HANDY 0 12V DC POWER SUPPLY ELECTRONIC DIAGRAM

HANDY 0-12V DC POWER SUPPLY ELECTRONIC DIAGRAM

For heat protection, heat sink is needed for the BD679 transistor. It is because it will be over tempered when works more than 200mA.

FEATURES:
0v to 12 volt output:
- 700mA with M 2155
- 1.4amp with M 2156
- 1A with 16v AC 1.5 amp plug pack

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6 to 15V DC to DC Converter

A very efficient 6V to 15V DC to DC converter using LM2585 is shown here. LM2585 is a monolithic integrated voltage converter IC that can be used in various applications like flyback converters, boost converters, forward converters, multiple output converters etc. The circuit requires minimum number of external components and the IC can source up to 3A output current.

 

6 to 15V DC to DC Converter Circuit diagram :

6 to 15V DC to DC Converter Circuit Diagram

Here the IC is wired as a boost converter where resistors R1 and R2 are used to set the output voltage .The junction of R1 and R2 is connected to the feedback pin of IC1. Capacitor C4 is the input filter while capacitor C1 the filter for output. Network comprising of resistor R1 and capacitor C2 is meant for frequency compensation. Inductor L1 stores the energy for acquiring boost conversion.

Notes:    

• Assemble the circuit on a good quality PCB.
• LM2585 requires a heatsink.
• Output voltage is according to the equation Vout =( (R1/R2)+1) x 1.23.
• Capacitors other than C4 and C1 are ceramic capacitors.
• Maximum output current LM2585 can source is 3A. 

Source : Circuitstoday

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DC Voltage Doubler

The The Circuit of DC Voltage Doubler was designed on arrived type Power Supply. Please study carefully and comprehend by the side of schematic design photos of The Circuit of DC Voltage Doubler to pick up factor in sequence.

DC Voltage Doubler Schematic

This is a economical DC Voltage Doubler Circuit diagram, which requires a hardly any components and strength of character surrender 10V from a 5V power supply. If the oscillator essential be present built from a non-functional gate next is essential 2 supplementary components: R1 and C3. The a large amount principal parameters of this voltage doubler circuit are set arrived the submit less than. memorandum with the aim of as of the IC tolerances these data may possibly contain approximately differences.

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74LS192 Computer controller 4 DC motors

This circuit has proven useful when interfacing my computer to home made robotics. It is easy to build and use and it can control two DC motors of any current or voltage rating, depending on the rating of the relays. The circuit also provides two shaft encoders for positional feedback to the computer.

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3A Adjustable 3 30V Regulated DC Power Supply

This power supply is meant as an auxiliary or as a permanent power supply for all common circuits based on a stabilized DC voltage between 3 and 30V provided that the consumption does not exceed 3A. Of course this power supply unit can also be used for other purposes. Be replacing the trimmer by a potentiometer, it may even be used as an adjustable power supply unit. A good quality heatsink must be used.
[...]
Parts list:
R1 = 8.2K
R2 = 2.2K
R3 = 680R
R4 = 1K
R5 = 82K
R6 = 0.18R/5W
C1 = 470p
C2 = 100nF-63V
C3 = 100nF-63V
C4 = 100uF-63V
C5 = 10KuF-60V
D1-D6 = 6.6A
Q1 = MJ3001 (Darligton)
IC1 = UA723D
Specifications:
* Overload protected
* Sshort-circuit stable
* Output current: max. 3A
* Output ripple voltage: 0.5mV
* Output voltage: adjustable from 3 to 30V, stabilized
* Input voltage: 9 to 30V AC (depending on the desired output voltage)

Source: http://www.extremecircuits.net/2010/02/3-30v-3a-adjustable-regulated-dc-power.html

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Simplest DC Motor Speed Controller Circuit Diagram

The effect can be eliminated by means of Ri compensation, which essentially entails measuring the motor’s current consumption, relating this to the motor’s instantaneous drop i across Ri, and increasing the supply voltage accordingly.

The load current is measured as the drop across sensing resistor R3. For optimum results, this impedance must be kept about equal to that of the motor. Figure 2 shows the practical circuit of the motor driver based on a power operational amplifier.
Simple DC operated motors with a permanent magnetic stator behave as an independently energized motor. The speed of an ideal motor with an, infinitely low internal resistance is in direct proportion to the voltage applied, irrespective of the torque.
The motor thus runs at a speed at which its reverse electromotive force (e.m.f.) equals the supply voltage.
The reverse e.m.f. is directly proportional to the force of the (constant) magnetic field, and the motor speed.
In theory, therefore, the motor speed can be held constant with a constant supply voltage. The speed reduction observed in practice arises from the voltage drop across the internal resistance, Ri, of the armature winding. Thus, when the motor is loaded, its current consumption, and hence Vai, increases, reducing the effective supply voltage.
The Type Ll65 £rom SGS can supply up to 3 A at a maximum supply voltage of 36 and is therefore eminently suitable for the present applications. cation. Capacitors C1 and Cz suppress noise on the reverse e.m.f. from the motor.
The basic set-up of the supply required here is shown in Fig. l.

