Last seen: Aug 14, 2013 6:10 AM EDT
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Computer Systems Engineer & Technician

Username: FieldingBlue

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Location: Inglewood, Australia

Member since: January 2012



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  • $1000.00 USD
    Profile image for Seller deathstarchris


    May 3, 2012

    Fantastic communication.Hard worker.Self motivator.Expert Problem solver!What else is there to say?Fantastic!

    Project Description:[This is a Private Project. You must be logged in to view the Project Description]
    FieldingBlue has not completed any projects.
  • $50 AUD/hr In Progress

    I need a device built that is able to detect a light/LED/flame going out (will require some talk about this) and send an audible alarm(med-high pitch tone) wirelessly to a remote location, typically less than 300m away. I need it to be fully functioning(2 parts), both battery powered, but it doesn"t need to be pretty since it"s a prototype meant for demonstration of concept only. I am available to do the leg work, purchasing parts etc if you can built it, as I"m in Adelaide also.

  • $750 AUD Feb 28, 2014

    Please read the project description to see if it is an acceptable project for youProject Description: Here is the description of what is needed to be done You must be 100% sure of what is to be done and can you do it I have given here a comprehensive description and the Resonant circuit schematic so you can understand what is going on and has to be done we will look at cost after your questions have all been answered if you can do it and I agree to hire you.The project to complete it is a Resonant circuit the PCB Schematic has been done and is being built now the part where it needs special input is the part of the circuit that has the ic"s to control voltage and power or a synthesiser can be used to keep the frequency very stable so that the resonance is always controlled and does not vary as the resonance is critical for its application. The exact resonant frequency is non critical but exact resonance at whatever frequency the inductor capacitor combination happens to be. It will be reasonably close to 12 or 13 KHz or anywhere between. the frequency of the coils excitation can be changed in very small increments to do two things. 1:- automatically via software, find the resonant frequency of the coil capacitor combo, and 2:- slowly follow the resonant frequency as temperature drifts due to both ambient changes and the heating caused by changes due to the very high coil current and voltage across the tuned circuit. This process of course must be much slower than the relatively fast changes that a target would cause.this last message shows that the pcb resonant circuit is being completed now and all that is required is for the programming of the pic so it will keep the frequency stableAnyway, this resonant coil circuit will pump lots of signal into the ground. Please also remember that the receiver also must operate from the same 12 kHz, or just drive a separate divide by four circuit from the 56 kHz signal. The transmit and receive must be locked together.You have to be aware that the power amplifier will peak in its current draw from the power supply at resonance. Now since the resonant frequency must be very accurate, it may also be a good idea to read the output of the in phase (0 degree) phase detector. Once resonance has been found, it is necessary to keep it there with a slow loop time so that fast changes from the four phase detectors get through the loop filter as these signals represent the actual target being looked at. A small amount of phase shift in the detectors will represent a small and possibly deep target and the absolute phase detector readings if not correct can cause a target to read falsely positive or falsely negative for the required metal being searched for. Any way i hope this is helpful. incidentally, generally speaking only two phase detectors are needed and the other two reflect the others exactly. Only the source code will be required, as long has sufficient commenting (which should go without saying, really).The reference for the power supply voltage for the PIC18. The accuracy of that shouldn"t be too much of a problem, since we are only looking at relative measurements, but any noise on the power rails may be an issue. This also applies to the clock sources as the system should be able to tune itself with any change in clock frequency (assuming it is over longer periods of time, ie. tempco of crystal etc.)The PIC18 chosen should be more than enough for what we need, since the frequency will not be changed very quickly, which allows measurements to be averaged. The main thing is getting the current sampling correct. You will be able to liase with 2 Electronics Technicians before and during the Project to help with and answer any queries.A copy of the Resonant Schematic will be supplied and if accepted and agreed upon in all aspects a completed Resonant PCB can be supplied, but first we would need to have a NDA written up, signed and witnessed. Please ask any question

  • $30 USD May 13, 2013

    Micro-processor based educational device. Need custom PCB design and assembly. Future work based on initial consultation

  • $30 USD Mar 27, 2013

    HiMy final project is design body Temperature AND Heart Beat measurement and these input going to send the data via mobile by usung GSM 900. All used with Arduino boards.I have done temperature measurement (2 LEDS and LCD output), and now struggle to heart beat measurement. I have redesign this sensor I have redesigned adruino heart-rate sensor because no time for order the actual sensor and going to use the (Latest Processing Code for Pulse Sensor) from this link: Latest Processing Code for Pulse Sensorbut unfortunately there are loads of error here and it does not work.I need report writing and explanation of the processing devices as well.I"m so rush because it is close to deadline and my supervisor is sick off ... not able to assist me any more. please let me know if your are able to guide me.

    FieldingBlue does not have any open projects.
    FieldingBlue does not have any work in progress.
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