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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
don't buy gsm modems
hmm u can u se a cell phone to communicate if u have two. the idea is
if u have another cell phone then u can connect it to ur comps serial port and then
use it for communication. i don't know rate of a cel phone but i assume its cheaper than the modem option.
i had...
has anybody done wireless transmission of serial data. to be more
specific rs232 std from comp to a micro controller. it would be helpful
if u could gimme links to sites which deal with readymade products,
circuits info on these.
thanking u in advacne
has anybody done wireless transmission of serial data. to be more
specific rs232 std from comp to a micro controller. it would be helpful
if u could gimme links to sites which deal with readymade products,
circuits info on these.
thanking u in advacne
serial port interfacing
hi
I don't know abt the pic Ucontroller u r using but i have used 89c51 atmel
Ucontroller which has an inbuilt serial port in it. i am sure urs must also
have one.Look at the pin diagram and look for RxD and TxD labels.
This basically implies recieve data and...
hi
hi
jus out of curiosity ,y do u need two amps at the outout,r u trying to drive a solenoid as a load(coils),could u elaborate on the load u r to encounter in the ckt.
u have mentioned at the start u r looking for a simple design .y do u need two amps.is it a must?????.
don't know whether...
hi
by direct line of communication i meant no obstruction in th epath of rf waves.if there are buildings (as an eg) for the the ready made ckt i was talking abt u can't transmit it for over a km.moreever the transmission frequency must not interere with the exsisting fm transmission by the...
ready made boards available in the market
hi
u can get ready made fm transmitter boards for as cheap as rs 25
in india,u in pakistan convert it into its equivalent.for transmitting over
1 km u don't need to worry abt the reciever.only the current supplied to the transmitter unit is to be...
u r right
hi
u were right abt the vcc.its the supply voltage and can be called the saturation voltage ie the max value which can be obtained from the particular device neg supply need not neccesarily refer to gnd.its just
a point for lower potential.this might right now sound a bit...
hi
does anybody know how multiple subcarriers frequency modulate a main
carrier.Is there any book or site which has the resultant modulated waveform.please let me know.
abt fm transmitter reciever
hi
i am from india
building a fm transmitter reciever ckt is very tough bcoz of the complexity
involved in the tuning.u get readily available transmitter reciever ckts
in india .u should propably get it at ur place. the problem u r likely to face would be in...
where can i find the datasheets for um91215 a&b series.if somebody could tell me the diff ways of using it.i plan to give its ouput to an fm transmitter and decode it at the reciever. also can i use the 91215a instead of 9125b.
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