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--- projects:i2c_pcf8574_8bit_port_expander [2012/10/21 18:24]
elger
+++ projects:i2c_pcf8574_8bit_port_expander [2016/11/16 13:06] (current)
@@ Line 7: / Line 7: @@
 ===== The breadboard built =====
+The four resistors are 100Ω
+The four LEDs are regular red 3mm leds
+The four buttons are momentary on push buttons
 ==== 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.
-{{ :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 ====
 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 ====
@@ Line 27: / Line 33: @@
 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
 // by AEP
@@ Line 79: / Line 85: @@
 }
-</code>
+</file>