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Type: Posts; User: joskem

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    Closed: MSP-EXP430FR5739 experimenter's board

    Hello, I am running the Demo Application on the FRAM MSP-EXP430FR5739 experimenter's board. When I am in "Mode 3: accelerometer demo", acceleration data are supposed to be measured and written to the...
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    Closed: RMS to DC conversion

    Hello,

    Do you have any suggestions of a chip / circuit I could use to get the RMS (or MAX) value of a 40 MHz input AC signal?
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    Closed: cc2420 output power programming

    I am trying to figure out how to program the power delivered to an antenna connected to a CC2420 RF Transceiver (TinyOS 2.1).
    In the "CC2420.h" file, I have programmed the RF output power as...
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    Closed: capture raw data in COM port

    I have a Bluetooth transmitting device and my PC (Windows 7) is connected to it and configured as if it was connected through a RS232 serial port (COM4). How can I capture the raw data transmitted by...
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    Closed: Re: measure battery voltage with microcontroller

    thank you very much!
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    Closed: Re: measure battery voltage with microcontroller

    Thanks! So, I will just connect a 10K resistor between the ADC and the ground.. Should I do something similar when I try to measure the voltage of the battery? (i.e. ADC4 - battery - 10K - ground)?
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    Closed: Re: measure battery voltage with microcontroller

    It is an MSP430F1611.. Since I am all new to microcontrollers, how should I use the pull down resisotr? And would it be the same if I used a regular 10K resistor?
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    Closed: Re: measure battery voltage with microcontroller

    No, all I have done is to measure the voltages on the pins. I was expecting ADC4 to read 0V, however the voltmeter does not indicate any value, meaning that it is not dc, but rather a fluctuating...
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    Closed: Re: measure battery voltage with microcontroller

    I have set up the reference voltage to be AVcc / AVss. I measured these voltages using a voltmeter as 2.91V and 0V respectively.
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    Closed: measure battery voltage with microcontroller

    I wish to measure the voltage of a 1.5V battery using a microcontroller (supply voltage of 3V).
    I thought of connecting the battery on the ADC4 output of the microcontroller, and wrote a program...
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    Closed: Re: micontroller ADC to voltage conversion

    No, I am using just a TI MSP430F149 microcontroller. According to the datasheet, the MSP430 uses a 12-bit ADC module and contains two selectable voltage references (1.5V and 2.5V). Should I take...
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    Closed: Re: micontroller ADC to voltage conversion

    This is a good idea! Where exactly can I measure the Vref and Vref- voltages?
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    Closed: Re: micontroller ADC to voltage conversion

    Since it is hard enough to change the electronics circuit, is there a way to find out the actual Vref+ and Vref- voltages in my case? i.e.
    - voltage reference set to 2.5 V...
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    Closed: Re: micontroller ADC to voltage conversion

    So it seems that I cannot be sure about the actual value of my Vref+ and Vref- voltages?
    What can I do to find their actual values? I am not very familiar with microcontrollers..
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    Closed: micontroller ADC to voltage conversion

    Hello,

    I have a temperature sensor connected to a 12-bit microcontroller, with the reference voltage being set to 2.5V (sref:REFERENCE_VREFplus_AVss, ref2_5v: REFVOLT_LEVEL_2_5).

    When the...
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    Closed: Re: coaxially-fed patch antenna

    Many thanks :)

    And one last question..could you please tell me how I can solder the outer conductor to the ground plane and the inner conductor to the upper patch?
    Is it me I have to do that? Or...
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    Closed: Re: coaxially-fed patch antenna

    Thank you very much.
    So, I have to tell the manufacturer to:
    a) empty a circle on the ground plane with a radius equal to the radius of the coaxial cable's dielectric
    b) drill a hole from the...
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    Closed: coaxially-fed patch antenna

    I am in the process of having a patch antenna manufactured through a PCB process. The antenna is fed by means of a coaxial cable. I guess that the manufacturer will place the holes for the feed, and...
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    Closed: Re: printing on Rogers 3010 ceramic

    Thank you for your response. Could you please suggest any potential PCB manufacturers? (preferably in Europe)
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    Closed: printing on Rogers 3010 ceramic

    I need to print a patch antenna on Rogers RO3010 dielectric.
    What is the way of printing on a ceramic material, and is it easy to find a manufacturer who will have the required equipment? Any...
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    Closed: literature on HFSS optimizers

    Where is it possible to find more details about the optimizers which are available in HFSS?
    For example, one of the optimizers is the pattern search optimizer, however where can I find out which...
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    Closed: Re: HFSS-help with defining output variable

    thank you for your answer. However, I need to calculate this value as a variable in HFSS (because I need to use it as an optimization parameter to perform an optimization analysis). Is it possible to...
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    Closed: HFSS-help with defining output variable

    Hello! I have run a frequency sweep analysis in HFSS and have plotted a variable (let's call it Q) versus frequency. I have selected a Linear Count setup, with 1000 points, so it is as if I have...
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    Closed: Re: HFSS antenna as a receiver

    Thanks for your answer! So, all I have to do is to find the accepted power of dipole 1 (Pacc) and S21, and then calculate the product S21*Pacc. Is that right??
    What I can't understand is that S21...
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    Closed: HFSS antenna as a receiver

    Hello. I have designed a simple dipole antenna in HFSS (transmitter). Then, I have designed a second dipole antenna to work as a receiver. How can I find the power received by the receiver antenna??...
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