diff --git a/main.c b/main.c
index 09fae8e..8bb11c7 100644
--- a/main.c
+++ b/main.c
@@ -16,6 +16,32 @@
* along with this program. If not, see .
*/
+/*
+ * 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
#include
#include