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projects:i2c_pcf8574_8bit_port_expander [2012/10/21 18:26] elger |
projects:i2c_pcf8574_8bit_port_expander [2012/10/21 18:32] elger |
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===== The breadboard built ===== | ===== The breadboard built ===== | ||
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+ | The four resistors are 100Ω | ||
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+ | The four LEDs are regular red 3mm leds | ||
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+ | The four buttons are momentary on push buttons | ||
==== Fritzing ==== | ==== Fritzing ==== | ||
Line 14: | Line 20: | ||
Fritzing can also make a schematic, I've included it here but it looks horrible. When I make the final design on a PCB I will use [[http://www.cadsoftusa.com/|Eagle]] for this. | Fritzing can also make a schematic, I've included it here but it looks horrible. When I make the final design on a PCB I will use [[http://www.cadsoftusa.com/|Eagle]] for this. | ||
- | {{ :projects:i2c_pcf8574_8bit_port_expander:pcf8574-arduino-io_schem.png?200|}} | + | {{ :projects:i2c_pcf8574_8bit_port_expander:pcf8574-arduino-io_schem.png?200 |}} |
==== 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 ==== |