Oh my Darling(ton)

A project log for Wearable Haptic Sensor

A wearable haptic sensor for gaming

Marcel ChabotMarcel Chabot 06/25/2022 at 00:130 Comments

After the lack of success using constant current drivers, we continued to search for a driver that would be cost effective, off the shelf and easy to implement. The UNL2003AN is a common driver circuit used in small stepper motor drivers. ELEGOO 5 Sets 28BYJ-48 ULN2003 5V Stepper Motor + ULN2003 Driver Board Compatible with Arduino : Electronics

We won't need the entire circuit, but the ULN2003 circuit, which is a Darlington Transistor Array: ULN200x, ULQ200x High-Voltage, High-Current Darlington Transistor Arrays datasheet (Rev. P) (

Wiring this up to my prototype rig and it really works. It is simpler and more responsive than my initial level shifter rig, and adds the driver protections I need to protect the controller. So far so good. I'll continue to build out and test with this circuit and see how everything works.