Various diagram: volt

Showing posts with label volt. Show all posts

Monday, November 17, 2014

6 to 12 Volt Power Supply Inverter

This inverter circuit can provide up to 800mA of 12V power from a 6V supply. For example, you could run 12V car accessories in a 6V (British?) car. The circuit is simple, about 75% efficient and quite useful. By changing just a few components, you can also modify it for different voltages.

Part List:

R1, R4 2.2K 1/4W Resistor
R2, R3 4.7K 1/4W Resistor
R5 1K 1/4W Resistor
R6 1.5K 1/4W Resistor
R7 33K 1/4W Resistor
R8 10K 1/4W Resistor
C1,C2 0.1uF Ceramic Disc Capacitor
C3 470uF 25V Electrolytic Capcitor
D1 1N914 Diode
D2 1N4004 Diode
D3 12V 400mW Zener Diode
Q1, Q2, Q4 BC547 NPN Transistor
Q3 BD679 NPN Transistor
L1 See Notes
MISC Heatsink For Q3, Binding Posts (For Input/Output), Wire, Board

Sunday, November 9, 2014

LED Volt Meter Circuit

Here is a Simple LED Volt meter to Monitor the charge level in Lead Acid Battery or Tubular battery. The terminal voltage of the battery is indicated through a four level LED indicators. The nominal terminal voltage of a Lead Acid battery is 13.8 volts and that of a Tubular battery is 14.8 volts when fully charged. The LED voltmeter uses four Zener diodes to light the LEDs at the precise breakdown voltage of the Zener diodes. Usually the Zener diode requires 1.6 volts in excess than its prescribed value to reach the breakdown threshold level. When the battery holds 13.6 volts or more, all the Zener breakdown and all LEDs light up. When the battery is discharged below 10.6 volts, all the LEDs remain dark. So depending on the terminal voltage of the battery, LEDs light up one by one or turns off.

Circuit diagram:

LED Volt Meter Circuit Diagram

Thursday, October 23, 2014

6 to 15 Volt DC Converter

A very efficient 6V to 15V DC to DC converter using LM2585 is publicized at this time. LM2585 is a monolithic integrated voltage converter IC with the intention of can be situated used stylish various applications like flyback converters, boost converters, advance converters, multiple output converters and the rest. The circuit requires lowest possible amount of outdoor components and the IC can source up to 3A output current.

at this juncture the IC is wired for instance a boost converter somewhere resistors R1 and R2 are used to established the output voltage .The junction of R1 and R2 is connected to the comment pin of IC1. Capacitor C4 is the input filter while capacitor C1 the filter on behalf of output. set of contacts comprising of resistor R1 and capacitor C2 is intended for frequency compensation. Inductor L1 provisions the energy for acquiring boost conversion.

6 to 15 Volt DC Converter

Monday, October 20, 2014

Simple Dual Voltage Power Supply 12 Volt

This is the simple circuit diagram of Dual Voltage Power Supply. It is used for Misc… application. This circuit is called regulated power supply. For this reason the main component of this circuit is Regulator IC. It also needs few components to built. The regulator 7812 is the positive voltage regulator and 7912 is the negative voltage regulator.

You can also use 7809 for 9 volt positive power supply and 7909 for negative voltage power supply. It regulates voltage from 24Volt to 12 Volt (DC). The transformer input is 110Volt to 220Volt (AC) and the output must be between 12Volt to 24Volt (AC) and current must be 500mA. In this circuit some capacitors are used as a filter for removing repole.

Sunday, September 7, 2014

5 Volts From a 9 Volt Battery

This is very useful schema.through this schema you can get -5V from 9V battery.The especial thing of this schema is this schema operate with 9V power supply.

Note

# As D1 and D2 use common diode

# build this on a PCB

Thursday, September 4, 2014

15 Volt Stabilizer circuit

In this time I will share about the circuit voltage stablizer or stabilization using IC 7815 and 7915, with a minimum of 17.5V to 50V input. The output of this circuit will issue with the current 15V voltage in accordance with the input. Stabilizer is also equipped with reinforcement by transistor 2N3055 and MJ2955.

15V stabilizer schematic

Part List :

D1 - D4 use 3A diode

C1 - C2 use Capacitor Elco with capacity 4700uF - 10000uF 80V

C3 - C6 use Capacitor Elco with capacity 470uF - 2200uF 50V

Q1 2N3055

Q2 MJ2955

IC 7815 and 7915

Wednesday, September 3, 2014

230 Volt AC To Inverter Switching Wiring diagram Schematic

Description

Before three weeks i am introduced inverter schema diagram but the schema not included ac to inverter switching part so today i introducing a 230 Volt Ac to inverer switching schema diagram .

