1×Edge connector socket for micro:bit
1×2.1 mm center positive barrel power socket for 5 Vdc, 2/4 A, with eFuse chip turning off when voltage is not within 3~5.5 Vdc or current is above 4 A
4×Male pin header in 1×3 form factor for analog or digital servo control with precision 16-bit timer
8×Female pin header in GVS form factor for digital I/O or analog input
2×Screw terminal for controlling bi-directional brushed DC motor of maximum 1 A, with 8-bit PWM speed control (or one stepper)
4×Screw terminal for connecting 5 Vdc solenoids, relays, large LEDs, or one uni-polar stepper, providing high current Darlington 500mA drive outputs with kick-back diode protection
1×Screw terminal of 3-position for connecting micro:bit P16 to NeoPixels with 5 Vdc level shifter
1×Screw terminal of 2-position for connecting micro:bit P1 to Class D, 4-8 ohm speaker, 3W-max audio amplifier