There is a range of PIC microcontrollers that manages to squeeze a large number of features into a tiny 8-pin package. The 8-pin device most like the PIC16F54 is the PIC12F508 (the 12 in the name ...

An inductor and 8-pin microcontroller are all that make up ... is exactly the same except it used an AVR chip. This one uses a PIC 12F683 but should work with just about any 12F or 16F model.

[Dmitry Gr.] built a simple circuit to playback digital audio. At the center you can see an 8-pin PIC 12F1840 microcontroller. It’s pulling audio data from a microSD card which is read through a ...