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  1. shekhar_dandya

    dividers and their duty cycle

    HI Everyone You must be knowing how to design a divide by three or a divide by 5 counter using flip flops .The output is a divide by 3/5 of its input but its duty cycle is not 50%. How to make duty cycle of divide by 3/5 counter to be 50%?
  2. shekhar_dandya

    simple question

    Thanks audioguru for clearing the concept.
  3. shekhar_dandya

    simple question

    Hi everyone, I just wanted to know that,if one connects an ammeter in parallel across an ideal power supply(D.C)what will happen to the ammeter? 1)It will burn 2)nothing will happen,circuit will continue to work.
  4. shekhar_dandya

    multiplexed led display prob

    Kevin,I did not get you.can you please elaborate it with a schematic?actually i wanted the logic between the BCD o/p's of decade counters and i/p of a 7seg decoder/driver.
  5. shekhar_dandya

    multiplexed led display prob

    I want to build a counter with 7490's and a BCD to 7seg decoder(common anode). I don't want to use a microcontroller. For control logic of switching transistors,I have used a 7490 and a 3:8 decoder which pulls base of PNP X'tors low sequentially.I wanted a logic that puts the correct BCD code...
  6. shekhar_dandya

    Simple Circuit Problem

    Rather than superfast diodes,diodes with low cutin like Ge diodes must be used.the waveform is merely showing 2 diode drops,0.7V peak.Its practically going to happen. Actually,what's the aim of the circuit?
  7. shekhar_dandya

    multiplexed led display prob

    Hi everyune, I wanted to know that if we use a multiplexed Led display,how to implement control logic so that when 1st digit is activated by a x'tor,the code for first digit is through and so on.If microprocessor or microcontrollers are not used.
  8. shekhar_dandya

    what is micro switch

    Ante, Can u tell how they are used in touch screens?
  9. shekhar_dandya

    reliablity of hFE

    How much reliable it is to rely on h[FE] of a transistor in deciding it's Q point? how to decide a Qpoint of a transistor based on specific application?
  10. shekhar_dandya

    inductors and arching

    thanx audioguru for the info
  11. shekhar_dandya

    inductors and arching

    I wanted to know that if one uses an inductor in series with a switch (either a transistor or a mechanical switch)and a DC source without using a freewheeling diode,how will the inductor react when switch is opened? will it cause arching/sparking or melting of transistor?if so,why? what happens...
  12. shekhar_dandya

    batteries

    Ante,thanks for telling methis.and what physical measurement?
  13. shekhar_dandya

    decoding a 10khz tone!

    U could use an IC 567 which is a tone decoder. It consists of a PLL , a comparator and a transistor switch, all integrated inside it.for more info about it search LM 567 datasheet
  14. shekhar_dandya

    batteries

    need to calc A-H capacity of dry cells when its not specified.help ???
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