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  1. nikhil arora

    Serial communincation between two Microcontroller using IR

    I want to make serial communication between two microcontroller using IR. but i donot want to use IR reciever moudels (from vishay) instead i want to use simple IR led as  transmitter and IR photo-diode as reciever. to decrease the cost.
  2. nikhil arora

    interface relay to 8051 uc

    how much curret ur 12v device uses if it is using less current (<500mA) then u can use ULN2003 to control that device it is very easy to use  with controller. if it is less then 1A then u can connect two or three ouput of uln2003 for more current. Solid state switch are better than relay...
  3. nikhil arora

    equivalent of these FETS and transistors

    can any one suggest me equivalent of these these are not avliable in my city. Si9410DY MTD20N03HDL ZTX694B thanks in advance
  4. nikhil arora

    3-5V DC @50mA from 230V AC without transformer

    Can any one suggest a Circuit for getting 3-5V DC @50mA from 230V AC without transformer or any other ways.
  5. nikhil arora

    5V to 12V with 750mAh

    I have a battery backup system with 6V SLA(lead acid) battery, But few ckts work on 12V which are used rarely. but they are important. so how do i get it. I know I need step-up DC-DC converter I will be glad to know the chips and links to their datasheets. I have gone through...
  6. nikhil arora

    RF 433 or 315Mhz module antenna problem

    I have attached the schematic diagarm with little explanation on it. the main part we have to see is the Antenna ouput of the RF module. We have to connect this ouput to the antenna for this we use tracks to the antenna connector on PCB. Now for short distances we can use this track(if made...
  7. nikhil arora

    multisim 7 problem adding new components

    how i can get new components in multisim 7 i want to add few more ic like cd4538 etc. how can we do that
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