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Another capacitor question

I'm working out my understanding of capacitors, I'm a bit stuck on the differences between these 2:

Mono Cap from Jameco

vs.

Analog input - Not getting good readings

I am using a Sharp IR Analog Sensor (2 different ones, in fact) and the readings I'm getting on both are not 'correct'.  I'm using a PICAXE 28 & a Sharp GP2D120XJ00F or GP2Y0A21YK.

Mac OS X and PICAXE USB Cable

I have tried to get the USB cable that came with the PICAXE 28X1 to work on my MBP (OS X), without any luck.  I have tried finding advice online, reviewed the manual to no avail...

I loaded the AXE027 driver (as suggested in the manual) and then I went to System Preferences > Network and attempted to connect but I get the following error:

Could not negotiate connection with PPP server.  Please verify your settings and try again.