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Using LT3582-12 dual channel DC DC converter integrated circuit, 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. Simple LT3582-12 DC 5V to 12V DC Converter  Circuit Diagram

This is the 1.5V to 5V/12V DC/DC Converter with LT1073 Project. Small 1.5V to 5V or 12V DC/DC converter with LT1073 chip. The IC is available in three different versions, depending on output voltage. Two with fixed output voltage of 5V and 12V, and the most interesting that can be adjusted. The adjustment is done through a voltage divider with two resistors, of mass, output and Terminal 8, internally connected to the voltage comparator IC, which is responsible for stabilizing the output voltage. LT1073 has an internal everything you need to make a small DC / DC converter with a low operating voltage of only 95μA 1V and consumption without load. If you do not have a meter inductance, the inductive part of the drive is a bit more complicated to make, but we shall see some possible solutions. Capacitor also recommended by the manufacturer for the circuit is a bit hard to get, I have used a tantalum recovered from another power source, and the ripple voltage at the output is quite low....

This circuit is a 5v to 12 DC-DC step-up converter circuit which is specially ideal for the usb powered applications. A usb has two current supply modes.Before deecting the connected device the maximum supplies is 100mA to the load.when recognizing device its increases the output current up to 500mA.the controller (LT1618) also provides two input currents modes 100mA and 500mA which is selected by the user. Output currents are limited due to the increased potential difference at the output. When the demand of the load increases, output voltage will start to decrease. For example, if the circuit operates in the 100 mA input mode, when the load is 35 mA, the output voltage will be kept at 12V. But if the load increases to 50 mA, output voltage will reduce to 8V to maintain the constant 100 mA input current.

A simple scheme to generate the inverter voltage from 1.5V to 3V can be made ​​on the basis of slightly modified the well-known multivibrator. Under these denominations in the scheme of the frequency converter is approximately 130 kHz. Inductance value can be calculated or chosen experimentally. But you can simply adjust the frequency of the converter to produce maximum output voltage. Schottky diode VD1 can be replaced by any other similar characteristics. 1.5V to 3V Voltage Converter Circuit Diagram   For further stabilization of the output voltage can be applied to the zener voltage of 3V – 3.3V. This scheme can be used to power a LED or low power devices based on the microcontroller, for example, MSP430. Parts list : R1,R3 : 1K R2 : 2K2 C1 : 470pF C2 : 100uF/3,3V C3 : 1000uF L1 : 470uH VD1 : 15MQ040 VT1, VT2 : BC547

This circuit is a simple circuit to obtain a 5V and 12V DC power supply using one circuit.The two ICs which are using in this circuit are IC1(7812) and IC2(7805) for obtaining the required voltages. The transformer which is used in this circuit is step down transformer T1 which is rectified by Bridge B1 and filtered by capacitor C1 is used for reduce the ripple and get a smooth DC voltage.The IC1 regulates this voltage to obtain a steady 12V DC. The output of the IC1 will be regulated by the IC2 to obtain a steady 5V DC at its output. In this way both 12V and 5V DC are obtained.This power supply is very useful in when we need to DC voltage for the operation of a circuit..If we used 7806 instead of IC2 we will get 6V instead of 5V.Same if we used 7809 instead of IC1 we get 9V instead of 12V. Circuit Diagram   Notes.    *  The transformer T1 can be a 230V primary, 15V secondary, 1A step-down transformer. *  The switch S1 can be a SPST ON/OFF switch.   *...