Difference: HD44780 (2 vs. 3)
Revision 32017-10-05 - uli
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The 2 line LCD display.A 2 line LCD display can be used to display simple information. When using an ADC to read voltages it can be used to show the results implementing like this a simple voltmeter. | ||||||||
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| < < | The display is driven by a HD44780 display driver from Hitachi. The data sheet explains all the details of this controller. The controller can be directly accessed through GPIO lines, which however requires quite a bit of cabling. The other possibility is to pass through a pcf8574 I2C I/O expander, in which case only the I2C connections SCL, SDA, Vcc and GND are needed. | |||||||
| > > | The display is driven by a HD44780 display driver from Hitachi. The data sheet explains all the details of this controller. The controller can be directly accessed through GPIO lines, which however requires quite a bit of cabling. The other possibility is to pass through a pcf8574 I2C I/O expander, in which case only the I2C connections SCL, SDA, Vcc and GND are needed. | |||||||
When developing the access library I saw that the programs failed in ~ 20% of the cases, while re-running the same binary again would make it work. The contrast was very bad also and I had to turn the contrast potentiometer to maximum in order to see the text. | ||||||||
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