This isn’t really PIC vs AVR. I’m not going to get into technical details about both chips. They are both excellent, cost effective and have good software tools. The reason I, and most people probably are using AVR is because of Arduino. But there comes a time to move away from the Arduino platform and
I never thought i’d do it.. make a Z80 computer, maybe I had it in my head it was too complicated.. but I have done it. So far my Z80 is running an LED display using the Intel 8279 display and keyboard controller, interfaces with an ADC the ADC0808 which is a parallel 8 channel
Synthesizer II is the next much improved model from my first design. This is a 4 voice (voices are what cost) with analog envelope generators, a CEM style AS3320 low pass filter with full digital controls. The case is nearly completed, just waiting some more components before I start to fit it all together.