Circuit showing a inverter switching . Here i have used bc 558 ,BC 548 and a relay for making this schema . 230 volt connected to the base of the transistor Q1.When the power is ON positive volt coming to the base of the transistor so the relay schema is open and load working in 230 V AC .When the power is OFF ground voltage coming to the base of the transistor so the Base of the Q2 is positive there for the relay schema closed and load working in inverter input .Part list and applications are showing below.

Part List

Component No:	Value	Usage
R1	100KΩ	Emitter Load
R2	10K Ω	Base Biasing
R3	180KΩ	Current Limiting
Q1	BC558	Switching
Q2	BC548	Switching
D1	IN4007	Relay Balancing
RL1	12 V	Inverter Switching

Monday, September 1, 2014

230 Volt AC To Inverter Switching Wiring diagram Schematic

Circuit showing a inverter switching . Here i have used bc 558 ,BC 548 and a relay for making this schema . 230 volt connected to the base of the transistor Q1.When the power is ON positive volt coming to the base of the transistor so the relay schema is open and load working in 230 V AC .When the power is OFF ground voltage coming to the base of the transistor so the Base of the Q2 is positive there for the relay schema closed and load working in inverter input .Part list and applications are showing below. Link

Part List

Component No:	Value	Usage
R1	100KΩ	Emitter Load
R2	10K Ω	Base Biasing
R3	180KΩ	Current Limiting
Q1	BC558	Switching
Q2	BC548	Switching
D1	IN4007	Relay Balancing
RL1	12 V	Inverter Switching

Saturday, August 23, 2014

12 Volt to 32 Volt CT converter DC to DC

Kit that can change the normal 12v dc voltage from a car battery, battery bike 12V motor. With the current 7A. so this circuit is very suitable for power car amplifiers and sound systems that use simple 12V battery.

Kit converter is also equipped with inputs "SEND" to activate the circuit and also send this interchangeable inputs is connected to the Tape / cd / dvd player of your car. And input "send" is if the non-connected with an output of "send" player car you then connect it to +12 hrs on v from the battery / batteries The series is already in the test kit and has been functioning normally.

Friday, August 15, 2014

Precision Audio Milli volt meter Circuits Wiring diagram

This electronic schema is audio milivolt meter. It measures 10mV to 50Volt RMS in eight ranges.

Precision Audio Millivoltmeter Circuits Diagram

Precision Audio Millivoltmeter Circuits Diagram

Notes:

Connect J2 and J3 to an Avo-meter set to 50µA range:
Switching SW2 the four input ranges will be multiplied by 5
Total fsd ranges are: 10mV, 50mV, 100mV, 500mV, 1V, 5V, 10V, 50V
Set R11 to read 1V in the 1V range, with a sine wave input of 1V @ 1KHz
Compare the reading with that of another known precision Millivoltmeter or with an oscilloscope.
The oscilloscope reading must be a sinewave of 2.828V peak to peak amplitude
Frequency response is flat in the 20Hz-20KHz range
If you have difficulties in finding resistor values for R1, R2, R3 & R4, you can use the following trick:
R1 = 10M + 1M in parallel
R2 = 1M + 100K in parallel
R3 = 100K + 10K in parallel
R4 = 1K2 + 6K8 in parallel
All resistors 1/4W 1% tolerance

Parts:

R1_____909K    1/2W 1% Metal Oxide Resistor

R2______90K9   1/2W 1% Metal Oxide Resistor

R3_______9K09  1/2W 1% Metal Oxide Resistor

R4_______1K01  1/2W 1% Metal Oxide Resistor

R5_____100K    1/4W Resistor

R6_______2M2   1/4W Resistor

R7______82K    1/4W Resistor

R8______12K    1/4W Resistor

R9_______1K2   1/4W Resistor

R10______3K3   1/4W Resistor

R11____200R    1/2W Trimmer Cermet

C1_____330nF   63V Polyester Capacitor

C2,C3__100µF   25V Electrolytic Capacitor

C4_____220µF   25V Electrolytic Capacitor

C5______33pF   63V Polystyrene Capacitor

C6_______2µ2   63V Electrolytic Capacitor

D1-D4___1N4148 75V 150mA Diodes

IC1_____CA3140 Op-amp

IC2_____CA3130 Op-amp

SW1_____2 poles 5 ways rotary switch

SW2_____SPDT switch

J1______RCA audio input socket

J2,J3___4mm. output sockets

B1______9V PP3 Battery

Clip for PP3 Battery

Friday, August 8, 2014

Simple 10 Amp 13 8 Volt Power Supply Wiring diagram Schematic

Simple 10 Amp 13.8 Volt Power Supply Circuit Diagram. Sometimes amateurs like to home-brew their power supplies instead of purchasing one off the shelf at any of the major ham radio retail dealers. The advantage to rolling your own power supply is that it teaches us how they work and makes it easier to troubleshoot and repair other power supply units in the shack. It should be noted that there is no real cost advantage to building your own power supply unless you can get a large power transformer and heat sink for a super low price.

