ULN2003 is high operational volt and current driver, including 7 Darlington transistors as driving channels.
This is the SMD Version of the ULN2003 board, more reliable and higher quality.
- ONLY 4 channels used for driving steppers, four status LEDs respectively, you can only see it flashing when you slow down the signal.(as always)
- Separate power channel for power supply.
- JST XH2.54 stepper 5-wire interface for standard stepper, one COM VCC, and four signal GND.
Documentation: for schematic please refer to another version here, this only have components changed.