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ECET0purdue
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Posts posted by ECET0purdue
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sometimes people dont know what to search google for? i know i ask a question and with the responce i google it... for example i had a questoin about P/S converter.. someone suggested a UART.. now i had something to google....:) i think a better suggestion would be to search threads before posting...:)
cheers
glen -
The baudrate for the display has options that can be set they said
" Baud rates: 1200, 2400, 4800, 9600, 14,400, 19,200, 38,400, 57,600 and 115,200" so iam guessing it can go up to 115,200"
The transcevers i got are.
Baud Rates 1,200 to 38,400 baud
Data Format Asynchronous - 7 data, even parity or 8
data, no parity; 1 stop bit
so i guess i will try to use max at 38,400
dip is good...
so you dont think the buffer problem with the 16550 would be a problem?
Thanks
glen....
iam going to have to put you on the special Thanks page :D -
That sounds good... and i see the difference now i was looking at them and i came across this.
NS16550
Same as NS16450 with a 16-byte send and receive buffer but the buffer design was flawed and could not be reliably be used.
NS16550A
Same as NS16550 with the buffer flaws corrected. The 16550A and its successors have become the most popular UART design in the PC industry, mainly due to its ability to reliably handle higher data rates on operating systems with sluggish interrupt response times.
PC16550D
Same as NS16550A with subtle flaws corrected. This is revision D of the 16550 family and is the latest design available from National Semiconductor.
iam guessing i would need the 16550A -
" i did get to finish.... "
i am going to look up some information on UARTS before i would ask to get one from you. i would not want you to wast time sending it and ect. if i am not sure if iam going to use it.
cheers,
glen -
well before i say yes because i would like to try the UART, What device would i need to program them.. sorry i dont know anything about them,
Also What is the difference between 2 wire, 3 wire, and parallel , serial connections? the reason i ask is because i was offered this chip by maxium http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3397/ln/ but iam not sure on this chip either..
also you had said the parallel to serial and serial to parallel converters would work but need a lot of ic support.. I thought it was one chip with intergrated and gates and flip flops?
Well iam going to look up some info on the UART -
hello agian too your too..
well i have never used an UART nor do i know how to program them.. is it hard? i have programed a pic chip?
Also could i use something like this?
http://www.national.com/ds/54/54F164A.pdf
Which needs no programmming..... Also with this how would i find out if it is going to be fast enough? Thanks for your help.. -
of course i can and yes sorry feq..is frequency. this is the chip iam going to use. http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010487
so i will use the analog output from the D/A converter as the input to that pic chip. This D/A... http://www.analog.com/en/prod/0%2C%2CAD5330%2C00.html So now iam looking for some way of getting a serial to digital converter.. which i was looking at what you had suggested...
have not found anything yet...but i have not looked too hard either..Do you know of any free software that i could draw good skimatic of What i plan on doing...all i got is MS paint...
once agian.. hope this helps.. if you are still confused let me know and ill try to explain it better.
cheeers.
glen -
Thanks that is exactly what i was looking for. Now iam using that for my project and at the other end the anolog to feq converter is a pic chip... cant wait to program that :P then all i need is something that will turnon a relay when it gets a certin feq..a feq i can set?
any ideals?
thanks
glen -
Hello,
This is what i was looking for and wondering if it is even possable. ok first i am sending data over a 9 pin connector. I got a chip that will take in an anolog signal and convert it to a feq. but my questions how can i get an anolog signal? i was thinking about using a D/A converter but the pin out of an 9 pin connector does not send data using 8 bits to were i could use the D/A...iam not sure how it sends it or does it send it all ready analog data?? ..really confused.. but any way does any one know how i could do this or what i could look for?
thanks
glen -
o ya add this .
int x; to the top of mine and it should work?
and make sure
x=.00
do(
x=x+.01
MSComm1.Output = Chr(x)
)
while(x<3000)
is between the privent sub click() part and the end sub part.. -
What is it that you want to know?
i rember in school using a thermister in a WS bridge connecting it to a A/D converter and getting a reading of temp with that..but it was not too good... -
did you ever recive anything????
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wow alun how did you help him....... i still dont konw what he wanted.... ???
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ya ...what he said
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quick question.... this is what i was told about the screen.
Not sure how you plan to power the unit - this model comes with 8 to 26 VDC. If you are supplying power, it will be fine. If you plan to power this unit with the vehicle power as the source, you will need a vehicle power conditioning board. If that's the case, I will need to make up a special unit.
why whould i need an power conditioning board? and what would be the purpose? i could just say yes i need it but then it would take longer iam guessing to get to me... do i really need one of these...
thanks
glen -
quick question.... this is what i was told about the screen.
Not sure how you plan to power the unit - this model comes with 8 to 26 VDC. If you are supplying power, it will be fine. If you plan to power this unit with the vehicle power as the source, you will need a vehicle power conditioning board. If that's the case, I will need to make up a special unit.
why whould i need an power conditioning board? and what would be the purpose? i could just say yes i need it but then it would take longer iam guessing to get to me... do i really need one of these...
thanks
glen -
****update****
well iam just waiting on some products before i do any more so thanks for your help and watch for this topic ;D ;D
thanks,
glen -
so what if you look through a camera at a camera looking at a tv? ;D
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http://www.omnexcontrols.com/files/Data_Sheets/RAD-ISM-2400-SET-UD.pdf
these were scsi connection...i found the ones on my aka block diagram.. they are 9 pin connectors...and go about 2 miles?it is a terminal that [glow=red,2,300]have[/glow] a touchscreen
Has... -
was it nextel? ...... i like them :)
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its called a discount.. that is why it was cheaper and you buy a plan which you pay for.. a radio is a one time cost ...if you could buy a cell phone and never have to pay to use it well then i bet they would cost a lot more...
btw....i once got a free phone too....along with that 3 yr contract for 84 dollars a month....
i rather own the IRS...
cheers
glen -
not 100% sure .......
ok it is transmitted at a feq say 94.7 fm then when it reaches the radio there is a circuit inside which changes the feq to a lower feq so it can be played though speakers and head by the human ear. Now the higher the feq means the circuit inside has to me more complex which cost more. so why have a more complex circuit just to get an antenna little smaller?
cheers,
glen -
you could always use some fishing string and tie one end to mouse and other end...to...your finger ;D
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u can use an array. i have never used them in VB but i have in lots of other programming tools.
or use a varable. like this
x=.00
do(
x=x+.01
MSComm1.Output = Chr(x)
)
while(x<3000)
%this will display it all... is that what you wanted? if you need the other part in it too do this.
t=1
x=.00
do(
x=x+.01 %this will keep adding .01 to x
t=t++ % this will keep adding 1 to t
Private Sub Command(t)_Click() %this will sub t for what # it's at
MSComm1.Output = Chr(x) %this will sub x for what ever # it's at.
End Sub
)
while(x<3000) % it keeps doing this till x reaches 3000 or what ever
% what ever number you put in here.
like i said i never programmed in VB but this is how i would guess to do it... and this ishow i would do it in all other programming i have done..
cheers,
glen
9 pin connector to d/a converter????
in Electronics chit chat
Posted
hummm...well yes that does help... so let me know what i need to do to get this chip...also will it do it both ways? or do i need 2 chips?
thanks
glen