Wiring Schematic diagram: dc

Showing posts with label dc. Show all posts

Wednesday, November 19, 2014

Power Supply DC variable

This circuit is called a Power Supply DC variable is one of the best advantageous apparatus in the cyberbanking hobbyist’s work. This ambit is not an complete novelty, but a simple, reliable, “rugged” and short-proof, with a capricious voltage up to 24V and capricious so that it is up to 2A.

Capacitor C1 can be 2200 to 6800?F, 35 to 50V. For Q4 charge be army on heatsinks to accumulate a acceptable breeze of acceptable output. For the 2N3055 transistor (Q4) can be replaced with a hardly beneath able TIP3055 type.

Componen used:
P1 = 500R Linear Potentiometer
P2 = 10K Log. Potentiometer
R1, R2 = 2K2 1/2W
R3 = 330R 1/4W
R4 = 150R 1/4W
R5 = 1R 5W
C1 = 3300?F 35V
C2 = 1?F 63V
D1, D2 = 1N5402 3A
D3 = 5mm. Red LED
Q1 = BC182
Q2 = BD139
Q3 = BC212
Q4 = 2N3055
T1 = 220V Primary, 36V Center-tapped Secondary

Tuesday, November 18, 2014

DC motor driver with H Bridge IC L293D

IC H Bridge DC motor driver L298 has two H-Bridge circuit in it, so it can be used to download the drive two DC motors. H Bridge DC motor driver L298 each can deliver currents up to 2A. However, in use, the H Bridge DC motor driver L298 can be used in parallel, so the ability to deliver the H Bridge DC motor driver L298 flow into 4A. The consequences of the installation of H Bridge L298 DC motor driver with the parallel mode, you need 2 pieces Bridge H L298 DC motor driver to control two DC motors using H bridge DC motor driver L298 in parallel mode.

H Bridge Pin IC L298 DC motor driver which is connected in parallel operation mode:
* OUT1 connected to OUT4.
* OUT2 OUT3 linked.
* IN1 is connected to IN4.
* IN2 connected to IN3.
* ENABLE ENABLE A linked to B.

OUT1/OUT4 and OUT2/OUT3 associated with DC motors to be controlled.

Please note that the output of the L298 does not have a safety diode. Thus, the need to add two diodes - flyback diodes, with appropriate current capability, at any point output.

Thursday, November 13, 2014

3000 watt power inverter 12V DC to 230V AC

Circuit Diagram | 3000 watt power inverter 12V DC to 230V AC

Circuit Diagram of 3000 watt power inverter 12V DC to 230V AC

Fig. 2: Sine-wave voltage and conventional square wave voltage with both 230 Volt rms

Fig. 3: Square wave voltage with duty cycle 25% for 230 Volt rms ("modified sine")

PCB Layout:3000 watt power inverter

Component Placement: 3000 watt power inverter

fig.: output voltage with no load or inductive load.

fig.: resistor 0,001 Ohm made of high-grade steel sheet metal

Control electronics |12V DC to 230V AC

fig.: control electronics on strip hole plate (previous version) and PCB of the "professional edition"

Assembly of the mosfet-transistors on the heat sink | 3000 watt power inverter

fig.: heat sink, mosfet transistors, connections.

Final assembly | 3000 watt power inverter 12V DC to 230V AC

fig.: 1500 VA inverter with 2 parallel transformers and 1000 VA inverter

Source:http://www.qsl.net

TDA7275A bassed DC motor speed controller project with explanation

Using the TDA7275A linear integrated circuit designed in a minidip plastic package can be designed a very simple speed regulator electronic project that can be used for speed regulation of small DC motors .

TDA7275A DC speed controller project is intended for use as speed regulator for DC motors of record players, tape and cassette recorders.
This DC motor speed controller circuit project can provide a maximum output current of 1.5 amperes .

Supply voltage range that is accepted for this DC motor speed regulator project is between 8 and 18 volts . V2 is typically 1.5 volt for Motor ”Run” (Acc. Following data or open) and 1 volt for Motor ”Stop” (Acc. Following data or grounded) .

Wednesday, October 22, 2014

DC fan control circuit for power amplifier

DC fan control circuit for power amplifier .Variable speed DC fan This series of works based on the input signal. Speed / fan rotation depending on size of the input signal coming from speaker lines. If there is no signal then the fan will spin slowly according to the setting VR1. Input supply can be taken directly from the main transformer power amplifier, 12V CT 12V, so no need to increase the transformer again.

Circuit Schematic Electronics | CSE

This circuit has been tested and do not cause buzzing. correction: the lowest R: 560 ohm

Wednesday, September 3, 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.

Tuesday, August 26, 2014

12 Volt DC Power Suplly Adaptor

This series of images you can apply to make an adapter or power suplly with the output voltage (V DC output 12V). Power supply in the only protected by a capacitor as a safety if the power supply is connected to the load on the circuit.

