RPI AD/DA Extend Board SKU:EP-0022: Difference between revisions

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(Created page with "=RPI AD/DA Extend Board= ==Description== 通过PCF8591读取模拟电压的数值,并且可以驱动DAC模块,但是不能提供电流输出.可以通过Shell读取数值.测...")
 
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=RPI AD/DA Extend Board=
=RPI AD/DA Extend Board=
==Description==
==Description==
通过PCF8591读取模拟电压的数值,并且可以驱动DAC模块,但是不能提供电流输出.可以通过Shell读取数值.测量范围从0-5V.根据环境的不同,测量范围可能有差异.
This RPI AD/DA extend board reads analog voltage by PCF8591 chip, it can drive DAC module but can not offer power output. <br>
警告:因为转换速度太慢而且准确度较差,功耗较大,最差情况需要200mA,准备供应下一代产品.
It can be read by shell scripts and it can measure from  0V to 5V. It may has some different value due to different environment.<br>
'''Warnning'''
Because of the conversion speed is a little bit slow and poor accuracy , power consumption is large, worst case needs 200mA.
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Revision as of 17:44, 2 August 2016

RPI AD/DA Extend Board

Description

This RPI AD/DA extend board reads analog voltage by PCF8591 chip, it can drive DAC module but can not offer power output.
It can be read by shell scripts and it can measure from 0V to 5V. It may has some different value due to different environment.
Warnning Because of the conversion speed is a little bit slow and poor accuracy , power consumption is large, worst case needs 200mA.


Feature

1)通过I2C读取. 2)转换速度:小于1ksps 因为实在很低,不好意思说了,实际是11.1sps. 3)不带输入保护,需要注入输入范围. 4)模拟输出:250nA 不适用与驱动电路,请使用缓冲芯片进行扩大电流. 5)片上跟踪保持功能; 6)8 位逐次逼近 A/D转换; 7)Dimensions: 1.9cm × 3.35cm


Presentation



Package includes

  • 1x ...........

How to use

http://wiringpi.com/extensions/i2c-pcf8591/ 和 参照 http://www.52pi.net/forum.php?mod=viewthread&tid=813


Purchase Links

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52Pi Store