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okk...i think i should use some 21st century opamp..like TL061 or TL81 or some thing like that . But i cant understand the sensor part.Can any one give me some brief about the sensor part ?
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it's easy and smart to use accelometer or vibration sensor . Rather than making it...
i am making this earth quake detractor . The schematic is given below
But unfortunately LM741 is not available in my area . so which opamp i can use instead of ?
N.B: i found MC1458 is quite similar to 741 , which is available in my are . Can i use them?
I am building a 16*16 dot matrix with 4 8*8 small matrix.The internal connection of those 4 matrices is little bit puzzling to me .To simplify or clarify myself about the internal connection i made this schematic.If any one can recheck and confirm about my connection..i will be grateful...
I have interface a IR sensor with a arduino and i can observe the analog values given by receiver . If the sensor is blocked then it gives a particular range of values and for unblocked it gives another range of values .
Now i need to determine for how long (time) it is giving blocking values...
i am building a led matrix but to drive the matrix most of the internet resource use MAX7219 which is quite expensive for me because i am planning to make a bigger matrix display ...is there any cost effective solution ??
I am creating a 21 to 12 volt , current rating 10A Buck converter . After calculating The value of inductor is 2.05mH . Now which type core i should use to make the inductor ?
And what is the difference between coated & uncoated toriod core ??
i am connecting arduino with ITEAD 3g shield though it is 3g shield i'm currently using 2g means GPRS(actually EDGE) mode . i'm trying with to connect http with at command. All my at command works as it should untill GET command. it stuck in GET command
my question .
1 .If i want to seee the...
i am using ITEAD 3G shield and trying to establish a TCP connection . when i connect with google it connected perfectly but when i'm trying to connect to self made server it shows connection failed
Note: i have created this server with socket test using my own PC as server and the shield as...
I am using arduino uno with itead 3G shield , my shield works fine but it doesn't responding properly ,
After sendint
"AT+chttpact =......"
it back me +CHTTPACT: REQUEST
then when it send GET command it doesn't response at all
What could be the problem ??
here the real response and the...
i have bought SIM5216E supported arduino 3g shield. Is the Gprs AT command for previous sim moudel and this module are same ??
AT+SAPBR command is not found in their at command manual . So now how can i stublish gprs communication ?
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