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electronic:lcd:start [2026/09/26 09:50] – tonyelectronic:lcd:start [2026/09/26 21:02] (current) – tony
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 On the [[:electronic:lcd:sidebar|sidebar]] there is a list of LCD modules that I have recovered from various pieces of scrap equipment and the linked pages include pinouts and whether there is an Arduino driver for them. On the [[:electronic:lcd:sidebar|sidebar]] there is a list of LCD modules that I have recovered from various pieces of scrap equipment and the linked pages include pinouts and whether there is an Arduino driver for them.
  
-====== LCD types ======+===== LCD types =====
  
 **TN** (Twisted Nematic) **TN** (Twisted Nematic)
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 **Transflective** LCDs have both reflecting and transmitting properties and can be viewed in direct sunlight and with a backlight for low light environments. **Transflective** LCDs have both reflecting and transmitting properties and can be viewed in direct sunlight and with a backlight for low light environments.
  
-====== Common LCD module pinouts ======+===== Common LCD module pinouts =====
 ^1|Gnd|Gnd|Gnd|Gnd|Gnd| ^1|Gnd|Gnd|Gnd|Gnd|Gnd|
 ^2|Vdd|Vdd|Vdd|Vdd|Vdd| ^2|Vdd|Vdd|Vdd|Vdd|Vdd|
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 **Data** : Serial data, **SCK** : SPI clock, **STB** : Strobe, **V0** : Contrast, **Vdd** : +3.3V or +5V, **Gnd** : Ground **Data** : Serial data, **SCK** : SPI clock, **STB** : Strobe, **V0** : Contrast, **Vdd** : +3.3V or +5V, **Gnd** : Ground
  
-====== 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 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: 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:
  

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electronic/lcd/start.1790416241.txt.gz · Last modified: 2026/09/26 09:50 by tony
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