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Dear all.I have some question about determining resistance value in designing op amp circuit. For example we want to design inverting amplifier with gain=-2. We can choose R combination (Rin=1k and Rf=2k) or (Rin=100k and Rf=200k). The gain is the same. What's difference between two R...
at45db041-si pdf
ok, this is my scematic. I only focused on the dataflash and its power supply schematic. then the interface is AVR SPI ports.
why the power supply for dataflash is very sensitive? so, how many volts i must use?
thanks
AT45DB041 is a serial flash memory. it has SPI interface. It should be easyly integrated with ATmega microcontroller that has built in SPI interface. There is something error when i tried to integrate with my ATmega64. When my micros try to read the status of the flash, it's always return 00 or...
I want to make some guitar/ sound effect with PC. I use microphone line as input. I use Delphi7/BCB4 programming language. anyone have some tips here? How should i handle the waveform buffer to be input or output
thanks
hi friends
does anyone know how to calculate the checksum of TCP/IP packet, especially for PPP? i wanna use it to generate my own PPP packet using microcontroller
thankz all
WinAVR is good in C and it has good IDE. if anyone is interested in BASIC programming in AVR, i suggest u to use BASCOM AVR compiler produced by MCS electronics.
it's a nice compiler
i use micro AVR atmega162 to interface with smartcard reader/writer and it's working well. the most important thing if we work with smartcard is the size of flash memory and RAM. because smartcard function has many constant that is being stored in flash mem. The purpose of huge RAM is to support...
dear friends,
have anyone here ever tried GR 47 GSM?GPRS module to connect to the internet? especially by using its TCP IP stack?
can anyone here give me tips or example using GR47's TCP iP stack?
I really need ur helps,
because i'm stuck on my GR47 project.
thank u
best regards, enas d
sorry, can u tell me how to use hercules to control my GR47? did u have experience in using GR47?
i don't mind to press that button if u really help me solve my problem.
thanks
ISP Programmer
yeah, im indonesian, from electrical engineering of UGM. what is erratic behaviour? may be if the program of micro need running in 4Mhz, you shouldn't change the Xtal. but generally, if the purpose of circuit is only for programmer, u can use another Xtal. The point is the...
ISP Programmer
i think u can replace 4MHz with 12Mhz. in my experience, i usually don't take care about the crystal frequency of the programmed microcontroller and everything work fine. I think in ISP programmer, the clock is controlled by the master/programmer(PC). u should take care about the...
hi friends,
anyone can give me example how to use GR47 tcp ip stack by give it command via PC's serial port?
i did it and the module response 'connect' but there is no response anymore after that
can anyone help me?
thanx in advance
dear my friends,
have u ever tried GR47 sony ericson gsm/gprs module with built in TCP/IP stack?
i have tried to connect to internet using that module. i give AT command to the module using hyperterminal in windows. i use AT command example in its appnote, but it can't connect internet. The...
connect to server gsm module
dear my friends, have u ever tried GR47 sony ericson gsm/gprs module with built in TCP/IP stack?
i have tried to connect to internet using that module. i give AT command to the module using hyperterminal in windows. i use AT command example in its appnote, but it...
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