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Recent content by Bhuvanesh Nick

  1. B

    basic switch program inarduino

    int x=0; void setup() { Serial.begin(14400); Serial.print("starting"); Serial.println("Program"); pinMode(13,OUTPUT); pinMode(7,INPUT); digitalWrite(7,HIGH);//internal pull up } void loop() { if(digitalRead(7)==0) { x=!x; digitalWrite(13,x); while(digitalRead(7)==0)...
  2. B

    working of a simple circuit

    why do we want to amplify.the circuit works on open swith .so bas voltage is set by Rb resistance.if i use some sensor and i gave that output to input of base..i agree your point of amplification..but why its here used,we can also make it with single transistor.right
  3. B

    just an word clarification in gate representaion

    does n indicates the texas instrument or quad 7400N quad..
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    clarification on basic not gate

    why is that so ..wy dont i use pnp
  5. B

    explaination on basic logic gate

    can explain me plz how the circuit and and gate works as in the above diagram
  6. B

    working of a simple circuit

    its quite simple.as q1 is npn transistor it need is positive supply to make the circuit work while switch is in close the negative power is supplied hence it wont work i mean alarm in off. once switch opens..positive power is applied to switch through resistor .hence circuit works..if u have any...
  7. B

    doubt in rc circuit about charging time

    Sir,capacitor has infinite resistance.so in that way,why dont it charges first and then supply it to led
  8. B

    doubt on digital logic system

    now i am clear with what you say.as there are positive and negative logic system setting on and off.if i connect one input has +5v and other is -5 .what will u consider..a postive logic or a negative logic system
  9. B

    action of voltage drop..

    Sir if i have 1.5v supply one variable resistor and led..can i make it to glow even the requirement of led id 3v
  10. B

    just an word clarification in gate representaion

    the "7400" Quad 2-input AND. what this pointing here
  11. B

    clarification on basic not gate

    i am new to electronics in above not gate circuit diagram how i am getting hight output for no input and no output for high input doubt(even if its hight input..i have collector voltage am i right)
  12. B

    action of voltage drop..

    in the above circuit.what are all the voltage drop that i getting is given to led..am i right or wrong.if wrong is there any action realted to voltage drop of resistor to led clarify me plzz
  13. B

    on basic resitor activity

    what is pull up resistor and pull down resistor.where it is used.Explain me basically
  14. B

    doubt on digital logic system

    i seen in it in a page it is mentioned we are using positive logic systems that is above +2v for on and below 0.8 to for off.but in below statement its said to ground for 0 .if i do so it looks like - voltage ..help me plzz "we can define the ideal Digital Logic Gate as one that has a "LOW"...
  15. B

    digital logic gates.

    i seen in it in a page it is mentioned we are using positive logic systems that is above +2v for on and below 0.8 to for off.but in below statement its said to ground for 0 .if i do so it looks like - voltage ..help me plzz "we can define the ideal Digital Logic Gate as one that has a "LOW"...
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