English
资源说明：physical indicator using Arduino
README May 28, 2012 wwward@pobox.com William W. Ward Copyright 2012 (Licensed as GPL) What it is: A simple Arduino sketch and a simple bash script. The script progressMeter.sh takes the serial port path (under Unix) and an integer value 0-99 and transmits that as a byte to the serial port. The Arduino sketch reads the byte from the serial port and maps it as a value, 0-254 using the Pulse Width Modulation feature of the Atmega to control an attached voltmeter. The nominal output in a simple Arduino setup with a meter will be within the range 0-5 volts. Some meters may require a negative voltage to pull the needle down to zero if their springs are such that they don't automatically home to 0 volts (apparently my old meter won't return to 0 unless it's pulled down.) You can attach anything you like, realistically, but you'll have to deal with calibrating the PWM output to fit the input range of the indicator. If it's an LED, it will have a narrow range where it emits light starting at some minimum voltage up to its rated maximum, which is usually less than 5v. This is a trivial implementation and clearly the code is extremely brittle. However, I wanted to get the proof of concept running for my own amusement. - wwward
本源码包内暂不包含可直接显示的源代码文件，请下载源码包。
