to try out if I...
Saturday, 29 November 2014 - 17:24
XTAL1 and XTAL2 questions
Hi, Up until now with AVR devices, if I want high F_CPU freq for my AVR device, I would attach a crystal to the XTAL1 and XTAL2 with a couple 22pF caps. I've seen CPUs/MPUs, like...
Friday, 5 September 2014 - 15:09
Having one heck of a problem with JTAGICE mkII + ATMEGA8
Hi, I am trying to use the JTAGICE mkii to program the ATMEGA8 via ISP. AS61 recognizes the JTAGICE mkii programmer, but it can't or I can't set the voltage, which is stubbornly...
Wednesday, 3 September 2014 - 18:39
Having one heck of a problem with JTAGICE mkII + ATMEGA8
Hi, I am trying to use the JTAGICE mkii to program the ATMEGA8 via ISP. AS61 recognizes the JTAGICE mkii programmer, but it can't or I can't set the voltage, which is stubbornly...
Wednesday, 3 September 2014 - 18:36
PLL for ATTINY85
Hi all, I am doing a project that involves the ATTINY85. So far, all my AVR clock input is either the built-in RC or external crystal. What does it mean when the clock input for...
Monday, 18 August 2014 - 04:07
Why the LED is too dim?
Hi, This is embarrassing to ask, but... I have an ATMEGA8's GPIO pin as an output. The output is connected to a 360 ohm resistor that is in series with a 3mm LED, whose GND pin...
Thursday, 7 August 2014 - 04:09
internal pull-up for AVR GPIO pins when pins are INPUT?
Hi, I would like to confirm if there is already internal pull-up to Vcc when an AVR GPIO pin is set to input? If so, I don't need a 10Kohm input resistor, for example, when I...
Wednesday, 23 July 2014 - 05:50
Signal integrity with serial communication
Hi, I am looking to have a project where both ATMEGA ICs will be communicating with each other via USART, that is, their Rx & Tx pins. Due to the nature of the project, the...
Monday, 14 July 2014 - 20:05
Multiple grounds from multiple power sources in a circuit
Hi, Up until now I have been very happy and comfortable with one common GND from one power source for all my DIY projects. I am looking to do a clock project using a RTCC (Real-...
Friday, 28 February 2014 - 20:48
ATTINY84/ATTINY84A fuses problem with AVR Calculator site
Hi, Oh, boy...This is first time I attempt to use the ATTINY84A, which can go up to 20Mhz. Well, I have a 4Mhz crystal. I went to the AVR calculator site http://www.engbedded.com...
Sunday, 26 January 2014 - 02:43
How long of an array I can declare for PROGMEM?
I am using an ATMEGA644, 64KB flash. Obviously, I cannot declare and array that is larger than the flash size or large enough that would overwrite my firmware. Say my firmware is...
Thursday, 10 October 2013 - 05:18
STK600 JTAG ICE can be used to program others 32-bit uC?
Hi, I have an STK600 JTAG ICE. And I am able to program the ATUC32 uCs. My question is: Can any uC, e.g., STElectrionics' STM32F103C8, which is an ARM 32-bit with JTAG support...
Wednesday, 13 February 2013 - 05:15

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