Sunday, August 14, 2011
220 VOLT DISCO LAMP CIRCUIT SCHEMATIC DIAGRAM
220 VOLT DISCO LAMP CIRCUIT SCHEMATIC DIAGRAM
You can use either moving coil microphone or condenser microphone for this circuit. Make sure the electrolytic capacitor is rated for 16 volt or more. The potentiometer shown in the schematic diagram is used to adjust the gain of the pre-amplification. You can adjust this potentiometer to get a proper sound level where the relay would be activated.
List Componet Of Disco Lamp circuit
R1 : 22k 1/4 watt resistor
R2 : 4K7 watt resistor
R3 : 2K2 watt resistor
R4,R8 : 10K watt resistor
R5 : 33K watt resistor
R6 : 56K watt resistor
R7 : 1M watt resistor
Potensio: 50K
C1 : 470uf/35V electrolytic capacitor
C2 : 22n ceramic capacitor
C3 : 100n ceramic capacitor
C4 : 1Uf/50V electrolyticcapacitor
D1 - D5 : 1N4007
D6 : Zener 5.1v
D7 : 1N4148
IC : CD 4069
SCR : FIR 3D
Mic : Mic Condensor ider I used.
Saturday, August 13, 2011
100W INVERTER CIRCUIT BY IRF44 MOSFET SCHEMATIC DIAGRAM
100W INVERTER CIRCUIT BY IRF44 MOSFET SCHEMATIC DIAGRAM
It is recommended to Have a “Fuse” in the Power Line and to always have a “Load connected”, while power is being applied. The Fuse should be10 Amps per 100 watts of output. The Power leads must be heavy enough wire to handle this High Current Draw.
16-LED/46-LED CIRCUIT COMBINATION SCHEMATIC DIAGRAM
16-LED/46-LED CIRCUIT COMBINATION SCHEMATIC DIAGRAM
Aseries combination of 16 LEDs Gives a luminance (lux) equivalent of a 12W bulb. But if you have two series combinations of 23 LEDs in parallel (Total 46 LEDs), it Gives equal to a 35W light bulb.
Diode D1 (1N4007) and capacitor C1 act as rectifying and smoothing elements to Provide DC voltages to the row of LEDs. For a 16-LED row, use Cx of 12:22 µF, 630V; C1 of 22 µF, 100V; and zener of 48V, 1W. Similarly, for 46 LEDs combination use Cx of 0:47 mF, 630V; C1 of 33 µF, 150V; and zener of 69V, 1W. This circuit (inclusive of LEDs) costs Rs 200 to Rs 400.
35W AUDIO AMPLIFIER CIRCUIT BY STK082 SCHEMATIC DIAGRAM
35W AUDIO AMPLIFIER CIRCUIT BY STK082 SCHEMATIC DIAGRAM
This amplifier circuit is suitable for home power audio devices. The STK082 amplifier specifications might lead you to believe that it can use supply voltages of up to ±43V. but I don't recommend anything greater than ±25V if 8 ohm loads are expected, although ±30V will be fine if you can provide good heatsinking.
Friday, August 12, 2011
Mini Auto Charger Fan Circuit
This circuit is called the auto circuit which can use any electronic device to operate it automatically. To make this circuit the cost is very low. Any interested student can make it very easily. The main component of this circuit is transistor. Its operation is very easy.
The main purpose of this is to operate a charger fan where need 6volt battery. This circuit is mainly needed when the main power is OFF. That is called load shedding. Because at the time of load shedding , 6volt battery operate the fan automatically. You don’t have need to ON the switch of the fan or OFF the fan switch. Only relay work this as a switch. The charging system is also automatically. On the other big matter is that no over charge is occurred of the battery. So the life time of the battery is increased.
Component:
1. Transistor ( npn ) – 2N2222, BC547
2. Zener Diode - 6.8V
3. Diode
4. Relay - 6V
5. Resistor – 1K, 100Ω
6. Rechargeable Battery - 6V
7. Fan - 6V
8. Power supply - 6V
Operation:
This circuit is three section, input section and output section. 2N2222 transistor is used to control relay. BC547 transistor is used to control output section using relay. Zener diode and a diode connect with BC547 transistor base as a series connection. Zener diode always controls battery charge. It zener voltage is 6.8V which can’t overcome battery voltage.
When power supply voltage is applied to the 2N2222 transistor base the transistor is on. So the relay is ON relatively the output circuit is OFF. Inverse will occurs when power supply voltage is OFF. When 2N2222 transistor is ON then relay active only battery charging, relay deactivate the fan. Zener diode always keeps battery voltage full (6volt).
Advantages:
1. Need not switch ON/OFF.
2. It depends on AC power supply come or gone.
3. This circuit is used when you are sleeping.
4. Easy to make
5. Cost is very low
6. Components are few.
7. Battery can’t over charge.
8. Overall efficiency is 78%.
9. Not you, only relay can do your work.
10. The circuit is a small project for all students.
Sunday, August 7, 2011
30W MINI MOSFET AMPLIFIER CIRCUIT SCHEMATIC DIAGRAM
30W MINI MOSFET AMPLIFIER CIRCUIT SCHEMATIC DIAGRAM
To obtain such a performance and to ensure overall stability of this very simple circuitry, a suitable regulated dc power supply is mandatory. This is not a snag because it also helps in keeping noise and hum of the preamp to very low levels and guarantees a predictable output power into different load impedances. Finally, as the amplifier requires only a single rail supply, a very good dc voltage regulator capable of supplying more than 2 Ampare/40V can be implemented with a few parts also.
25V CAPACITOR BANK FOR OCL AMPLIFIER CIRCUIT DIAGRAM
25V CAPACITOR BANK FOR OCL AMPLIFIER CIRCUIT DIAGRAM
Although shown with 4,700uF filter capacitors, larger ones may be used. Anything beyond 10,000uF is too expensive, and will not improve performance to any worthwhile degree. Probably the best is to use two 4,700uF caps per side (four in all). This will actually work better than a single 10,000uF device, and will be cheaper as well.
It is essential that fuses are used for the power supply. While they will not stop the amp from failing (no fuse ever does), they will prevent catastrophic damage that would result from not protecting the circuit from over-current conditions.
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