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  1. 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...
  2. 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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