I2C/SPI Character LCD BackPack | 292
Reference Design using part MCP2300 by Adafruit Industries
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Associated Documents
For End Products
- LCD Backlighting
Description
- LCD backpacks reduce the number of pins needed to connect to an LCD. LCDs are a fun and easy way to have your microcontroller project talk back to you. Character LCDs are common, and easy to get, available in tons of colors and sizes. We've written tutorials on using character LCDs with an Arduino (or similar microcontroller) but find that the number of pins necessary to control the LCD can be restrictive, especially with ambitious projects. We wanted to make a 'backpack' (add-on circuit) that would reduce the number of pins without a lot of expense. By using simple I2C and SPI input/output expanders we have reduced the number of pins (only 2 pins are needed for I2C) while still making it easy to interface with the LCD
Key Features
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Interface StandardsSPI|I2C
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Supply VoltageSingle(5) V
Featured Parts (15)
| Part Number | Manufacturer | Type | Description | |||
|---|---|---|---|---|---|---|
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SN74LS595DG4 | Texas Instruments | Counter Shift Registers | Shift Register Single 8-Bit Serial to Serial/Parallel 16-Pin SOIC Tube | Buy | |
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MCP23009T-E/SS | Microchip Technology | GPIO Expanders | I2C Interface 3400kHz 5.5V 20-Pin SSOP T/R | Buy | |
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MCP23009-E/SS | Microchip Technology | GPIO Expanders | I2C Interface 3400kHz 5.5V 20-Pin SSOP Tube | Buy | |
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MCP23009-E/SO | Microchip Technology | GPIO Expanders | I2C Interface 3400kHz 5.5V 18-Pin SOIC W Tube | Buy | |
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MCP23008-E/ML | Microchip Technology | GPIO Expanders | I2C Interface 1700kHz 5.5V 20-Pin QFN EP Tube | Buy | |
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MCP23008-E/SO | Microchip Technology | GPIO Expanders | I2C Interface 1700kHz 5.5V 18-Pin SOIC W Tube | Buy | |
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MCP23008T-E/ML | Microchip Technology | GPIO Expanders | I2C Interface 100kHz/400kHz/1700kHz 5.5V 20-Pin QFN EP T/R | Buy | |
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MCP23008T-E/SS | Microchip Technology | GPIO Expanders | I2C Interface 1700kHz 5.5V 20-Pin SSOP T/R | Buy | |
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MCP23009T-E/SO | Microchip Technology | GPIO Expanders | I2C Interface 3400kHz 5.5V 18-Pin SOIC W T/R | Buy | |
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MCP23008T-E/SO | Microchip Technology | GPIO Expanders | I2C Interface 1700kHz 5.5V 18-Pin SOIC W T/R | Buy | |
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MCP23009-E/P | Microchip Technology | GPIO Expanders | I2C Interface 3400kHz 5.5V 18-Pin PDIP Tube | Buy | |
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MCP23008-E/P | Microchip Technology | GPIO Expanders | I2C Interface 1700kHz 5.5V 18-Pin PDIP Tube | Buy | |