Lab Projects List

List of Proposed Lab Projects
	(Communication System Lab)
6th Semester (Electrical + Electronics)		By: Engr. Hazoor Ahmad
Sr	Project Title	Description
1	REACTION TIMER GAME	This is a game for two players. Player 1 presses the START button. This resets the 4026 counter chip and starts the 555 oscillator. The 555 produces 10 pulses per second and these are counted by the 4026 chip and displayed on the 7-Segment display. The second player is required to press the STOP button. This freezes the display by activating the Clock Inhibit line of the 4026 (pin 2).
2	POLICE SIREN	circuit uses two 555's to produce an up-down wailing sound.
3	3x3x3 LED Cube
4	Simple Amplifier
5	Bike Turning Signal	This circuit can be used to indicate left and right turn on a motor-bike. Two identical circuits will be needed, one for left and one for right.
6	CONTINUITY TESTER	This circuit will detect low resistances and high resistances to produce a tone from the speaker. It will detect up to 200k and the circuit automatically turns off when the probes are not used.
7	DARKNESS DETECTOR	When the level of light on the photo-cell decreases, the Alarm is activated
8	LED DICE GAME	This circuit produces a random number from 1 to 6 on LEDs that are similar to the pips on the side of a dice.
9	LED Light Controller	This circuit will adjust the brightness of one or more LEDs from 5% to 95%.
10	LIGHT DETECTOR
11	MACHINE GUN SOUND Generator	This circuit produces a sound very similar to a machine gun
12	Metal Detector Circuit	When a magnet is brought close to the 10mH choke, the output frequency changes.
13	Metronome Circuit	A Metronome is a device used in the music industry to indicate the rhythm by a 'toc-toc' sound.
14	Digital Counter	A circuit that counts from 0 to 99 by pressing a pushbutton.
15	MOTOR Speed Control using PWM	The speed of a motor can be adjusted by this circuit, from 5% to 95%.
16	MUSIC BOX	This circuit produces 10 different tones and by selecting suitable values to change the voltage on pin 5, the result can be quite pleasing. Note: the two unused outputs of the 4017 produce a tone equal to that produced by the 555 when pin 5 has no external control voltage.
17	POLICE LIGHTS	This circuit flashes the left LEDs 3 times then the right LEDs 3 times, then repeats.
18	RAIN ALARM	This circuit consumes no current until moisture is detected on the rain plate.
19	ROULETTE Circuit	This circuit creates a rotating LED that starts very fast when a finger touches the TOUCH WIRES. When the finger is removed, the rotation slows down and finally stops.
20	SCREAMER Circuit	This circuit will produce an ear-piercing scream, depending on the amount of light being detected by the Light Dependent Resistor.
21	High Voltage Generator	This circuit produces a very high voltage and care must be used to prevent getting a nasty shock.  The transformer can produce over 1,000v and the 8-stage multiplier can produce up to 20,000v
22	TRAFFIC LIGHTS Circuit	Here's a clever circuit using two 555's to produce a set of traffic lights for a model layout.
23	TRANSISTOR TESTER
24	WAILING SIREN	By pressing the button, the wailing sound increases. Releasing the button decreases the wailing. The circuit automatically turns off after about 30 seconds.
25	ZENER DIODE TESTER	This circuit will test zener diodes up to 56v. See Talking Electronics website, left index, 200 Transistor Circuits (circuits 1-100) and go to Zener Diode (making) to see how to make a zener diode and how to create a zener voltage from a combination of zeners.
26	VOLTAGE DOUBLER	A voltage higher than the supply can be created by a "Charge-Pump" circuit created with a 555, diodes and capacitors as shown in the following circuit. The output will deliver about 50mA
27	Binary Adder	4 bit binary adder circuit
28	Free Running Counter	counter that counts from 0 to 9
29	Visitor Counter	A small scale visitor counter circuit that displays the number of visitors coming into a place.
30	Digital Thermometer	A digital temperature detector circuit.