89C2051 Demo Board with ULN2803 Interface
A general purpose 20 pin 89C2051 development board with on board power supply circuit, reset switch, power status LED and on board ULN2803 driver to drive the stepper motor, relays etc.
• On board ULN2803 driver to drive the stepper motor.
• DC plug-in jack for power input(12V AC/DC).
• Onboard bridge rectifier enables the board to accept both AC and DC input voltages.
• Onboard 5V regulator(LM7805) with filtering capacitors.
• Power Status LED(Red).
• Onboard quartz crystal 11.0592 Mhz oscillator circuit.
• Port extensions for all ports.