Freescale smart car speed sensor photoelectric Kit

Products for photoelectric speed sensor, including the sensor and code disc two parts, this product is cheap, easy to install, and very light weight, the pursuit of high-speed intelligent car player, this is the perfect gun equipped!

Gun tube technology parameters:
For pipe manufacturers: Hewlett-Packard HP Original
Supply voltage: 5V
Wiring: Red 5V black GND
Output signal: 5Vp-p two-phase signal output (see below).
Two signal lines, a yellow one blue (due to different production batches, sometimes the signal line may be green, does not affect use), yellow and blue are the two TTL level (can be directly connected microcontroller ) signal (Note: Measuring Reversible rely on these two levels to distinguish between forward or reverse)
(Let the signal lines A B)
A first pulse, proved to be forward
B prior pulse, proved to be reversed
Important note: a long block or not block did not output as a phase detector, only the rising and falling edges on the radio will have a waveform output, the rotation of the code wheel or switching back and forth when the state will be well-used opaque objects wave output, at high speed, similar to a sine wave or sawtooth, see the following video demonstration. Multimeter test has been performing around 0.1V, it is invalid! Test with a scope or SCM collection mouth