Adding connection diagram and parts list

main.c

@@ -16,6 +16,32 @@
  *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+/*
+ * ATtiny25/45/85 connections:
+ *
+ *       +-\/-+
+ * Vcc  1|o   |8  Vcc
+ *  NC  2|    |7  NC
+ *  NC  3|    |6  IR_TX
+ * GND  4|    |5  IR_RX
+ *       +----+
+ *
+ * The ATtiny85 (http://www.sparkfun.com/products/9378) is generally the easiest to find
+ * 8-pin DIP AVR.
+ *
+ * IR_RX should be connected to the output pin of an IR Receiver Diode such as:
+ *  - TSOP85338 IR Receiver Breakout: http://www.sparkfun.com/products/8554
+ *  - TSOP38238 IR Receiver Diode (http://www.sparkfun.com/products/10266)
+ *
+ * IR_TX should be connected to a current-limited IR LED or a high-power switched LED,
+ * such as:
+ *  - LED Infrared 950nm (https://www.sparkfun.com/products/9349) with a 330 Ohm resistor
+ *  - Max Power IR LED Kit (http://www.sparkfun.com/products/10732)
+
+ * The IR Control Kit Retail (http://www.sparkfun.com/products/10783) from SparkFun
+ * Electronics contains everything you need to get started, other than the ATtiny25/45/85.
+ */
+
 #include <avr/interrupt.h>
 #include <avr/io.h>
 #include <avr/sleep.h>