Digital/Aanlogue Electronics prototyping board. Ideal for teachers, students, class rooms
Features:
    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: ±1.3 to ±15VDC
    Two Digital Pulsers
    Audio experimentation speaker
    New removable breadboard area and optional additional breadboard socket plates
    Multiple features in one complete test instrument saves hundreds of dollars necessary for individual units
    Switchable 120VAC - 220-240VAC (small slide on the back of each unit)
    Unconditional Life-time guarantee on all breadboarding sockets & 3-year warranty on all parts and workmanship.
PB-503 Analog/Digital Electronic Workstation is a versatile, time-saving tool
for circuit designers, engineering technicians, students, and hobbyists. A large
breadboard area and a wide choice of built-in circuit accessories allow rapid and
accurate construction of virtually any type of analog or digital circuit.
Circuit power is provided by three power supplies, two variable and one fixed. The
circuit breadboard area includes over 2500 contact points. A multiple-waveform
function generator supplies sine, triangle, and square wave output for analog circuits.
A built-in speaker may be used for analog output.
Outputs also include a TTL-level square wave generator, two debounced pushbutton
switches, and a bank of eight logic switches. Eight logic indicators may be used
to display high and low logic levels. Two built-in potentiometers and two SPDT
switches are provided for circuit control and adjustment. Connections to external test
equipment or signal sources may be made using the two BNC connectors on the PB-
503.
The PB-503 eliminates the clutter and confusion that often results when constructing
sophisticated circuits. Alligator clips and similar connectors are seldom needed.
Sockets on the PB-503 allow insertion of components or wires of up to 20 gauge.
A detailed panel layout and description of the PB-503 is given in the section
“Description of Individual Features”.
2 Features & Applications
The PB-503 Analog & Digital Design Workstation is a robust electronics trainer
suitable for all levels of electronics instruction and design. Utilizing the PB-503,
students will learn valuable hands-on breadboarding techniques and build a solid
foundation in circuit experimentation, construction and analysis. Experienced
designers will find the PB-503 an invaluable instrument, providing a reliable platform
for the most advanced and demanding design applications. The PB-503 can be used
to construct basic series and parallel circuits to the most complicated multi-stage
microcomputer circuits, incorporating the latest in industrial technology. Use the PB-
503 to construct a wide variety of experiments, including but not limited to.
Opto-Device Circuits
Clocks
Multivibrators
Oscillator Circuits
Timers
Function Generator Circuits
Logic Circuits
Gates
Counters
Flip-Flops
Analog-to-Digital Converters
Digital-to-Analog Converters
Medium Scale Integration Circuits
Phase Lock Loops
Operational Amplifiers
Electronic
Fundamentals Digital Electronics
Fundamentals of Electricity Number Systems & Codes
Ohm’s Law Binary, Decimal, Hexadecimal, Octal &
ASCII
Series Circuits Logic Gates & Boolean Algebra
Parallel Circuits Combinational Logic Circuits
Combinational Circuits Flip-Flops
Current Control Digital Arithmetic
Closed, open, shorts Counters & Registers
Switches Integrated Circuit Logic Families
Thevenin’s Theorem TTL Logic
Wheatstone Bridge MOSFETS
Capacitors CMOS
Inductors Interfacing CMOS & TTL
Phase Shift Circuits Medium Scale Integration
Impedance Decoders
Resonant Circuits Encoders
Transformers Data Conversion & Acquisition
Rectifiers & Filtering Microcomputer Concepts
Integrated Circuits
Transistor Amplifiers
Oscillators
Power Control Circuits
 
SPECIFICATIONS
Description Specification
AC Line Input 115 VAC @ 60Hz or 230 VAC @ 50 Hz
(switchable)
Power Supplies
Fixed DC: +5 VDC 1.0 A max, current limited
Ripple <5 mV
Variable DC: +1.3V @ 150 mA to +15 VDC @
500 mA
Ripple <5 mV
Variable DC: -1.3 VDC @ 150 mA to -15 VDC @
500mA
Ripple <±5 mV
Binding Posts (4) Ground, +5VDC, Variable ±VDC Power Supply
Outputs
Pulsers
(2) Pushbutton-operated, open-collector output
pulsers. Each with 1 normally-open, 1 normallyclosed
output. Each output can sink up to 250 mA.
Function Generator
Frequency Range: 0.1 Hz
to 100 kHz in six ranges
Output Voltage: 0 to +10Vp-p into 50 Ω Load
(20Vp-p in open circuit), short circuit protected
Output Impedance: 600 Ω except TTL
Output waveforms: Sine, Square,Triangle & TTL
Sine Wave Distortion: <3% @ 1 khz typical
TTL Pulse: Rise & fall time <25 ns,
drive 100 TTL Loads
Square Wave: Rise and fall times <0.5 μs
Logic Switches
(8) Logic Switches select
Logic High and Logic Low
Logic Low Level: Ground
Logic High Level: Switchable between +5 V and
the variable positive power supplies.
Switches (2) Single Pull Double Throw (SPDT) -
uncommitted
Logic Indicators
LEDs: 16 LEDs; (8) red to indicate logic high and
(8) green to indicate logic low
Logic High Threshold: 2.2 V (nominal) in TTL/+5
V mode, 70% (nominal) of selected operating
voltage in CMOS mode
Logic Low Threshold: 0.8V (nominal) in TTL/+5
V mode, 30% (nominal) of selected operating
voltage in CMOS mode
Connectors (2) BNC - uncommitted
Potentiometers (2) 1 kΩ and 10 kΩ - uncommitted
Speaker 8 Ω, 0.25 W - uncommitted
Breadboards
Removable Plexiglas Socket Plate (PB-3) with
2520 tie-points with 200 additional bus strip
tie-points internally connected to power supply
outputs and ground
Weight 7 lbs
Dimensions 6.5” x 16” x 11.5”
6
Package Contents
1x Global Specialties PB-503 Analog and Digital Design Workstation Prototyping Board
1x Mains Cable
1x Manual
Condition
New & unused but does not come with the original box
Comes with US cable, any 3-pin cable would work, or you can get US-EU adapter.
Suitable for both 230V and 120V. There is a switch at the back
Suitable for Schools, prototyping, excellent for learning, building electronics. 
All in One Electronics prototyping board. 
Includes Function Generator, Variable DC generator, Logic Switches, removable breadboard.
Getting all those equipment would cost you a lot more.
Portable all in one unit
Quality Engineering by Global Specialties 
Made in USA!