Recent content by zak8000

hi guys I am attempting to solve a problem that has me scratching my head. I have a small connector PCB with one 8k resistor present. The connector is four way with the resistor terminals being the two inner pads. The outer two pads are short circuit together. I solder two wires on the...

hi there I am currently working with linear flows and using a ultrasonic setup to determine the speed of sound in a linear gaseous flow. But I would like to know more about the speed of sound in a vortical flow. Unfortunately I haven't been able to find any good book with regard to my topic...

hi I know the Fourier transform of a lorentzian function is a lorentzian but i was wondering if the Fourier transform of the second derivation of a lorentzian function is also a second derivative of a lorentzian function Thanks

hi the differential equation i am attempting to solve is: \frac {dP} {dx} = \frac {gP} {1+P/Psat} here is what I have done: \frac {dP} {dx} = \frac {gP*Psat} {Psat+P} divide both sides by \frac {Psat+P} {gP*Psat} to get: \frac {Psat+P} {P*Psat} \frac {dP} {dx} =g...

ok thank you will look into it

what does normalization mean? for example say i have the guassian input as : A(0,T) = \sqrt{Po}*exp(-T^2/2To^2) then we can normalize it by defining t=T/To and A(z,T) = \sqrt{Po}U(z,t) Po= peak power t= normalized to the input pulse width To. if the peak of the pulse is...

Hey guys, I have a good job lined up for me after I graduate with a good company, i am currently 8 months away from graduation. I have a diffcult desicion to make about my final year project. I have been offered projects from two companies and one of them is the one i start working for at the...

Hi i was wondering what's is the difference between electromagnetic waves and fields or is a field just a number of electromagnetic waves. also i was wondering is it possbile to have an electromagnetic wave where there is only a magnetic field and no electric field and vice versa Thanks

so if i wanted to measure the total power dissipation for this circuit would be 59W ?

Hi if i have a voltage supply of 100V connected across a 66 ohm resistor which has a power rating of 155W. then P=V^2/R=10000/66=151W but say if i had the same situation except i add another resistor in series to increase the resistance of the overall circuit by adding a 100 ohm resistor...

well i connected a 0.1uH inductor to a signal generator which generated 5V ac voltage and then i added a resistor connected to the inductor and ground. then i measured the voltage across the 10 ohms resistor on a oscilloscope and at was the same as the input so that's why i wondering if i...

hi i was wondering if we would treat inductors and capacitors as short circuits for AC voltages. i am aware that there is a 90 degrees phase shift in a RC or RL circuit with an ac voltage but the phase shift only applies to the current. thanks

hi there i am looking for monochromatic colored filters like on the picture on the following web page: http://en.wikipedia.org/wiki/File:Filter-optics-1.jpg (preferably with no reflectivity) but i have had no luck trying to find them while looking on google

hi i bought a machine which determines led colours by measuring intensity for a product. the product has three leds:green,red,orange. the equipment works well for the green and red leds but fails most of the time with the orange leds. i looked up wavelength values for the colours and i...

thats super cheap and awesome bassalisk i going to order one after i test the one i am building and colin thanks for the tip i have ordered a 18-pin IC pin socket. do you think it would be safe to put the cct together on a breadboard and connect to my pc via the RS232 female connecter