A suitable motor with desirable speed control is required for accurate positioning of displayed characters. It was difficult to synchronize motor speed with micro-controller delay.
Cost and Time Requirement:
Cost of Motor- Tk 500.
Cost of Micro-controller ATmega-16- Tk 350
Cost of Micro-controller programmer- Tk-1000
Cost of making structure- around Tk 700 to Tk 800
Where to get things from:
Stadium Market for ICs. Patuatuli, Old Dhaka for motor. Wooden structure was made from furniture shop.