Differences
This shows you the differences between two versions of the page.
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electronic:lcd:start [2022/09/28 09:52] tony [LCD module Datasheets] |
electronic:lcd:start [2023/04/02 16:38] (current) tony |
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| ====== Determining pinout ====== | ====== Determining pinout ====== | ||
| - | The first thing to do is determine the power supply pins. Ground is often connected to the LCD frame. Care should be taken if it is suspected to require a 3.3V power supply, most old LCDs only run off 5V. If the LCD is from old equipment, examining that is the easiest way to determine the power requirements. If you just connect the power and 'contrast' supplies you will usually get a display of some character cells as solid blocks: | + | The first thing to do is determine the power supply pins. Ground is often connected to the LCD frame. Care should be taken if it is suspected to require a 3.3V power supply, most old LCDs only run off 5V. If the LCD is from old equipment, examining that circuit is the easiest way to determine the power requirements. If you just connect the power and 'contrast' supplies you will usually get a display of some character cells as solid blocks: |
| {{:electronic:lcd:p4013008a.jpg?400|Power on without data or control connected}} | {{:electronic:lcd:p4013008a.jpg?400|Power on without data or control connected}} | ||
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electronic/lcd/start.txt · Last modified: 2023/04/02 16:38 by tony
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