SEM JUNE 2017 LOGIC SYSTEM LAB ELEC1202/BEE110 21 MINI PROJECT Simple Light Part

Question

SEM JUNE 2017 LOGIC SYSTEM LAB ELEC1202/BEE110 21 MINI PROJECT Simple Light Part Lists R1 VR1 R3, R4 ICs IC1 IC2 IC3 (N1 ,N2) 1C4 2- IC 7400-NANDGatee DIODES D1 D16 00K p Timer 5551C P 1 to 10 Decoder 7493 IC -1to16 decoder 7441 IC7 LEDs20 n1Y Capacitor 5 25 V , 2 C1 C2 apacitor 0.01 BATT Battery 5 Volt GP 2 b Circuit Description: The circuit consists of three parts. The first part has an oscillator while the second has mod 16 counter 7493 The oscillator is wired in self-triggered mode, and the potentiometer VR1 is used for speed control of the running lights. That is, frequency can be varied from 21 Hz to less than 1 Hz. The counter outputs A, B and C are decoded by IC3 (the decoder 7442) and the outputs obtained on pins 1 to 9 of this IC. The D output of the counter is used for selecting the LEDs from D1 to D8 or D9 to D16. Whenpfwp1 to D8 are selected, and when D is high D9 to D16 are selected For the selection of these LEDs, IC4 (7400) NAND gate is used. Thus, a sequential running effect is produced.

Explanation / Answer

when you switch on the battery the LED initially travel in the one way and then travel in reverse direction. It means, the pattern is same as a pendulum as it travels back and forth. thats why its called as sequential running effect.

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.