TAILIEUCHUNG - Robotics Part 5

Tham khảo tài liệu 'robotics part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 88 Robotics Inputs pinned opposite outputs to simplify board layout. Versions for all popular logic families. Description The ULN2801A-ULN2805A each contain eight Darlington transistors with common emitters and integral suppression diodes for inductive loads. Each Darlington features a peak load current rating of 600 mA 500 mA continuous and can withstand at least 50 V in the off state. Outputs may be paralleled for higher current capability. The output of the ULN2803 is inverted. This means that a HIGH at the input becomes a LOW at the corresponding output line. . if the motor line connected to pin 1 goes HIGH pin 18 on the ULN2803 will go LOW switch off . The ULN2803 is described as an 8-line driver. This means that it contains the circuitry to control eight individual output lines each acting independently of the others. The IC can be thought of as an 8-line black box. LM 324 IC FIGURE 14-pin DIP . LM324 Quad Operational Amplifier The LM 324 is a QUAD OP-AMP. Minimum supply voltage 6 V Maximum supply voltage 15 V Max current per output 15 mA Maximum speed of operation 5 MHz FIGURE Pin diagram of ULN 2803. Basic Electronics 89 Following a design process Choose an area of study _ I Write down in a few words the purpose of the project I Prepare a design beief Write down a specification Carry out research Use graphics computer software and other techniques to generate design ideas I Select the best design for further development FIGURE steps to design and create a project A design procedure is a series of steps which guide you through any electronic design-and-make process. Sticking to the procedure will help deliver a first-class product. Once you have defined the purpose of your project there are two important documents you need to write. These are The design brief is a short statement of the problem to be solved. The brief should outline the design problem you are tackling perhaps including one or two of the envisaged design features. The .

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