The STM32F401 ‘Black pill’ development board is an updated version of the original F103 based black pill. This newer version features a more powerful Core-M4F based ARM CPU which brings with it a number of enhanced features, including more flash, SRAM memory, a Floating Point Unit, and an increased number of peripherals, including built in USB type-C OTG support. However, possibly the most amazing feature of this development board is the price. When compared to Atmel based Arduino development boards this little development board boasts a very impressive array of features for a fraction of the cost
