Voltase hobby: converter

Showing posts with label converter. Show all posts

Friday, October 17, 2014

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.

Sunday, September 14, 2014

Voltage Converter 0 5v to 6v Wiring diagram Schematic

This is a Simple Voltage Converter 0.5v to 6v Circuit Diagram. Conventional silicon transistors just cant operate at voltages less than about 0.7v. Old germanium transistors could be used, but those are hard to find these days and most are rather large in size. Some new n-channel MOSFET devices with very low gate-source threshold voltage can operate at quite low voltages. Ive been experimenting with various devices and came up with one electronic schema (shown below), which demonstrates how to boost the low voltage from a single solar cell to a higher voltage.

Voltage Converter 0.5v to 6v Circuit Diagram

The key component in the schema below is a cheap single logic device from Texas Instruments. It turns out that TIs 74AUC family of parts can work down to about 0.45 volts. I tried one of their single schmitt trigger parts and found I was able to make on oscillator function nicely at 0.5 volts. I then used a charge pump technique and a cheap NPN transistor to form a low power flyback converter.

This hobby schema can produce about 6 volts at the output from a 0.5v input. The idea is to use this boost schema to generate the higher starting voltage needed by a much more powerful DC to DC converter. Once started, part of the converters output could then be feed back to the input, to sustain converter operation. This is known as a "bootstrap" technique. In the future, I hope to post a schema which can supply several watts of power from a 0.5v input voltage. This would be ideal for charging a battery using power from a single large solar cell or several smaller cells wired in parallel.

Drown By : Dave Jhonson

Monday, September 8, 2014

Simple1 5 4 5V to 9V Converter Wiring diagram Schematic

This is a Simple1.5.4.5V to 9V Converter Circuit Diagram. Build a Simple1.5.4.5V to 9V Converter Circuit Diagram.

1.5.4.5V to 9V Converter Circuit Diagram

Thursday, September 4, 2014

Square A to Sine Wave Converter Wiring diagram Schematic

Build a Square A to Sine Wave Converter Circuit Diagram. This is a simple schema diagram in this schema using Two pairs of MOSFETs form a bridge that alternately switches current in opposite directions. Two parallel-resonant LC diagram complete the converter. The Ll/C1 combination is resonant at the fundamental frequency; the L2/C2 combination is resonant at the clock frequency`s third harmonic and acts as a trap.

Square A to Sine Wave Converter Circuit Diagram

Tl and C3 ensure that both halves of the MOSFET bridge are never on at the same time by providing a common delay to the gate drive of each half. Select the values of R1 and C3 to yield a time constant that`s less than 5% of the clock`s period. You can add an output amplifier for additional buffering and conditioning of the schema`s sine-wave output.

Monday, September 1, 2014

12 V Glow Plug Converter

Most small internal-combustion engines commonly used in the model-building world use glow plugs for starting. Unfortunately, glow plugs have an operating voltage of 1.5 V, while fuel pumps, starter motors, chargers and the like generally run on 12 V. This means that a separate battery is always needed to power the glow plug. The standard solution is to use an additional 2-V lead storage battery, with a power diode in series to reduce the voltage by approximately 0.5 V. However, this has the annoying consequence that more than 30 percent of the energy is dissipated in the diode. Naturally, this is far from being efficient.

12-V Glow Plug Converter Circuit diagram :

12-V

12-V Glow Plug Converter Circuit Diagram

The converter presented here allows glow plugs to be powered from the 12-V storage battery that is usually used for fuelling, charging, starting and so on. A car battery can also be used as a power source. Furthermore, this schema is con-siderably more efficient than the approach of using a 2-V battery with a series power diode.

The heart of the DC/DC converter is IC1, a MAX 1627. The converter works according to the well-known step-down principle, using a coil and an electrolytic capacitor. Here the switching stage is not integrated into the IC, so we are free to select a FET according to the desired current level. In this case, we have selected a 2SJ349 (T1), but any other type of logic-level FET with a low value of RDSonwould also be satisfactory. Of course, the FET must be able to handle the required high currents.

Diode D1 is a fast Schottky diode, which must be rated to handle the charging currents for C2 and C3. This diode must also be a fairly hefty type. The internal resistances of coil L1 and capacitors C2 and C3 must be as low as possible. This ensures efficient conversion and prevents the components from becoming too warm.

The resistor network R2/R3 causes 87 percent of the output voltage to be applied to the FB pin of IC1. This means that an output voltage of 1.5 V will cause a voltage of approximately 1.3 V to be present at the FB pin. The IC always tries to drive the switching stage such that it ‘sees’ a voltage of 1.3 V on the FB input. If desired, a different output voltage can be provided by modifying the values of R2 and R3.

When assembling the schema, ensure that C5 and C1 are placed as close as possible to IC1, and use sufficiently heavy wiring between the 12-V input and the 1-5-V output, since large cur-rents flow in this part of the schema. A glow plug can easily draw around 5 A, and the charging current flowing through the coil and into C2 and C3 is a lot higher than this!

Author : P. Goossens

Sunday, August 31, 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.

Friday, August 29, 2014

Simple Power Converter Wiring diagram Schematic

This simlpe Power Converter Circuit Diagram consists of an a stable multivibrator driving a push-pull pair of transistors into the transformer primary. The multivibrator frequency should~equal around 1 or 2kHz. For higher de voltages, voltage multipliers on the secondary schema have been used successfully to generate 10 k V from a 40~stage multiplier like the one shown.

Power Converter Circuit Diagram

High Current Step Up Converter Using MAX641

High Current Step-Up Converter Using MAX641 integrated schema, manufactured by Maxim IC, can be designed a very simple step-up converter using few electronic components. This step-up high voltage converter electronic projects allows a maximum output current up to 1A.

High Current Step-Up Converter Circuit Diagram

Low battery voltage detector input compare LB1 with internal reference of 1.31 V. LBO output goes in low state when the voltage at pin 1 falls below 1.31 V. The threshold voltage for "low battery", is determined by voltage divider R1-R2.

LED D1 illuminates the LBO output when the input voltage falls below 2.62 V.
Input voltage must remain below 5 V. The maximum effectiveness is 80% conversion.

Tuesday, August 26, 2014

Sine wave to square wave converter Wiring diagram Schematic

This is a simple Sine wave-to-square wave converter Circuit Diagram. Many signals are digitally generated or transmitted as square waves. It is often desirable to convert these signals into sine. In this Sine wave-to-square wave converter Circuit Diagram The sine input is ac coupled by capacitor C; Rl and R2 bias the input midway between Vn and Vp, the input threshold voltages to provide a square wave at the output.

Sine wave-to-square wave converter Circuit Diagram