I just purchased a new Samsung mp3 player which comes with USB support but does not have a standard USB connector. Instead, the USB connection is the same as the headphone jack. The USB cable itself goes from a type A USB to a 4 electrode audio plug. If I want to listen to music, I disconnect it...
Does anyone have experience buying used or refurbished test equipment? Where are some good places to go? I've googled a few places but I have no idea if they are refutable. I'm to outfit my lab but don't need (and can't afford) the latest and greatest of equipment. I am geographically in the US.
I have been asked to investigate the possibility of generating a large voltage from a 3V battery. The specifications are vague at the moment but for now the range may be anywhere from 50 to 200V (single or dual supply). This is for a portable piezo driving application. Aside from charge pumps...
I am currently generating an AC sinusoidal signal for approximatley 60ms across two electrodes. However, after I shut off the function generator signal, there appears to be some post electrical ringing and reflection that I would like to eliminate. I would like to short the two electrodes...
