doppler
The doppler is a Cortex M4F Microcontroller + FPGA development board. It comes in the same tiny form factor similar to a Teensy and is open source.
 
 features
• 120Mhz ARM Cortex M4F MCU 512KB Flash (Microchip ATSAMD51G19A) with FPU
 • FPGA 5000 LUT, 1MBit RAM, 6 DSP Cores,OSC, PLL (Lattice ICE40UP5K) 
• Arduino IDE compatible 
• Breadboard friendly (DIL48)
 • Micro USB 
• Power over USB or external via pin headers 
• VCC 3.5V …. 5.5V • All GPIO Pins are 3.3V 
• 1 LED connected to SAMD51
 • 4 x 4 LED Matrix (connected to FPGA) 
• 2 User buttons (connected to FPGA)
 • AREF Solder Jumper
 • I2C (need external pullup), SPI, QSPI, USART Pins 
• 2 DAC pins, 10 ADC pins 
• Pinout here
• Full open source toolchain 
• SWD programming pin headers 
• Double press reset to enter the bootloader
 • UF2 Bootloader with Firmwareupload via simple USB stick mode (Mass Storage Device)
Role
 Communications, hardware design
Credits
 Ideation & Software: Sven Braun
Open Source
 Hardware: https://github.com/dadamachines/doppler 
 Software: https://github.com/dadamachines/doppler-software
Press
 Create Digital Music