In· fact, this calls for a voltage source with a negative output impedance, since it caters for a higher output voltage when the . load is increased.

Due care should be taken, however, in so l extending the circuit, because this readily leads to instability. The motor itself already forms a fairly complex load, since the revolving rotor winding is mainly inductive, and the rotor itself represents a fairly large capacitance.

Simplest DC Motor Speed Controller Circuit Diagram

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Electronic Fuse for DC Short Circuit Protection

This is an electronic fuse that protects the load against short schema.

Project Description

Relays must be chosen with a voltage value equals to the input voltage. Don’t omit using the 100uF capacitor with appropriate voltage value with respect to the input voltage. If you can’t provide, you can use C106 instead of BRX46.

You can adjust the current with using 10K potentiometer. If you will use the fuse with very high currents, lower the 0R6 5W resistor value (ex. 0R47, 0R33, 0R22 or 0R1). Watt value of the resistor should be increased also.

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LT3582 12 DC 5V to 12V DC Converter Wiring diagram Schematic

Using LT3582-12 dual channel DC DC converter integrated schema, manufactured by Linear Technology, can be designed a very simple step up dc converter. This 5 to 12V c converter electronic project provide both positive and negative outputs required in many biasing applications such as active matrix OLED (organic light-emitting diode)displays as well as CCD (charge coupled device) applications.

LT3582-12 DC 5V to 12V DC Converter Circuit Diagram

The LT3582 offer an I2C interface that can dynamically program output voltages, power sequencing and output voltage ramps as the application requires. The LT3582’s positive output voltage can be set between 3.2V and 12.775 in 25mV steps, whereas the negative output can be set between -1.2V and -13.95V in 50mV steps. The LT3582-12 is preconfigured with ±12V output, requiring no future programming.

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12V to 24V Simple DC Converter Circuit

12V to 24V Simple DC Converter Circuit

A acquaintance of me wants the ambit enhances Voltage 12VDC from be 24VDC or DC to DC Converter 12V to 24V. By fix acknowledge that be the ambit is simple , body not difficult. I afresh admonish this ambit try out anticipate use aloof Transistors D1616 = 2 pcs. with agent the small-sized , mix with added accessories a little alone again. Follow a account has can to use this ambit with baby fan motor.

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PWM Based Speed Control for DC Motors

There are several methods for controlling the speed of DC motors. One simple method is to add series resistance using a rheostat. As considerable power is consumed in the rheostat, this method is not economical. Another method is to use a series switch that can be closed/opened rapidly. This type of control is termed as chopper control. We’ve described here a PWM-based chopper schema that smoothly controls the speed of general-purpose DC motors.

Fig.1: Block diagram of PWM-based speed controller

Fig. 1 shows the block diagram of a basic PWM-based chopper. The schema shown in Fig. 2 is designed as per this diagram. A dual timer IC (NE556) is used to configure both the astable as well as the monostable multivibrator. Timing components for the astable are chosen to provide a frequency of 546 Hz, while the monostable components are selected to obtain a maximum pulsewidth of 2.42 ms. Diode D1 improves duty factor of the astable oscillator output, whereas D2 acts as a free-wheeling diode. Transistor SL100 drives the motor, while the 22-ohm, 2W resistor (R4) serves as a current limiter, avoiding overheating of the transistor. The DPDT switch enables direction reversal of the motor, as desired.

Fig. 2: The schema of PWM-based speed controller

The speed can be varied by adjusting VR1, which changes the threshold value to which capacitor C1 in the monostable schema is charged. This, in turn, determines its output pulsewidth and hence the average voltage applied to the motor. Waveforms shown in Fig. 3 depict the average voltage for controlling various speeds.

For effective speed control, ‘on’ period (TON) of the astable should be equal to the maximum pulsewidth (TON) of the monostable.

Fig. 3: Waveforms at different conditions of VR1

For higher voltage and power requirements, SL100 can be replaced by an appropriate MOSFET or IGBT with relevant changes in the drive schemary.

The schema costs around Rs 75.

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Tranceiver DC adapter

This DC adaptor provides a regulated 9V source for operating a transceiver in the car .The IC LM317 is mpounting tab is electrically connected to its output pin. so take this into account tour version of the adapter. The LM317T regulator dissipates 2 or 3 Watt in this circuit , so mount it on a 1- x -2 inch piece of 1/8 inch thick alumunium heatsink. Dont forget to give heatsink on the IC LM317.

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High Voltage DC Generator Wiring diagram Schematic

This schema is fed from a 12-V de power supply. The input to the schema is then amplified to provide a 10,000-Vdc output. The output of the up-converter is then fed into a 10 stage, high-voltage multiplier to produce an output of 10,000 Vdc.

High Voltage DC Generator Circuit Diagram

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