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  1. C

    Lamp contol with logic circuit

    so do i need to remove all the 6.8k and 20k resistors or only the 20k resistors? for the BASE of BC547 what resistor value should i use then?....or do i need to find another type of transistor...?... how about BC107? ??? thanx
  2. C

    Lamp contol with logic circuit

    i couldnt find the book with the info i needed..... the one with the info has not been returned to the library... and i need this circuit as soon as possible... that's y i asked here... sorry guys.... i really need ur help....
  3. C

    Lamp contol with logic circuit

    do i need to remove all the 6.8k and 20k resistors or only the 20k resistors? what resistor value should i use then?....or do i need to find another type of transistor...?... how about BC107?
  4. C

    Lamp contol with logic circuit

    does this mean that the resistors that i added are correct? can i use BC547 and connect the base BC547 to the output of the circuit with 5.6k resistor in series?
  5. C

    Lamp contol with logic circuit

    is this circuit ok? im also thinking about adding a relay at the output (where the lamp is).. relay with rating should i use...? wht else should i do to make this circuit work...? sorry... im not tht good in logic circuits... ??? thanx
  6. C

    Lamp contol with logic circuit

    is this circuit ok?
  7. C

    Lamp contol with logic circuit

    do u guys mean like this? so i need a 1k resistor..... ok thank u very much u guys...
  8. C

    Lamp contol with logic circuit

    thanx audioguru for the fast reply. but i dont understand what you are trying to say.... does it mean that i need to add other components.. what should i add...? i dont have any clues.. im a newbie in electronics.... ??? thanx....
  9. C

    Lamp contol with logic circuit

    hi, I have simulated this circuit in Multisim and it works... but when i build it did work.. I have several question about this circuit. 1) do i need to add any other component for the real circuit (hardware) 2) i already put together the circuit using  SN74LS21N (AND gate), SN745LS04N (NOT...
  10. C

    0-30 Vdc Stabilized Power Supply

    I really need a program 2 simulate this circuit...... :-\ can anyone help?
  11. C

    0-30 Vdc Stabilized Power Supply

    hi, i am goin to make a report for this circuit and i need a simulation result attached.. but i cant find some of the components in my simulators.. please suggest the best simulator program.. p.s. i changed the TL081 with MC34071P thanx
  12. C

    temperature sensor with digital output

    can i use a uA741 to amplify the output of LM35DT..? what microcontroller should i use...? im a newbie in electronic circuits...... ??? thanx audioguru for ur fast reply
  13. C

    temperature sensor with digital output

    Hi, this is my circuit. I have several questions: a) i dont have any output at the VOUT (2) of LM35DT. Why? b) how can i replace the LED display with 7-segment display. What do i need to add? c) transformer with what current rating should i use? d) what brigde rectifier should i use?. Please...
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