For a couple projects I am working on I have been trying a small STM32 board? I found on e-bay and other locations.? It is commonly known as the blue pill.
http://www.ebay.com/itm/STM32F103C8T6-ARM-STM32-Minimum-System-Development-Board-Module-For-Arduino-D-/112035273840?hash=item1a15d29c70:g:CioAAOSwMNxXaqSp
Same width as a Nano and a just a little longer.?? STM 32 processor running at 72 MHz., 20kb ram? 65kb or 128 kb program memory.? Available for under $4 from several sellers.? The sample sketches I have tried seem to work well.? In the process of trying a QVGA TFT display with it.
DuWayne KV4QB
