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very good example of interfacing RTC: check this link and it has already the code
code:
since you adc is powered with 5vdc then it is impossible to input more than 5v voltage to your adc..
if you want to input bigger voltage than in your Vref then you can use voltage devider for that..
check this tutorial and working code of adc0804:
and also check this voltage devider calculator:
read through with the tutorial here and it has a very good example code
you can also try the i2c the two wire interface eeprom if you want..
here are some tutorials:
there are many projects here using timers… go and search for that and also read this
if you want to send video frame in real time you must use High speed controller for that… dont use the old 8051..
in GSM interfacing you need to know the At commands of your device..
you can use AVR/PIC or 8051.. in GSM interfacing use UART/USART for interfacing and if you already receive the data from your modem you can transmit it to your PC via UART..
in camera interfacing , use Camera that has SPI support for easy interfacing..
try it.. read how adc0808 works download its datasheet…
you can directly read the 8bit output pins of adc with parallel port
did you edit your question above?? hmm
TMOD, — this is timer mode controll register
TCON, — timer control register
TH1, — MSB byt of timer
SCON — serial register…
search them all there are may article about this…
they are all correct.. Im telling you interfacing is about the connector.. you can still interface without using any connector you can solder everything as long as the connection is correct….
connection is just for standards and easyness.. so the answer of your connection is yes.. got through with the each pin of DB25 and study..
