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 IR remote sends short bursts of 38 kHz infrared light, in a different on-off pattern for each button on the remote. While the IR receiver detects these bursts it sends a 0 the Propeller I/O pin, and a 1 when it does not. The sirc library does the work of decoding the on-off pattern detected by the I/O pin.