Lithium batteries for digital cameras and other applications can be expensive if you buy the original manufacturer's version. On the other hand, Ebay sellers offer clones of these batteries at much lower...
What is a "Null Modem" cable? If you need to connect two things via their serial (also known as RS232) ports, you need a cable. There are two sorts of these cables: 'normal' (or 'extension') cables, and...