The PB-503 Desktop Proto-Board Design Workstation is ideal for analog, digital and microprocessor circuits. 

• Unconditional Life-time guarantee on all breadboarding sockets & 3-year warranty on all parts and workmanship.
• Ideal for analog, digital and microprocessor circuits
• New high & low buffered logic indicators
• 8 channel logic monitor
• New 8 selectable logic switches
• Function Generator with continuously variable sine, square and triangle waveforms and TTL pulses
• Triple output power supply offers fixed 5 VDC supply plus two variable outputs: