150 Watt amplifier circuit

150 Watt amplifier circuit

 

Description

This is the cheapest 150 Watt amplifier circuit you can get,I think.Based on two Darlington power transistors TIP 142 and TIP 147 ,this circuit can deliver a blasting 150 W Rms to a 4 Ohm speaker.Enough for you to get rocked?,then try out this.

TIP 147 and 142 are complementary Darlington pair transistors which can handle 5 A current and 100V ,famous for their ruggedness. Here two BC 558 transistorsQ5 and Q6 are wired as pre amplifier and TIP 142 ,TIP 147 together with TIP42  (Q1,Q2,Q3)  for driving the transistors.This circuit is designed so rugged that this can be assembled even on a common board or even by pin to pin soldering.The circuit can be powered from a +/-45V 5A  dual power supply.You must try this circuit.Its working great.

Circuit Diagram & Parts List .

Notes.

• Remember TIP 142 and 147 are Darlington pairs  .They are shown as conventional transistors in figure for ease.So don’t get confused.Even though each of them have 2 transistors ,2 resistors and 1 diode inside ,only three pins ,base emitter and collector are coming out.Rest are connected internally.So its quite OK to assume each of them as transistor for ease.
• Use a well regulated and filtered power supply.
• Connect a 10K POT in series with the input as volume control if you need.Not shown in circuit diagram.

TIP 142 & 147 Internal diagram and pin out.

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Remote controlled appliance switch circuit

Remote controlled appliance switch circuit

 

Description.

Here is a versatile remote controlled appliance switch that can ON or OFF any appliance connected to it using a TV remote.

 

IR remote sensor IC TSOP 1738 is used for recieving the signal. Normally when no signal is falling on IC3 the output of it will be high.This makes Q1 OFF.When a signal of 38 KHz from the TV remote falls on the IC3 its output goes low.This makes Q1 conduct and a negative pulse is obtained at pin 2 of IC 1  NE 555.Due to this IC1 wired as a monostable multivibrator produces a 4 Sec  long high signal at its out put.This high out put is the clock for IC 2 which is wired as a Flipflop and of , its two outputs pin 3 goes low and pin 2 goes high.The high output at pin 2 is amplified to drive the relay .For the next signal  the outputs of IC2 toggles state. Result, we get a relay toggling on each press on the remote.Any appliance connected to this circuit can be switched ON or OFF.

Circuit Diagram with Parts List .

Notes.

• Before wiring the circuit make sure that the carrier frequency  of the TV remote you have is 38 KHz.For that wire the sensor part only ,point your remote to the TSOP1738 and press any switch.If  out put of TSOP1738  goes  low them ok, your remote is of 38Khz type.Nothing to worry almost all TV remote are of this type.
• You can use any switch because for any switch the code only changes,the carrier frequency remains same.We need this carrier frequency only.
• Assemble the circuit on a good quality PCB or common board.
• The appliance can be connected through NO or NC  and contacts of the relay .

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Object Counter

Object Counter

Object Counter

Project Object Counter Block Diagram        The project presented here is based on world’s most powerful microco-ntroller based on intel’s mcs-51 family , generally known as intel-8051. We have used its derivative atmel-89c2051. Operation:  A pair of 38khz transmitter and a receive is used to count the objects. Call IndinEngineer’s To Book This Project  Counts pulses are out from the 38khd receiver which are coupled to an opto coupler.  At pin 2 out put of the optocoupler is connected to microcontroller pin 8 p3.4. Ic3 an optocoupler will receive incoming count pulse at pin3 and output from pin 5 is connected to p3.4 pinof the ic2 microcontroller, Two line by 16 character on each line (2×16) is used in nibble mode and maximun count can reach upto 65536 there after it will reset to 00000. SW1 is manual reset switch to make the counter to reset to zero.  Circuit is driven by 9v 500m.a.  transformer connected to PCON1 Diode D1-D4 forms bridge  circuit C1,c2 and c3 are filter capacitors and are part of power supply section.. Ic1 7805 is 5v regulator ic to give stablised supply to microcontroller. Ld1 is a  power indication led. R1 controls the current flowing thrugh led LD1 Crystal X1  along with C5 and C6  gives the necessary clock to microcontroller. Capacitor C4 and R2 gives the required reset pulse to microcontroller.   Construction: solder all the parts provided in the kit properly. First connect the jumper wires(links) before you solder the ic sockets. Donot solder integrated circuits directly on the circuit board , it may damage the ic since you my not be experianced soldering person. So solder the ic sockets first on the circuit board. Solder smaller components first like resistance and disk capacitors, assemble the complete kit one by one. Please make sure that there are no  short circuits left on to the circuit board. Connect the main supply wire with 230v ac pins at one end ,to the 9v transformer towards primary side to the other open end. . Primary side will have high resistance when checked with multimeter. Connect 2pin plug to the secondary side of the transformer(low resistance side)  plug the wire to main and check the ac voltage at the plug connected to the secondary of the transformer. It should be 9v ac. Now connect the plug   to the socket connected on to the circuit board. Power supply led ld1 will glow. Check the voltage at the output of the regulator. It should be perfactly 5v dc. Check the voltage at the power supply pins of all the sockets mounted on circuit board it should be 5v dc.