Of course rolling our own gives us the ability to customize the schema and make it even more reliable than commercial units. The schema in Figure 1 will give us 10 amps (12 amps surge) with performance that equals or exceeds any commercial unit. The schema even has a current limiting feature which is a more reliable system than most commercial units have. Just like other commercial units, this schema uses the LM723 IC which gives us excellent voltage regulation. The schema uses 3 pass transistors which must be heat sinked. Resistor R9 allows the fine tuning of the voltage to exactly 13.8 volts and the resistor network formed by resistors R4 through R7 controls the current limiting.

The LM723 limits the current when the voltage drop across R5 approaches .7 volts. To reduce costs, most commercial units rely on the HFE of the pass transistors to determine the current limiting. The fault in that system is that the HFE of the pass transistors actually increases when the transistors heat up and risks a thermal runaway condition causing a possible failure of the pass transistors. Because this schema samples the collector current of the pass transistors, thermal runaway is not a problem in this schema making it a much more reliable power supply.

The only adjustment required is setting R9 to the desired output voltage of anywhere between 10 and 14 volts. You may use a front panel mounted 1K potentiometer for this purpose if desired. Resistor R1 only enhances temperature stability and can be eliminated if desired by connecting pins 5 and 6 of IC-1 together. Although it really isn’t needed due to the type of current limiting schema used, over voltage protection can be added to the schema by connecting the schema of Figure 2 to Vout. The only way over voltage could occur is if transistors Q2 or Q3 were to fail with a collector to emitter short. Although collector to emitter shorts do happen, it is more much more likely that the transistors will open up when they fail.

10 Amp 13.8 Volt Power Supply Circuit Diagram

I actually tested this and purposely destroyed several 2N3055’s by shorting the emitters to ground. In all cases the transistors opened up and no collector to emitter short occurred in any transistor. In any event, the optional schema in Figure 2 will give you that extra peace of mind when a very expensive radio is used with the power supply. The schema in Figure 2 senses when the voltage exceeds 15 volts and causes the zener diode to conduct. When the zener diode conducts, the gate of the SCR is turned on and causes the SCR to short which blows the 15 amp fuse and shuts off the output voltage.

A 2N6399 (Tech America) was used for the SCR in the prototype but any suitable SCR can be used. While over voltage protection is a good idea, it should not be considered a substitute for large heat sinks. I personally feel the best protection from over voltage is the use of large heat sinks and a reliable current limiting schema. Be sure to use large heat sinks along with heat sink grease for the 2N3055 transistors. I have used this power supply in my shack for several months on all kinds of transceivers from HF, VHF to UHF with excellent results and absolutely no hum. This power supply will be a welcome addition to your shack and will greatly enhance your knowledge of power supplies.

10 Amp 13.8 Volt Power Supply Circuit Diagram2

Parts
R1 1.5K ¼ Watt Resistor (optional, tie pins 6 & 5 of IC1 together if not used.)
R2,R3 0.1 Ohm 10 Watt Resistor (Tech America 900-1002)
R4 270 Ohm ¼ Watt Resistor
R5 680 Ohm ¼ Watt Resistor
R6,R7 0.15 Ohm 10 Watt Resistor (Tech America 900-1006)
R8 2.7K ¼ Watt Resistor
R9 1K Trimmer Potentiometer (RS271-280)
R10 3.3K ¼ Watt Resistor
C1,C2,C3,C4 4700 Microfarad Electrolytic Capacitor 35 Volt (observe polarity)
C5 100 Picofarad Ceramic Disk Capacitor
C6 1000 Microfarad Electrolytic Capacitor 25 Volt (observe polarity)
IC1 LM723 (RS276-1740) Voltage Regulator IC. Socket is recommended.
Q1 TIP3055T (RS276-2020) NPN Transistor (TO-220 Heat Sink Required)
Q2,Q3 2N3055 (RS276-2041) NPN Transistor (Large TO-3 Heat Sink Required)
S1 Any SPST Toggle Switch
F1 3 Amp Fast Blow Fuse
D1-D4 Full Wave Bridge Rectifier (RS276-1185)
T1 18 Volt, 10 Amp Transformer Hammond #165S18 (Tech America 900-5825)