Checkpoint LAB USB-RS232 Manual de usuario descargar pdf (Pagina 11)

H BRIDGE

BUY OR BUILD H BRIDGE?

• Your project’s Needs!

• Cost?

• Reliability?

• Features?

• If you buy an H Bridge, there are 100’s to pick from! For your DC

motor, know your voltage and current specifications. As an example

of a small H bridge,

http://www.ti.com/lit/ds/symlink/drv8837.pdf

• This “small power” IC drives a 11V at 1.8A DC motor.

• Has a brake function, arc suppression (they all do….)

STEP 4. CONTROLLERS AND

PROTOCOLS

• Refer to Dr. Gomez’s Lecture.

• WARNING: Arduinos – Good for component tryouts but

typically lacks data rate performance for projects. Good for

quick circuit tryouts from motors to IMU’s but once integrated

often lacks needed performance.

• Not a resume builder at Career Fair. Viewed as a hobby toy.

• Vast libraries and examples make it appealing.

• WARNING: Serial Interfaces - I2C, SPI, CAN may be difficult to

implement.

• Unless you have first hand experience or plan to purchase closely

integrated interface solutions.

• If a serial interface is needed and the project data rate is “slow”, then

the old and trusted RS232 protocol is trustworthy.

• Self defined protocols are lacking in needed data sync’ing.

• For digital wireless select proven Bluetooth, Zigbee protocols.

• Borrow a Protocol Data Analyzer – See Prof. Slack

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Checkpoint LAB USB-RS232 Manual de usuario Pagina 11