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  1. monoman

    Workings of a basic calculator?

    a calculator is able to differentiate between denary numbers (1,2,3..) by storing them as binary numbers in digital memory (like ascii in programming). when you press say number 2 on the calculator, the calculator will recall the binary number 1 0 from its memory. all of the calculations done by...
  2. monoman

    digital question

    maybe i understand you?.... in boolean algebra the 'Bar' above a letter means that it is the inverse value, therefore by having two bars above a letter it is the inverse of the inverse value, meaning the normal value. hence the bars can be cancelled out in the same kind of way that two minus's...
  3. monoman

    digital question

    so you are trying to build the circuit using only NOR gates instead of X-OR and AND gates? can you post the circuit?
  4. monoman

    digital question

    I am not too good at using boolean algebra but I can tell you that the half adder has four possible combinations at the input (0+0,0+1,1+0,1+1) but only three possible outputs. The reason being is that inputting 0+1 will give the same output as inputting 1+0. the output that will be given is 1...
  5. monoman

    capacitors/resistors in parallel

    I meant to say thru a parallel resistor not capacitor. sorry bout that!
  6. monoman

    capacitors/resistors in parallel

    hi I have this formula for discharging a capacitor thru a series resistor: V=[V0]e^(-t/RC) is there a similar formula for discharging a capacitor through (or across) a parallel capacitor? (i.e. where the voltage across the capacitor after a time t is modelled by the capacitance, resistance...
  7. monoman

    radio

    thank you walid! no doubt i will get back to you
  8. monoman

    radio

    hi, I have been trying to learn all about how radio works, and ive looked at quite a few resources about it. I know that you need to create a carrier wave and then put the data onto it with a modulation signal, and that the carrier wave is produced at the transmitter by putting an alternating...
  9. monoman

    RC sites?

    thanks! loadz of info! ;)
  10. monoman

    RC sites?

    hi, I have a grasp of some basic electronics (analogue and digital) and am trying to get started learning about RC circuits as its something ive never bothered to look at before. i would really appreciate some good links on this topic where i can learn about basic RC circuits and everything...
  11. monoman

    monostable-astable

    hi i am fairly new to electronics and this is the first time i have used this site, hopefully i can use it to clear up some questions i have about various electronics problems. i have some basic components and have managed to build a circuit using the 555 chip that converts direct current to...
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