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Recently, I used Arduino along with XBee and the temperature sensor MLX90614 to wirelessly send temperature data to my laptop being read in the COM port. The data seemed to read fine when the set up was in room temperature and not moving. But under other circumstances, it became a problem...
So in the case of my above data, imagine you had to send this from one wireless transceiver to another wireless transceiver. How would you send the data?
How can you be sure that a missing bit wouldn't occur?
Hi,
How do we ensure that when we are communicating serially, we don't lose any of the data (say the start bit) in between? And if we do, by what means does the receiver actually 'know' this has happened?
Let's assume I have an asynchronous communication and I am sending some data:
Data ...
Forget this circuit. Explain what you actually want (functionality) in whatever you wish to design.
If you want a laser circuit that rings an alarm when the beam is cut, you can use a simple laser detector connected to a low signal triggered circuit connected to a buzzer.
Something like what I...
I don't know if this is important. But the below link says to even include PORTA = 0x00; command. I have not programmed a PIC anytime, but you could try after adding that.
http://www.pyroelectro.com/tutorials/program_pic/explaincode.html
Can we compare a hardware description language with software language? I don't think the software language have the description of time. Doesn't the speed depend on compiler used, and the type of code you are using the language for also?
Hi,
I have to make the temperature of an object to be sensed and then for it to be cooled or heated according to the preset value in the microcontroller (has to be 8051).
How can I accomplish this? I am using the attached circuit for the temperature sensor. Is it okay?
PART 2
Now, I need to...
Thanks FvM. Say (I am not going to do the following!), I connect a high voltage DC to the supply of a Colpitt oscillator. I also take care of the values of the resistors, capacitors and the inductors, how inefficient would my the circuit be as compared to the modern inverter designs? Thanks.
I read this thread: https://www.edaboard.com/threads/43456/
Can we convert a DC voltage to sinusoidal AC by using an oscillator circuit like Wein-bridge or Clapp? Can this be done for voltages as high as mains (230V rms)? If not why, not?
Right. The resistor as current limiter doesn't take care of the constant current. But I guess I could go with it still? If I am using resistors, I plan to use the resistors in parallel with each other instead of a single resistor because power will be distributed in using many resistors instead...
Yes, a constant current driver. Would this circuit do?
How would I modify it for the value of current I require? Is it only dependent on R, or even on the 4.7k? Say I am driving more than 2 LEDs, and I need total current of 20mA x 20 = 0.4A. My source is say 3V.
Thanks for your help guys :-)...
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