So I recommend using 35V capacitor with a minimum specification. The security of power supply to power the more we can menggunakkan transistor TIP, but I have not discussed it. To the diode bridge can be compiled from the 4 then you solder the diode bridge rectifier into one or you can buy a bridge rectifier so that the comb-shaped (sideways) or the box. At least I would suggest using a diode bridge 1 Ampere, in a series of adapters, the bigger the better course of ampere diode current in the circuit. Diodes like toll roads, and current as a car passing by. The larger and the width of the existing highway, the faster the flow of runs and through the circuit.

For the circuit power supply 5 V, you can change the volt regulator on the type 7805 and 7905. This application applies equally in this series. For variations such as fuse or circuit switch on / off you can try it yourself.

Transformer 18 V + - 1 A minimum CT

Minimum of 35 V + Capacitor

Monday, August 25, 2014

24V DC Powered Beeper with 4 Separate Inputs

24v DC is a very popular voltage used in industrial settings. This hobby schema below was designed to accept four different 24v DC alarm input signals, which are then used to drive a single low power beeper. The beeper is a magnetic type with its own oscillator/driver. The four diodes form an “OR” gate so any one of the four inputs will cause the beeper to make noise. A CMOS version of the popular 555 timer is used to strobe the beeper on and off at about 1Hz.

Thursday, August 21, 2014

DC Motor Speed Controller Wiring diagram Schematic

This schema takes advantage of the voltage drop across bridge rectifier diodes to produce a 5-position variable voltage supply to a DC fan or other small DC motor. It is not as efficient as a switch-mode schema but it has the virtues of simplicity and no switching hash. The four full-wave bridges are connected so that each has two pairs of series diodes in parallel, giving a voltage drop of about 1.4V, depending on the load current.

DC Motor Speed Controller Circuit diagram:

DC Motor Speed Controller Circuit Diagram

The rotary switch should have "make before break" contacts which should be rated to take currents up to about an amp or so. For higher currents, higher rated bridge rectifiers and a suitably rugged rotary switch (or solenoids) will be required. If you want smaller voltage steps, you could use the commoned AC inputs on the bridge rectifiers to give intermediate steps on the speed switch.

Source by : Streampowers

Tuesday, August 19, 2014

Variable DC Power Supply

A Variable DC Power Supply is one of the most useful tools on the electronics hobbyists workbench. This schema is not an absolute novelty, but it is simple, reliable, "rugged" and short-proof, featuring variable voltage up to 24V and variable current limiting up to 2A. Well suited to supply the diagram shown in this website. You can adapt it to your own requirements as explained in the notes below.

Parts:
P1____________500R Linear Potentiometer P2_____________10K Log. Potentiometer R1,R2___________2K2 1/2W Resistors R3____________330R 1/4W Resistor R4____________150R 1/4W Resistor R5______________1R 5W Resistor C1___________3300µF 35V Electrolytic Capacitor (see Notes) C2______________1µF 63V Polyester Capacitor D1,D2________1N5402 200V 3A Diodes D3_____________5mm. Red LED Q1____________BC182 50V 100mA NPN Transistor Q2____________BD139 80V 1.5A NPN Transistor Q3____________BC212 50V 100mA PNP Transistor Q4 __________2N3055 60V 15A NPN Transistor T1_____________220V Primary, 36V Center-tapped Secondary 50VA Mains transformer (see Notes) PL1____________Male Mains plug SW1____________SPST Mains switch Notes: * P1 sets the maximum output current you want to be delivered by the power supply at a given output voltage. * P2 sets the output voltage and must be a logarithmic taper type, in order to obtain a more linear scale voltage indication. * You can choose the Transformer on the grounds of maximum voltage and current output needed. Best choices are: 36, 40 or 48V center-tapped and 50, 75, 80 or 100VA. * Capacitor C1 can be 2200 to 6800µF, 35 to 50V. * Q4 must be mounted on a good heatsink in order to withstand sustained output short-schema. In some cases the rear panel of the metal box in which you will enclose the schema can do the job. * The 2N3055 transistor (Q4) can be replaced with the slightly less powerful TIP3055 type

Saturday, August 16, 2014

Temperature controlled DC fan

Here is a simple schema based on two transistors that can be used to control the speed of a 12 V DC fan depending on the temperature.A thermistor (R1) is used to sense the temperature. When the temperature increases the base current of Q1 (BC 547) increases which in turn decreases the collector voltage of the same transistor. Since the collector of Q1 is coupled to the base of Q2 (BD 140), the decrease in collector voltage of Q1 forward biases the Q2 more and so do the speed of the motor. Also, the brightness of the LED will be proportional to the speed of the motor.

Notes.

* The R1 can be a 15K @ 20°C ,N.T.C thermistor.
* The M1 can be a 12V,700mA fan motor.
* The capacitor C1 must be rated 25V.
* The schema can be powered from a 12V PP3 battery or 12V DC power supply.
* Assemble the schema on a good quality PCB or common board.

Monday, August 11, 2014

LM317 Variable DC Power Supply

LM317-Variable DC Power Supply Circuit diagram :

Variable DC Power Supply-Circuit Diagram

This power supply is based on the LM317 Variable Regulator. The input of the regulator needs to be around 28 Volts DC and it will output a DC voltage from 1.25vdc to 25 vdc. To adjust the output voltage simply turn the 5k ohm pot. The regulator will supply 1.5 amps of current.