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Can't access ATmega165A via JTAGICE MKII / 3
Hello, I'm having trouble programming/debugging an ATmega165A. Programming via ISP works fine. But programming/debugging via JTAG always failes. I'm having a brand new JTAGICE3...
Thu. Jun 6, 2013 - 12:31 PM
[TUT][HARD]Differential ADC For Monitoring Voltage Window
Sometimes an ADC is needed to monitor only a voltage window. For example does the voltage of a 12V Pb-Battery never exceed 14.4V (V_MAX) and should never go below 10.5V (V_MIN)....
Fri. May 14, 2010 - 11:28 AM
Macro trouble
Hi, I'm having trouble getting some macros working properly. I could break down the problem to the following program: #include // Get Bit Defination Of Symbol #define io_bit(...
Wed. Apr 28, 2010 - 07:18 PM
250mA DC fuse with a wide temperature range
Hi all, I need to measure DC current in the range of +/- 250mA and I need some kind of short cut protection. I use an 1 Ohm shunt and measure the voltage drop with the ADC of an...
Fri. May 22, 2009 - 06:12 PM
Analog Comparator issues (ATtiny24)
Hi all, it's been a while ago, but it's nice to be back at avrfreaks.net 8) I need to measure the duty cycle of a PWM signal. The PWM frequency can vary in the range of 100 Hz to...
Mon. Jan 12, 2009 - 04:43 PM
Enhancing input capture resolution
Hi, I need to monitor the jitter of some short pulses with a length of approximately 500µs. The max. valid jitter is 4µs. I need to do some statistics which are not available...
Wed. Jul 30, 2008 - 06:44 PM
How can I tell GCC to use STD instead of STS
I'm using the standard WinAVR makefile (-Os) and WinAVR20080512. Question 1: I have a small application which uses struct data (located in SRAM) which needs to be reinitialized...
Wed. Jul 2, 2008 - 08:22 PM
WinAVR20080512 optimizer is too good
Hi, I want to use a few global register variables (r2, r3, r4) to implement several timers with a single hardware timer: // System Timer Resolution Unit = ms #define...
Mon. Jun 9, 2008 - 05:13 PM
Just another LCD question - 4x20 LCD is driving me crazy
Hi, I want to connect one 1x16 LCD, one 4x20 LCD and one D-flip-flop (74HC574) to an ATmega164P. All 3 parts share the same 8-bit data port (PORTB). I'm already able to send data...
Mon. Jun 2, 2008 - 12:46 PM
Need -40 to +125 °C control cable
I need to connect some SMD sized sensors (5x7.5mm) via control cable to an AVR. The sensors (humidity and temperature) will be used for climate tests. They are designed to operate...
Mon. Feb 25, 2008 - 08:07 PM
Need galvanic isolation
I have to build a device that can measure current among other things. For current measurement I need galvanic isolation. The complete device shall be supplied by USB. For...
Fri. Feb 22, 2008 - 12:22 PM
[MAN][HARD][SOFT] Random Number Generation
A very busy semester has passed. One of the reasons why it was so busy was my work on the article Stochastic processes in embedded systems – Random number generation I did this...
Mon. Feb 4, 2008 - 12:21 PM

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