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projects:i2c_pcf8574_8bit_port_expander [2012/10/21 18:24] elger |
projects:i2c_pcf8574_8bit_port_expander [2012/10/21 18:30] elger |
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| ===== The breadboard built ===== | ===== The breadboard built ===== | ||
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| + | The four resistors are 100Ω | ||
| + | |||
| + | The four LEDs are regular red 3mm leds | ||
| + | |||
| + | The four buttons are momentary on push buttons | ||
| ==== Fritzing ==== | ==== Fritzing ==== | ||
| Line 18: | Line 24: | ||
| ==== Breadboard ==== | ==== Breadboard ==== | ||
| I took a photo of the breadboard build, nice to see but difficult to see where what goes: | I took a photo of the breadboard build, nice to see but difficult to see where what goes: | ||
| - | {{ :projects:i2c_pcf8574_8bit_port_expander:2012-10-21_11-36-11_88.jpg?200 |}} | + | {{ :projects:i2c_pcf8574_8bit_port_expander:2012-10-21_11-36-11_88.jpg?200| }} |
| - | {{ :projects:i2c_pcf8574_8bit_port_expander:2012-10-21_15-52-19_558.jpg?200 |}} | + | {{ :projects:i2c_pcf8574_8bit_port_expander:2012-10-21_15-52-19_558.jpg?200| }} |
| ==== The code ==== | ==== The code ==== | ||
| Line 27: | Line 33: | ||
| I wrote code that reads the button input and writes this to the LED output: | I wrote code that reads the button input and writes this to the LED output: | ||
| - | <code> | + | <file c PCF8574.ino> |
| // I2C PCF8574 8 bit i/o port expander | // I2C PCF8574 8 bit i/o port expander | ||
| // by AEP | // by AEP | ||
| Line 79: | Line 85: | ||
| } | } | ||
| - | </code> | + | </file> |