http://tuxgraphics.org/electronics
Content:
By Guido Socher |
Mini 3 digit display, an inexpensive digital voltmeter moduleAbstract:
We build a simple and inexpensive three digit display.
It's a voltmeter module but it has also general purpose
digital IO pins. You could use it as well to read a digital
sensor and display the value.
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ADCread * 2.56V * Rx Vmeasure = --------------------- 1024 * (Rx + Ry)This is the formula implemented in the file analog.c Dependent on what kind of voltmeter you want you can choose appropriate values for Rx and Ry and calculate the voltage range:
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2009-05-16, generated by tuxgrparser version 2.57