Now we do our conversions just like above. 121.779 / 5280 = .023 miles .94 / 60 / 60 = .000261 hours .023 / .000261 = 88.12 mph. So there you have it! How to calculate how fast you throw a baseball without a radar gun and only a stop watch.
IR Receiver and Remote. An IR receiver can detect bursts of infrared light sent by a common remote controller (like for a television), and then output a pattern of high/low signals to a Propeller I/O pin. This quick tutorial will first show you how to wire up the infrared receiver.
The near infrared is also where conventional night vision systems and infrared remote controls operate. Thermal imaging equipment generally operates in the far infrared region - waves as much as 15 times longer than near infrared light - although some types make use of mid infrared (or both far and mid infrared).