In the forum we get questions like ‘what PIC should I use’ or ‘is this the right PIC for my purpose?’. We mostly use big PICs with lots of I/O, plenty RAM, and heaps of Flash. Not because we really need them, but because we are lazy and sloppy coders.
We tend to forget about the smaller chips. Today we were surprised to see so many features crammed into the PIC 12F family of chips. There are 8 pin uCs crammed with functions like multiple timers, EUSART, PWM, Capacitive touch, ADC, DAC, onboard 1% oscillators. Best of all, many come dirt cheap, under $1 in low quantities.
We will talk about the current flagship of the 12F family: 12(L)F1822. These cute little device come in hobbyist friendly 8-pins DIP- and SOIC- or an Ian-terrifying DFN-package. The DFN is a 3x3mm flat chip that is just 0.9mm thick and can be used when space is a serious issue.
Mouser dropped off with 25 of these little PICs in 3x3mm DFN package, and we started right away soldering it to a test board. It was doable but it took quiet a time before our Pickit3 talked to it. We photographed the whole process and will post about it soon, but first we need a drink!
What could you design with little baby?