This converter may help if just the serial port on a personal computer is free, whereas the printer needs a parallel (Centronics) port. It converts a serial 2400 baud signal into a parallel signal.

The tactile device is thin, flexible, and has 25 stimulation generating points within a 2 cm × 2 cm area. To achieve wearable, to install the driving circuit close to the device, we use high voltage ...