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string table pointer returning "not declared" error(PROGMEM)
Dear freaks I was storing the AT commands in program memory for GSM modem communication in a separate .c file named simcom.c.But the problem is,when i am trying to read the...
Wednesday, 13 December 2017 - 06:52
Best approach to check sms while doing other work(GSM modem+atmega328p))
Dear freaks   I am designing a remote sensing platform(multiple door sensor+multiple dc-current+multiple ds18b20 temparature sensor+dc voltage sensing) using atmega328p...
Sunday, 10 December 2017 - 07:59
Fixed width big char fonts needed for Thiele ks0108 driver
Dear freaks fixed width big char fonts(preferably 15x31 & 7x16) needed for Thiele ks0108 driver.The GLCD font creator is not producing monospaced font.So in order to refresh,I...
Tuesday, 28 November 2017 - 22:09
Best practise to disable external interrupt within ISR
Hi freaks   I am designing a nrf24l01+ based security system where there will be a 3.3v coin cell powered door sensor which will detect the door opening and report to the...
Tuesday, 7 November 2017 - 20:19
"undefined reference" error when trying to build a c++ source file
Dear freaks I was trying to program my atmega328p using C++ using atmelstudio 7.0.1417.I was trying to test "function overloading".I have a library file for uart functions i.e...
Friday, 15 September 2017 - 19:18
"mystdout" FILE declaration returning error
Dear freaks I was trying to implement printf function in my uart code to make it more easy.I write code in modular style.But the problem is whenever i am declaring the buffer for...
Thursday, 7 September 2017 - 20:40
why uint16_t substraction returning negative value?
Hi freaks   why the substraction result between two uin16_t is becoming negative.For say,   uint16_t a; uint16_t b;   if a<b here and if i substract i.e a - b,...
Saturday, 15 July 2017 - 12:31
Help needed to build digital ESR meter
Dear freaks I want to build a ESR meter based on atmega controllers.I have gone through some resources on the internet but they not very descriptive/informative.Please guide me...
Friday, 23 June 2017 - 13:31
unexpected array behaviour in code
Hi freaks I am building a MSGEQ7 based spectrum analyzer.the MSGEQ7 outputs 7 different frequency values(outputting from 0 to 5v depending on the intensity of the particular...
Saturday, 6 May 2017 - 09:48
strange problem in atmega328p(arduino onboard) SPI
Hi freaks I am facing a strange problem. I was writting a code to communicate with a MCP4921 DAC via spi.The spi communication is running fine on a fresh atmega328p@8Mhz. But The...
Sunday, 23 April 2017 - 15:49
How to calculate hysteresis when the OPAMP supply voltage is changing
I have designed a GSM/GPS based tracker which is installed at my bike.But it is draining battery too quickly.So I want to add a cutoff circuit when the bike is not running(battery...
Sunday, 26 March 2017 - 21:00
"Array subscript is not an integer" error when using atof()
Dear freaks   I was converting NMEA gps coordinates to floats for further calculations.My code is as follows.But whenever compiling,it is returning "Array subscript is not an...
Tuesday, 14 March 2017 - 23:16

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