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What method you are using to detect the vehicles. Using a camera?
If you are using image processing to detect vehicle the processing power of 8051 will not be adiquate. You should move to a DSP (digital signal processor)
Best regards,
Randika K
Re: ic-prog behaviour
try increasing the I/O delay value upto around 20 which is available in the <Hardware> menu if your programmer is correctly connected and the correct COM port is connected.
Best regards
Randika K
Re: sampling ac voltage
If your signal is a pure siunsodial one at least you need 100Hz sampling rate according to theories. I think it is better to have a sampling rate of 200 samples / sec
will give a better performance.
Best Regards
Randika K
Turn a light weight wheel. then count the number of rotations using an optical mehtod ...within a certain time (say 0.5 s). Try smaller period for larger speed and better resolution.
Best Regards
Randika K
Re: keypad
hi, I'm sending a PICC code to you... It was originally written for PIC 16f877
But definitely you can get an idea about how to interface a keypad.
Sorry for not applying comments. I think you can understand it without a problem.
A simple code.
cya
Randika K
// reads the keypad...
Re: Please Help me ''HOW TO INSTALL RTLINUX ON REDHAT OS&
Hay muruga,
Did you try that as a <super user> ?
Only a superuser can edit those files and install software in linux.
To enter the super user mode type "su" and press <enter>.
when asking the pasword type the root password...
If you are brave and eager to learn something new I recommond you to compile the linux kernel with NTFS support by your self and install it. I did it recently without a problem.
goto: https://www.kernel.org
download a latest vversion of the kernel.
follow the instructions given in the readme...
using a buffer is safer...
but normal Leds can be driven without any problem. Remember to add a series resister of 100 - 220 ohm in series with the LED.
I've driven Leds with out any problem using this ADC
cya
Randika K
I think you r little bit confused about the model of the actual voltage and current source.
The resistance that is in series with a voltage source represents the internal resistance of a voltage source. For an example think about a battry(a AA size ... ;-) ). I think you have had experiance...
12v na 9v
After little bit of googling I found a chip which satisfy ur needs.
follow this link: **broken link removed**
Please note that I've not tried this one.
cya
Randika K
Added after 3 minutes:
Hay, I've found some more chips.
LM338T
LM323T
After some googling (i.e www.gogle.com...
Why don't you have the taste of PIC microcontrollers(https://www.microchip.com)...
In my point of view it is easier to program PIC microcontrollers than 8051 for a beginner.
I suggest, first have some experience on a microcontroller such as PIC16F84 and then move to such 8051 microcontroller...
digital tachometer circuits
Hi all,
Thanks a lot for helping me...
I built the sensor part and it is working well... Here are the things what I did.
I used an IR LED and sticked a piece of reflective tape on the motor shaft (please note that motor shaft is black).
Then I used an IR sensor...
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