12-08-2017, 06:27 PM
I order most of my electronic parts from Chinese sellers on Ebay. I often lose interest in a project while waiting a month or so for the parts to arrive. Not so this time. My 8x8 analog switching matrices and 3.58 MHz crystal oscillators came in this week. I only need two of the switch ICs and one crystal for my project, but since everything is so cheap from China, I order a few extras so I won't have to wait another month if I ever need one again. I've spent most of the day today designing a call progress tone generator circuit and digging all of the other parts I need out of parts boxes in the lab. I'm going to start building the circuit board in the morning.
