Pololu 3.3V, 2.5A Step-Down Voltage Regulator D24V25F3 ESP32/ESP8275 the PWM and Analog ports

the PWM and Analog ports are led out through the on-board STM32 MCU that can communicate with Raspberry Pi via I2C

Number of Digital Inputs 16 Digital Input Impedance 10kΩ Low Voltage Max (False) 900 mV DC High Voltage Min (True) 4

and all the while saving four GPIO pins from the Teensy itself

The ATECC508A chip is capable of many cryptographic processes

Pololu 3.3V, 2.5A Step-Down Voltage Regulator D24V25F3 ESP32/ESP8275 the PWM and Analog portsThis small synchronous switching step down (or buck) regulator takes an input voltage of up to 38 V and efficiently reduces it to 3. 3 V. The board measures only 0. 7 0. 7, but it allows a typical continuous output current of up to 2. 5 A. Typical efficiencies of 80% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. High efficiencies are maintained at light loads by dynamically changing the switching