Recent content by hanhao

Best software for low voltage single line diagram design and calculation what is the best software out there for low voltage single line diagram design and calculation?

what is Rated insulation voltage for relay? On the catalogue of a relay, it says "Rated insulation voltage (Ui) V 250 (IEC), 300 (UL, CSA)" it doesn't say its AC or DC. it also says "Dielectric strength (rms voltage) Between coil and contact a V 2500 Between poles a V 2500...

thanks for the ideas, ok i will check these out :wink:

although averaging does reduce the problem, it did not give much of an effective result. mouse cursor drifts lesser, but the drifting is still there. on the micro controller there is no frequency analysis feature, unless i program it myself. if i were to program a frequency analysis...

the micro controller takes ADC samples from a waveform like this, very highly zoomed in http://img133.imageshack.us/img133/9835/sampleir1.jpg what analysis should i do?

yes i did average averaging does help reduce "jumping mouse", but it still causes the problem

Noise handling algorithm in 8 wire touch screen here's how a touch screen work http://focus.ti.com/lit/an/slaa298/slaa298.pdfProblem: when the touch pen is stationary on a point and reading ADC values from a touch screen using the micro controller, the ADC values are never the same eg, 1st...

thanks for the reply, never mind i got it

concept of resistive touch screen, anyone an IEEE member? hi, i am having a problem with my 8 wire resistive touch screen the cursor keeps drifting about due to analog noise i suppose i would need to program an algorithm to clean up the noise to keep it stationary. i have tried putting a...

no, that's way beyond my scope all i need is the final expression

what is the magnitude and angle of this complex number? in terms of a and b? http://img364.imageshack.us/img364/4262/1af2.jpg come i need some help

is there anyway to design a systematic way to calculate the 3 unknowns when cramer rule fails?

i usually solve 3 unknown sim equations using cramer's rule because it's systemic and fast, however today i encountered an equation that cramer's rule failed against age old tradition elimination and substitution method -2A + B = -2 -2A - B - C = -4 2A - 3B - C = 0 usually i don't...

these 8 http://img407.imageshack.us/img407/8582/16sr.jpg

what's the best way to remember the 8 Fourier integral/summation definations can anyone think of good memory aid?