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Recent content by UroBoros

  1. UroBoros

    Best online resourses for Derby (United Kingdom) Job search

    hi, I am an Embedded Software Developer trying for a placement around Derby Area in UK. Can I get some some info about most effective methods for job search in that area. Also may be more info about specialties in demand in that area. Thanks
  2. UroBoros

    Sampling Rate and PID loop timing in a Tyrister based charger

    Thanks for the valuable input. Let me first Sync the ADC reading Triggering Timer with Zero cross detection Pulse and then Read 32 samples 625uS apart. That gives a Feed back every cycle and we can update PID every cycle. In that case my LP filter lag also can be accommodated without any...
  3. UroBoros

    Sampling Rate and PID loop timing in a Tyrister based charger

    I am trying to do a Phase control Battery charger. Plans to Do Phase control to maintain and apply voltage to battery with a monitor and limit for current. PIC16 ADC monitors voltage and current. PID algorithm derives the required phase angle for voltage, if current exceeds in the lower...
  4. UroBoros

    SCR Phase control - Single pulse or Multiple Pulses?

    Got it. Thanks. As you have suggested if I can use a MOC opto, then no pulse train needed, just Steady DC dc drive will be Ok.
  5. UroBoros

    SCR Phase control - Single pulse or Multiple Pulses?

    Thanks for clarifying the key issues, exactly on my requirement. Now very clear about the problem. Regarding the pulse train, what is the basis of On Time and Off Time? which parameter of SCR I need to look for in that case?
  6. UroBoros

    SCR Phase control - Single pulse or Multiple Pulses?

    I am Trying to control the DC voltage for a Battery charger using phase control. Basic circuit here. In the firing position should I send Single Pulse or should I send a pulse train till the end of cycle? To my Knowledge one the SCR is on, it will remain on till the next zero cross. I am using...
  7. UroBoros

    AC sinewave sampling circuit

    Thanks for the link. I can work with Voltages of this level and initially I will be working with isolation transformers of 1:1 at 230V side. btw I found some circuits with microchip using op-amps to do this. Except the presence of more filters is there any advantages worth the extra components...
  8. UroBoros

    AC sinewave sampling circuit

    Thanks for the response. First of all, my aversion towards resistor mechanism was mainly derived from posts like this. I think I will get rid of that. mainly phase shift is not something I should prefer to introduce. So I think I will move over to resistor network Zero cross is my immediate...
  9. UroBoros

    AC sinewave sampling circuit

    I am trying to sample s sine wave for zero crossing detection as well as other measurements. But I would like to avoid the method of directly connection to AC mains using dropping resistor and then sampling. My MCU works from a step down transformer power supply. So 0-12 v Step down isolated...
  10. UroBoros

    Power transient filter to PIC Micro Board

    Thanks for pointing it out. The resistor solution is what Microchip documents are suggesting. In my case I can use both methods if needed. Because normally what I do is The Capacitor in the MCLR pin I do not solder while developing. The proto PCB will be having Footprints for them, But the Real...
  11. UroBoros

    Power transient filter to PIC Micro Board

    This seems a good solution to discharge the capacitor immediately. Thank you
  12. UroBoros

    Power transient filter to PIC Micro Board

    Thank you very much for the detailed Replay. I have seen such an arrangement in Microchip Notes but I was thinking that, it is needed only if we use high value caps in MCLR. If it is a standard procedure (Now I understood the purpose of that resistor)I will add it since it is not a big issue to...
  13. UroBoros

    Power transient filter to PIC Micro Board

    Hai, Sorry if this is a subject already have discussion, (Good chance for that) but I was not able to find answer for my issue with search here. For my Pic Micro circuits I usually Power from small SMPS and in some cases transformer and bridge. Usually I bring 12v to Board, provide a...
  14. UroBoros

    Need advice on choosing RF module for sensor interfacing

    Thanks for the details. On a final analysis there is not much prize difference between Microchip 2.4 GHz unit and this one . The range I need to check both once again. This page has got some more info about range of HT12 Thanks again
  15. UroBoros

    Need advice on choosing RF module for sensor interfacing

    The HC12 I have not used, but I have tested MRF24J40MA. Not serious testing but it has got its own correcting mechanism and all. Its own PCB antenna and inside building very low range only. Not sure about it. my colleagues did it. Anyway I will test this HC12 also. HC12 seems half the prize...
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