Solder less bread board, on board DC power supply, 1MHZ pulse Generator with TTL/CMOS mode, pulsar switches, 8- bit data switches, Bicolor LED display with built in logic probe, BCD to seven segment display, CMOS/TTL outputs, functional blocks indicated on board mimic, self contained and easy to operate. Universal Lab Trainer, Model-uni lab-103: 3. Project Bread Board, Model-BB- 12V. Solder less bread board with built in variable power supply(0-+15Volt, 0-5volt at 500 amp) Project Bread Board, Model-BB-12: Solder less bread board with built in fixed power supply (+-12 volt, 5volt at 500amp).