99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan
The circuit uses easily available components. The 1C 4033used in the circuit has a built- in decade counter and 7-segment decoder and driver, making the circuit compact and easy to assemble, due to low component count. The clock signal of 100 Hz, to drive the counters, is obtained from IC 4060 (IC5)...
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2004
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my.uitm.ir.508972021-09-28T03:38:28Z https://ir.uitm.edu.my/id/eprint/50897/ 99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan Che Pa, Mohammad Norpaizal Mat Hassan, Nor Azila TK Electrical engineering. Electronics. Nuclear engineering Electronics Apparatus and materials Semiconductors Detectors. Sensors. Sensor networks Transmission lines Microelectromechanical systems Applications of electronics Photoelectronic devices (General) The circuit uses easily available components. The 1C 4033used in the circuit has a built- in decade counter and 7-segment decoder and driver, making the circuit compact and easy to assemble, due to low component count. The clock signal of 100 Hz, to drive the counters, is obtained from IC 4060 (IC5). Start/stop executed by a simple flip-flop constructed around IC 4001 (IC6), having quad NOR gates. When start switch (S2) is momentarily pressed, two things happen. One, the counters are reset to zero and second, the counters are enabled to accept the clock signals. The output of gate G2 goes low; enabling clock signals from IC5 to be accepted by counters IC1 to IC4. Simultaneously, output of gate G1 goes high and capacitor C2 starts charging through resistor R32. During this period this period, pin 8 of gateG3 is low and pin 9 is also low due to high input of gate G4. Hence, the output of G3 is high, resetting IC1 to IC4. After a while, when capacitor C2 has fully charged and pin 8 of gate G3 goes high, the output of G3 swings low, enabling the counter to start counting from 0.00 onwards. When the stop switch is pressed momentarily the output of gate G2 goes high, disabling the counters to accept the clock pulses. Simultaneously, output of G1 goes low, and capacitor C2 discharges. But as output of G3 continues to remain low, the display is frozen until the start switch is pressed again. 2004-02-09 Student Project NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/50897/1/50897.PDF ID50897 Che Pa, Mohammad Norpaizal and Mat Hassan, Nor Azila (2004) 99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan. [Student Project] (Unpublished) |
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TK Electrical engineering. Electronics. Nuclear engineering Electronics Apparatus and materials Semiconductors Detectors. Sensors. Sensor networks Transmission lines Microelectromechanical systems Applications of electronics Photoelectronic devices (General) |
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TK Electrical engineering. Electronics. Nuclear engineering Electronics Apparatus and materials Semiconductors Detectors. Sensors. Sensor networks Transmission lines Microelectromechanical systems Applications of electronics Photoelectronic devices (General) Che Pa, Mohammad Norpaizal Mat Hassan, Nor Azila 99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan |
| description |
The circuit uses easily available components. The 1C 4033used in the circuit has a built- in decade counter and 7-segment decoder and driver, making the circuit compact and easy to assemble, due to low component count. The clock signal of 100 Hz, to drive the counters, is obtained from IC 4060 (IC5).
Start/stop executed by a simple flip-flop constructed around IC 4001 (IC6), having quad NOR gates. When start switch (S2) is momentarily pressed, two things happen. One, the counters are reset to zero and second, the counters are enabled to accept the clock signals.
The output of gate G2 goes low; enabling clock signals from IC5 to be accepted by counters IC1 to IC4. Simultaneously, output of gate G1 goes high and capacitor C2 starts charging through resistor R32. During this period this period, pin 8 of gateG3 is low and pin 9 is also low due to high input of gate G4. Hence, the output of G3 is high, resetting IC1 to IC4. After a while, when capacitor C2 has fully charged and pin 8 of gate G3 goes high, the output of G3 swings low, enabling the counter to start counting from 0.00 onwards.
When the stop switch is pressed momentarily the output of gate G2 goes high, disabling the counters to accept the clock pulses. Simultaneously, output of G1 goes low, and capacitor C2 discharges. But as output of G3 continues to remain low, the display is frozen until the start switch is pressed again. |
| format |
Student Project |
| author |
Che Pa, Mohammad Norpaizal Mat Hassan, Nor Azila |
| author_facet |
Che Pa, Mohammad Norpaizal Mat Hassan, Nor Azila |
| author_sort |
Che Pa, Mohammad Norpaizal |
| title |
99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan |
| title_short |
99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan |
| title_full |
99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan |
| title_fullStr |
99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan |
| title_full_unstemmed |
99.99 second stop-clock / Mohammad Norpaizal Che Pa and Nor Azila Mat Hassan |
| title_sort |
99.99 second stop-clock / mohammad norpaizal che pa and nor azila mat hassan |
| publishDate |
2004 |
| url |
https://ir.uitm.edu.my/id/eprint/50897/1/50897.PDF https://ir.uitm.edu.my/id/eprint/50897/ |
| _version_ |
1712288429189890048 |
| score |
13.211869 |