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.4 watt 100% Radio Shack DC-DC Converter - This DC-DC converter ("inverter") needs nothing but unmodified Radio Shack parts. You don't need to build or wind any coils or transformers
+/-12V-> +/-5V Power Unit - This is  voltage converter to get  voltage of ±5V from  input voltage of ±12V. I am using  3 terminal voltage regulator for  voltage to be changed in this unit. As  regulator, LM317 is used for  positive voltage and LM337 is used for  negative voltage.  output current can make output in 1 A.  (app note)
+30V Power Supply with +5V - I made  power supply which makes about +30V with +5V power supply.  Direct current is changed into  alternating current by  oscillator which used  Schmitt trigger inverter which has  hysteretic characteristic and  resonance circuit.  high DC voltage (+50V) is made with  alternating voltage using  voltage amplification rectification circuit.  (app note)
+5V Power Supply Circuit - (electronic circuit)
+5V Switching regulator 1 - (electronic circuit)
+9 Volt*and*  9 Volt from One Battery! -  MAX1044 is a charge pump converter it uses a capacitor as a "bucket" to pump charge from one place to anor. It can be used to generate negative voltage easily.
µC Controls Charge Pump as Background Task  - 08/01/97 EDN-Design Ideas: Because of power consumption and cost, designers of battery-powered devices mainly choose components that run at 3V or lower. Unfortunately, many devices operate only at 5V, including LCDs with built-in drivers, programming lines of many EEPROMs and flash chips, and CMOS ADCs.....(design idea)
0.5v Negative Supply - Although not very efficient, this simple circuit, consisting of two LEDs and a photo diode, generates a negative voltage with a current level of a couple milliamps.  It is ideal for supplying a negative rail to low power “rail to rail” op amp circuits, which need to have a true zero volts output.
0.5v to 6v Voltage Converter - Conventional silicon transistors just can't 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. I've been experimenting with various devices and came up with one circuit (shown below), which demonstrates how to boost the low voltage from a single solar cell to a higher voltage.... ….(designed by David A. Johnson)
0-10V Control for RC Servos - In this circuit NE555 is configured as astable multivibrator.  main timing capacitor (220 nF) is always changed to  voltage level which is determined by  voltage on NE555 pin 5 (in this circuit that voltage is aroun 1.6V). When  timing capacitor is charged only with current coming through 33 kohm resistor.
10 Khz VFC uses Charge Pump Variation - 04/09/98 EDN-Design Ideas: (design idea)
100ma UltraLow Noise Charge Pump LED Supply with Output Current Adjust - Linear Technology LTC3201 (app note)
10-15w watt 100% Radio Shack DC-DC Converter - This DC-DC converter ("inverter") needs nothing but unmodified Radio Shack parts. You don't need to build or wind any coils or transformers.
12 Volt 30 Amp PSU - Using multiple power transistors to increase  current of 7812 IC voltage regulator (circuit)
12 Volt to 9 Volt DC Converter - Car Converter for12 Volt to 9V (Tony van Roon's electronic design)
13 VDC to 120 VAC Inverter - Ever needed a low power 120volt AC  power source for your car, van or truck? Well this circuit should do the trick for you. It will supply 15 watts of AC power to a device. It should power lamps, shavers, small stereos and small appliances. If you draw to much power the circuit will shut down all by itself. The output ...(electronic design)
13 VDC: 120 VAC Inverter Schematic - This Inverter takes 12 volt d.c  and steps it up to 120 volt a.c.  The wattage depends on which transistors you use for Q1 and Q2, as well as the "Amp Rating" of the transformer you use for T1. This inverter can be constructed to supply anywhere from 1 to 1000 (1 KW) watts.
