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Recent content by electronika.design

  1. E

    PIC18f45k22 timer 1 not working properly

    I am using PIC18f45k22's timer 1 to display D.PIC for 1 second on my 4 digit 7-segment led and after 1 second led should remain off for next 1 second. This should continue. I am getting what i wrote above but the problem is that when D.PIC is displayed, it is continuously flashing. I want it to...
  2. E

    JD5 smd compnent

    I just broke a piezo buzzer accidentally...but the ckt seemed interesting to work on...so i am trying to analyse this ckt... there is no name nothing about this component....Only JD5 is the clue for this... it has been used at the input....after 2 diodes
  3. E

    JD5 smd compnent

    What is a JD5 smd component??? It is connected at the input power supply of my circuit. it is a 4 pic IC like component... the inputs are connected through the diodes as shown I am not able to analyse what it does....it is giving its output to an AC driven optocoupler... it may be a rectifier or...
  4. E

    self driven piezo

    piezo red- supply piezo black- ground piezo blue- feedback most of the times the feedback is connected to base of the transistor...but here it is connected to emitter... cannot understand the configuration... the purple lines describe the outputs coming from timer 555 to activate the transistors
  5. E

    Having trouble analyzing this power supply..

    While im trying to analyze the ckt, I checked voltage across emitter register 100 ohm which turns out to be 0.7volt and at the base of transistor 1.280volt and at the VCE is 23.20 volts (PEAK value). this means that transistor is not turning on....am i right???
  6. E

    Having trouble analyzing this power supply..

    Thnx...What software are you using for the analysis
  7. E

    Having trouble analyzing this power supply..

    According to me the Zener 2 & 3 diodes are used in forward biased connection. Yes! they are installed the same way as here. and the value of capacitor is 33 micro farad/400v.
  8. E

    Having trouble analyzing this power supply..

    2N0000 is a general name given for diodes..plz ignore it and its an NPN transistor this is a similar one using transformer...plz go through this one too. thank you
  9. E

    Having trouble analyzing this power supply..

    This is a power supply circuit I found while working on a project. I have been trying to analyse it but I am not getting the point of using Zener2 & Zener 3 in the circuit. If anybody comes to know what it acts like or can relate it to something you already know, please send me a response. Thank...
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