Digital Timer With Photogate Pair
Item Code : SJ162
It is based on microcontroller having crystal controlled time base to accurately measure the time intervals, speed and acceleration in various modes. It has built-in test function for the photogates. Least count time resolution is 0.1millisecond. It can also calculate acceleration due to gravity ‘g’. Instrument is self contained that requires no computer. USB port is provided for connecting to the computer. The system has in-bult storage for 99 experiment readings through several modes. It can be used with Air track and trolley to comprehensively study several experiments on kinematics and dynamics. Working Voltage 9V DC adaptor.
1) TIME MODES
a) Using single gate
b) Using two gates
c) Stop-watch – measures time between pressing start/stop button. Time measurement upto 99 Seconds.
d) Pendulum – measures pendulum period.
e) Fence – measures 10 time values
2) SPEED MODES
a) One gate – Instantaneous
b) Two gates – Average
c) Collision – I, Initial & final speeds of the cart
d) Collision – II, Initial & final speeds of two carts
e) Pulley – Lin – Linear speed of cart using pulley
f) Pulley – Rad – Angular speed in radians/second
G) Pulley – Rev – Angular speed in revolutions/second
3) ACCELERATION MODES
a) One gate – Instantaneous
b) Two gates – Average, Initial & Final
c) Pulley – Lin – Acceleration with pulley
d) Pulley – Ang – Angular acceleration
e) g – Free fall
PHOTOGATE
Photogate is narrow-beam infrared radiation detector connected directly to timer and used to provide the timing signals. The LED in one arm of the photogate emit a narrow infrared beam. It is used for making time measurement with timer when used with dynamic trolley, air track and g by free fall apparatus. It can be clamped on a boss head.
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