Hello,
I've made a very simple microcontroller circuit with a PIC (40 pin with a chip socket), some LEDs, and a 20MHz ceramic resonator on perfboard. The whole thing works for the most part, flashing the LEDs in the test configuration like it should. Sometimes, however, when I touch the board (even just the edges), the LEDs stop flashing or slow down. Sometimes they flicker a bit. I'm wondering what are the possible causes of this that I should be aware of (particularly for future designs). Could it be poor solder connections, damage to the resonator from the heat of soldering, poor connections from the chip socket, or something else?
Thanks, transistor