Nowadays, cpld and fpga have been the first-choice components for the designers. It is suitable for the designers on application for communication, industrial automation, intelligent instrument, image processing, extensive engine control, etc. In order to allow users have excellent experimental platforms, leap series has provided platforms based on altera or xilinx. Enabling engineers to realize the designs of logical circuit from experimental units. test content combined logic design, simulation and test 1. Basic logic 6. Multiplexer 2. Deducter 7. Adder 3. Decoder 8. Compiler 4. Combined logic 9. Demultiplexer 5. Comparator sequential logic circuit design, simulation and test 1. Flip-flop device 2. Shift register 3. Shift counter register 4. Synchronized counter 5. Non- synchronized counter