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标题: Arduino [打印本页]

作者: KuoiGuaBoarder 时间: 2014-4-27 11:55
标题: Arduino
[youtube]pcisMwOXMkA[/youtube]

作者: KuoiGuaBoarder 时间: 2014-4-27 12:19
标题: PWM
本帖最后由 KuoiGuaBoarder 于 2014-4-27 13:31 编辑

Pulse Width Modulation

PWM, is a technique for getting analog results with digital means. Digital control is used to create a square wave, a signal switched between on and off. This on-off pattern can simulate voltages in between full on (5 Volts) and off (0 Volts) by changing the portion of the time the signal spends on versus the time that the signal spends off. The duration of "on time" is called the pulse width. To get varying analog values, you change, or modulate, that pulse width. If you repeat this on-off pattern fast enough with an LED for example, the result is as if the signal is a steady voltage between 0 and 5v controlling the brightness of the LED.

http://arduino.cc/en/Tutorial/PWM

deep dig

作者: KuoiGuaBoarder 时间: 2014-4-27 12:46
标题: I2C

http://www.robot-electronics.co.uk/acatalog/I2C_Tutorial.html

作者: KuoiGuaBoarder 时间: 2014-4-27 13:47
标题: IO expander

KuoiGuaBoarder 发表于 2014-4-27 13:46
http://www.robot-electronics.co.uk/acatalog/I2C_Tutorial.html

The SDA and SCL lines enable i2c communication.

Which pins are SDA and SCL?
Uno, Ethernet: A4 (SDA), A5 (SCL)
Mega2560: 20 (SDA), 21 (SCL)
Leonardo: 2 (SDA), 3 (SCL)
Due: 20 (SDA), 21 (SCL), SDA1, SCL1

作者: luvski 时间: 2014-4-27 14:32
你要干哈？

作者: KuoiGuaBoarder 时间: 2014-4-27 15:51

luvski 发表于 2014-4-27 15:32
你要干哈？

找个大宝意来指导一下工作

作者: KuoiGuaBoarder 时间: 2014-4-29 20:12
[youtube]5cC34AtRmWo[/youtube]

作者: KuoiGuaBoarder 时间: 2014-5-3 12:11
哪位大侠能出手给解释一下：
Bus scheme VS key matrix

作者: KuoiGuaBoarder 时间: 2014-5-6 21:03
请教一个问题:

encoder vs potentiometer 区别在那里?

作者: KuoiGuaBoarder 时间: 2014-5-7 09:21

KuoiGuaBoarder 发表于 2014-5-6 22:03
请教一个问题:

encoder vs potentiometer 区别在那里?

同雪网就是牛，象个愿望树一样，只要写下来马上就知道答案了

作者: luvski 时间: 2014-5-7 19:19

KuoiGuaBoarder 发表于 2014-5-7 10:21
同雪网就是牛，象个愿望树一样，只要写下来马上就知道答案了

这么神奇？！

作者: KuoiGuaBoarder 时间: 2014-5-10 11:00
椅背上买的阿猪脑到货了

作者: KuoiGuaBoarder 时间: 2014-5-10 20:43
货到了，可以开工了

IMG20140510214320.jpg (97.72 KB, 下载次数: 38)

作者: KuoiGuaBoarder 时间: 2014-5-11 19:49
来个真相哈

IMG20140511204919.jpg (88.14 KB, 下载次数: 37)

作者: KuoiGuaBoarder 时间: 2014-6-1 05:51
技术层面的问题差不多了，怎么样做个漂亮的盒子呢，真愁人

IMG20140601065125.jpg (91.5 KB, 下载次数: 39)

作者: KuoiGuaBoarder 时间: 2014-6-1 07:42
I'm learning about electronics bit by bit, making projects and tearing things apart

I wish & believe there must be a light tower somewhere around corner of skichinese

作者: KuoiGuaBoarder 时间: 2014-6-15 09:12
花了一个星期焊了一块 IO extension board.

结果不按预期工作，还不知是什么原因，心里很难过

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