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MICROCONTROLLER BASED PROJECTS(89C51) ieee,EMBEDDED

1. WIRELESS MESSAGING VIA MOBILE/LANDLINE
2. GSM BASE HOME SECUIRTY SYSTEM
3. GSM BASED HOMEAUTOMATION & SECUIRTY
4. AUTOMATIC TOLL TAX
5. VOTING MACHINE
6. SMS BASE DEVICE SWITCH
7. SOLAR TARKER SYSTEM
8. TEXT DATA COMMUNICATION THROUGH FIBER/LAGER
9. DIGITAL COMBINETION LOCK
10. SAFETY GUARD FOR THE BLIND (PROXIMITY BASE
11. SMS THROUGH TELEPHONE
12. SPEED CHECKER FOR HIGHWAYS
13. SMART CARD
14. DATA SECUIRTY SYSTEM
15. TOUCH SCREEN
16. HEART BEAT MONITOR
17. AUTOMATIC ROOM LIGHT CONTROLLER:
18. RADAR SYSTEM ILIGAL AROPLAN DETECTOR
19. PRI-PAID CAR PARKING
20. MULI LAVEL CAR PARKING
21. FASTEST-FINGER-FIRST USING 89C51
22. MICRO PROCESSOR BASED REVERSIBLE D.C. MOTOR CONTROL
23. STEPPER MOTOR CONTROL USING 89C51
24. MIC-89C51 MONITORING SYSTEM
25. MANUAL AT 89C51 PROGRAM
26. AT 89C2051 BASED COUNTDOWN TIMER
27. MICROCONTROLLER BASED CODE LOCK USING AT 89C2051
28. LCD FREQUENCY METER USING 89C2051
29. CALLER ID UNIT USING MICRO-CONTROLLER
30. MICROPROCESSOR-BASED HOME SECURITY SYSTEM
31. STEPPER MOTOR CONTROL USING 89C51 MICRO-CONTROLLER
32. MICRO CONTROLLER BASED TEMPERATURE METER
33. MICRO CONTROLLER BASED HEARTBEAT MONITOR
34. ULTRASONICRANGEFINDER USING PIC MICRO CONTROLLER
35. CALLER- ID UNIT USING MICRO CONTROLLER
36. MICRO CONTROLLER BASED PATHFINDER
37. MICRO CONTROLLER BASED ROBOT.
38. MICRO CONTROLLER MOVING MESSAGE DISPLAY
39. MICRO CONTROLLER BASED RELAY SWITCHING
40. MICRO CONTROLLER AUTO DIALER USING GSM.
41. MICRO CONTROLLER BASED WATER LEVER INDICATOR
42. MICRO CONTROLLER BASED WIRELESS HOME AUTOMATION
43. MICROCONTROLLER BASED RADAR SYSTEM
44. MULTI CHANNEL INFRA RED CONTROL 4 different point 89c2051 micro controller in transmitter and receiver, using infra red technique.
45. MOVING MESSAGE DISPLAY : 89c51 micro controller Led matrix,
46. Digital clock with alarm: using 89c51 micro controller
47. TRAFFIC LIGHT WITH DOWN COUNTER : all the four sides of the road with one side counter display using 89c51 micro controller circuit.
48. ULTRASONIC DISTANCE METER USING MICROCONTROLLER
49. PRI-PAID CAR PARKING SYSTEM
50. MICRO CONTROLLER TEMPERATUIRE METER
51. ANOLOG TO DIGITAL CONERTER USING AT89C51 MCU
52. INFARED REMOTE CONTROLE SYSTEM
53. ULTRASONIC MOVEMENT DETECTOR
54. MICROCONTROLLER BASED TACHOMETER
55. MCU BASED VISITOR COUNTER
56. PWM CONTROL OF DC MOTOR USING 89C51
57. AN INTELLIGENT AMBULANCE CAR WHICH CONTROL TO TRAFFIC LIGHT
58. PRE-PAID ENERGY METER
59. MICROC CONTROLLER BASED LINE FOLLOWER OR TRACING ROBOT
60. AUTOMATED WALKING ROBOT CONTROLLED BY MCU
61. AUTO BRAKING SYSTEM
62. AUTOMATIC RAILWAY CROSSING GATE CONTROLLER

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A complete prepaid electricity system just like the cellular mobile service you use exactly how much u      pay  plus you can recharge any time

1. MICROCONTROLLER AT-89C51 BASED VOTING(latest)
   ASM
   MACHINE: The voting system for four candidates with memory
   backup to restore the results to be viewed with password

1. MICROCONTROLLER AT-89C51 BASED INDUSTRIAL (latest)
   FAULT MONITORING SYSTEM: It will check the faults like ASMover temperature, humidity, power failur e, over voltage etc. at the
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   wireless link.
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   LIMITER/GOVERNER WITH AUTO BREAKING(latest): The
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   limits the speed as Speed Governor. One can change the speed with
   variable control

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