monoman

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

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 and initial voltage) thanks, monoman

thank you walid! no doubt i will get back to you

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 voltage across it. there is a couple of points: > how can you put an alternating voltage along a single piece of wire(transmitter) which is only connected to the circuit at a single point? doesn't there need to be an electrical potential at both ends? > does a reciever need to be providied with an oscillating electrical signal too, or does a radio wave simply hit a transmitter producing the modulated signal through the wire? >also a couple of circuit diagrams would really help (I am particularly interested in Frequency modulation radio) Thank you very much, Monoman :)

thanks! loadz of info! ;)

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 involved with them. thanks for any help, monoman

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 alternating current. Do i refer to this circuit as a 'monostable multivibrator' , or an 'astable multivibrator', and what exactly is the difference between the two? any help appreciated, monoman ;)