14 Volt DC to 120 Volt AC Inverter (Aaron Cake) - Have you ever wanted to run a TV, stereo or other appliance while on the road or camping? Well, this inverter should solve that problem. It takes 12 VDC and steps it up to 120 VAC. The wattage depends on which tansistors you use for Q1 and Q2, as well as how "big" a transformer you use for T1. The inverter can be constructed to supply anywhere from 1 to 1000 (1 KW) watts. (schematic / circuit)
2 ICs Convert 4 20mA Signal to 0 5V Output - Maxim Application Notes / 823 / Jul-09  (app note)
2 Watt Switching Power Supply - In this small switching power supply, a Schmitt trigger oscillator is used to drive a switching transistor that supplies current to a small inductor. Energy is stored in the inductor while the transistor is on, and released into the load circuit when the transistor switches off. The output voltage is dependent on the load resistance and is limited by a zener diode that stops the oscillator when the voltage reaches about 14 volts. Higher or lower voltages can be obtained by adjusting the voltage divider that feeds the zener diode. The efficiency is about 80% using a high Q inductor.
500kHz 6a Monolithic Boost Converter LT1370 - DN183  Design Notes (Linear Technology) (app note)
5V Power Supply Teams Low Dropout Regulator Charge Pump - 01/08/04 EDN-Design Ideas: Auxiliary power of 3.3V is replacing  5V auxiliary power that "silver boxes" supply in most computer systems, but some circuits still require a 5V supply. Such systems impose  messy task of creating a central 5V auxiliary supply from  3.3V auxiliary supply and n routing 5V power throughout  morboard.....(design idea)
6 to 12 Volt Converter (Aaron Cake) - This circuit can provide up to 800mA of12V power from a 6 Volt supply. The circuit is simple, about 75% efficient and quite useful.
A 500kHz 6a Monolithic Boost Converter LT1370 - DN183  Design Notes (Linear Technology) (app note)
A doozy requiring some parts you can't get at the 'Shack. - You can make a doozy of a xenon strobe using the 12 volt DC in
AB-11/ PC Board Layout Checklist: DC-DC Converters - Fairchild Application Notes / (app note)
Active Shortwave Loop Antenna Loopifier? - ... (electronic design)
An Output Adjustable Flyback Converter - A high voltage step-up DC power supply using adjustable flyback conversion.
AN-1119: Voltage Doubler Design & Analysis - National Semiconductor Application Note  (app note)
AN-347: Shielding & Guarding - AN-347 Analog Devices Application Note  (app note)
AN-348: Avoiding Passive-Component Pitfalls - AN-348 Analog Devices Application Note  (app note) The Wrong Passive Component Can Derail Even  Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.
AN-349: Keys to Longer Life for CMOS - AN-349 Analog Devices Application Notes  (app note) Here's How CMOS Can be Protected Against Abuse
AN-4137/ Design Guidelines for Off-line Flyback Converters using FPS - Fairchild Application Notes / (app note)
AN-4137SC/ Chinese Translation: Design Guidelines for Off-line Flyback Converters using FPS - Fairchild Application Notes / (app note)
AN-4140/ Transformer Design Consideration for off-line Flyback Converters Using Fairchild Power Switch FPStm - Fairchild Application Notes / (app note)
AN-4146/ Design Guidelines for Quasi-Resonant Converters Using FSCQ-series Fairchild Power Switch FPStm - Fairchild Application Notes / (app note)
AN-4147/ Design Guidelines for RCD Snubber of Flyback - Fairchild Application Notes / (app note)
AN-53/ Implementing an RC5051 DC-DC Converter on Pentium II Motherboards - Fairchild Application Notes / (app note)
AN-703: Driving High Power LEDs - AN-703 Analog Devices Application Note  (app note)
AN-772: A Design & Manufacturing Guide for the Lead Frame Chip Scale Package - AN-772 Analog Devices Application Note  (app note)
Avoiding Passive-Component Pitfalls - AN-348 Analog Devices Application Note  (app note) The Wrong Passive Component Can Derail Even  Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.
