![]() ![]() Two user defined vehicle classifications can be toggled on or off.INTERSECTION DISPLAYScreen views are provided for 4-way intersection configurations. ![]() Count can be collected in either 5 or 15 minute bins. The Hyper and Classic Interfaces are provided as noted above. 2.1 - iPad interface FEATURES:SETTINGSTwo user interfaces are available to count traffic. 2.1 - iPhone and iPod Touch Interface Ver. Visual and audible feedback is provided for each action.YouTube video demonstrations are available at the following links.TurnCount Ver. But, the similarities end there! Classify trucks now with a quick double tap of the on-screen button, count bicycles with a long press of an on-screen button, and count pedestrians by swiping a finger across the street being crossed. This interface is similar to how traditional turning movement counter boards operate. Expensive count boards are no longer needed! Visual and audible feedback is provided for each action.The second interface, the Classic Interface, requires the user to tap a virtual on-screen button for each vehicle movement. Either gesture works! A quick double tap prior to the finger gesture classifies a truck, a slow swipe counts a bicycle, and pedestrians are counted with a swipe of a finger across the street. Follow the direction of the arrows or the vehicle path through the intersection. One interface, the Hyper Interface, brings an approach to counting traffic that will revolutionize the industry! Vehicles are counted by moving a thumb (or any other finger) in the direction of the vehicle movement. The user can count traffic with one of two interfaces. Whether youre a traffic engineer, a transportation planner or just someone wanting to know the number of vehicles and pedestrians entering an intersection, TurnCount is the app for you.TurnCount works similarly to the traditional turning movement counter board. *This indicates the inverse of the signal.Ī similar version of this article appeared in the issue of Electronic Design.TurnCount is the easiest and most intuitive way to count traffic today. Unlike peak detectors that use a capacitor to hold the output voltage, this design includes a digital potentiometer (IC1) that holds the output level indefinitely, without droop. It holds the output level indefinitely, making it useful as a long-term memory. The primary advantage of this circuit is the complete absence of such output droop. Most peak detectors employ a capacitor for holding the output voltage, and the droop (slow change) in V OUT caused by the capacitor's leakage current is particularly noticeable with low frequency or low duty cycle signals. By reducing this V OUT range, the size of an LSB can be decreased, thereby increasing the output resolution. ![]() V OUT ranges between the voltage levels connected to the upper and lower extremes of the digital pot (5V and 0V in this case) in 32 equally spaced increments. When V OUT reaches V IN, the comparator output goes high and latches V OUT at that level. When V I rises above V OUT, the comparator output (IC2) swings low and selects IC1, allowing the wiper position to increment upwards with each high-to-low transition of the clock (INC*). In an alternative approach, shown in the figure below, a 5-bit digital potentiometer with a servo loop is used to create an inexpensive peak detector with a logic-level reset input and no output droop.Ĭomparator control of IC1's chip-select input ensures that the digital potentiometer becomes active only when V IN exceeds the V OUT level currently latched, and R1 ensures that the potentiometer increments upward (rather than downward) as a result. Most peak detectors employ a rectifier and a sample-and-hold circuit, which is prone to output droop.
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