Boost Controller Drives Buck Converter - 02/03/97 EDN-Design Ideas:   -By adding an external Switching Transistor, you can use a step up dc/dc Converter to step down voltages to produce an efficient Battery Powered Power Supply, this example Circuit can step down inputs as Low as2V to Outputs as Low as1.25V, with efficiency as high as 80%.....(design idea)
Boost converter works With Wide range negative input supply - 03/18/04 EDN-Design Ideas: Assume that a design requires positive voltage, but only a negative-voltage power source is available. Using a standard boost-converter IC in the circuit of Figure 1, you can efficiently generate a positive voltage from a negative source. The boost converter generates an output voltage that's higher than the input voltage.....(design idea)
Buck Boost Regulator Suits Battery Operation - 09/04/03 EDN-Design Ideas: A buck/boost converter can step a voltage up or down. Such a converter is appropriate for battery-powered applications. One application derives a regulated 14.1V at 1A from 12V solar panels with 9 to 18V variation. In this type of battery application, efficiency is an important factor; hence, this design uses an inexpensive synchronous-rectifier-based MC33166/7 circuit.....(design idea)
Buck converter charger also provides system power  - 05/22/97 EDN-Design Ideas: -Switching Regulator provides  charge voltage setpoint with Current regulation, and second Switching Regulator provides5V System Power -Many systems require long-time operation during periods of power loss. Often, a gel or wet-cell lead-acid battery is  best choice because of high capacity and relatively low cost. The battery charges.....(design idea)
Buck Converter Handles Battery Backup System - 04/24/03 EDN-Design Ideas: A synchronous buck converter is inherently bidirectional. That is, it transfers energy from input to output as a buck regulator when the output voltage is low, but, when the output voltage is high, the converter acts as a boost regulator, transferring power from output to input. This Design Idea shows how to use this bidirectional energy transfer to automatically recharge a battery when the mai.....(design idea)
Buck IC Boosts Battery voltage for White LED - 04/24/03 EDN-Design Ideas: White-light LEDs are finding their way into many markets that incandescent bulbs once served. Flashlights are among the newer applications in which reliability, ruggedness, and ability to control the power draw of the LEDs make these devices attractive. With incandescent bulbs, the power management for the device is a simple on-off switch.....(design idea)
Buck/Boost Charge Pump Regulator Powers White LEDs from a Wide 1.6 Volt to 5.5 Volt Input - Maxim Application Note #1021 (app note)
Buck/Boost Reference Design - This reference design presents an alternative to  typical boost power regulator. A buck converter IC is used to generate a higher voltage needed by  white light LED power from a Ni-Cd battery. This circuit operates by turning  high switch on, connecting  battery voltage across  inductor. Once sufficient energy is stored in  inductor
Buck/Boost Regulator Suits Battery Operation - 09/04/03 EDN-Design Ideas: A buck/boost converter can step a voltage up or down. Such a converter is appropriate for battery-powered applications. One application derives a regulated 14.1V at 1A from 12V solar panels with 9 to 18V variation. In this type of battery application, efficiency is an important factor; hence, this design uses an inexpensive synchronous-rectifier-based MC33166/7 circuit.....(design idea)
Build a Charge Pump with UltraLow Quiescent Current - 09/05/04 EDN-Design Ideas: Portable battery-powered devices often spend most of ir life in standby mode, in which  quiescent current of an internal boost converter continuously bleeds  battery. The quiescent current during standby can be larger than  actual load current. Though several inductor-based converters offer maximum quiescent current of less than 10 µA, designers.....(design idea)
Build a Transformer less 12V to 180V DC/DC Converter - 07/08/04 EDN-Design Ideas: Some transducers for portable or automotive applications need accurately regulated, high-voltage bias and draw little current. To produce such high voltages from a low battery voltage, designers typically use switch-mode dc/dc converters—generally, flyback converters. These converters exhibit high efficiency at medium or high output power.....(design idea)

 

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