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+/-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 added 4/05) |
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+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 hysteresis characteristic and resonance circuit.
high DC voltage (+50V) is made with alternating voltage using voltage amplification rectification circuit. (app note added 4/05) |
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+5V Power Supply Circuit: (electronic circuit added 4/05) |
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+5V Switching regulator (1): (electronic circuit added 2/07) |
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+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. (added 4/02) |
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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, charging takes around 2 milliseconds. When control voltage is appied to control input, charging current increased when conrol voltage
increases. When th econtrol voltage is 10V, charging takes around 1 millisecond. (added 4/05) |
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10 Khz VFC uses Charge Pump Variation: 04/09/98 EDN-Design Ideas / (added 6/06) |
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100ma UltraLow Noise Charge Pump LED Supply with Output Current Adjust: Linear Technology LTC3201 (app note added 2/05) |
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12 Volt 30 Amp PSU: Using multiple power transistors to increase current of 7812 IC voltage regulator (circuit added
11/06) |
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12 Volt DC to 120 Volt AC Inverter: this inverter should solve that problem. It takes12 VDC and steps it up to120 VAC.
-Wattage depends on which transistors you use for Q1 and Q2, as well as how "big" a transformer you use for T1. inverter can be constructed to supply anywhere from1 to1000 (1 KW)-Watts.
(added 4/02) |
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12 Volt to 9 Volt DC Converter: Car Converter for12 Volt to 9V (added 4/02) |
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2 ICs Convert 4 20mA Signal to 0 5V Output: Maxim Application Notes / 823 / Jul-09 (app note added 6/06) |
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2 Watt Switching Power Supply: from 6V to14V (added 4/02) |
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5V Power Supply Teams Low Dropout Regulator Charge Pump: 01/08/04 EDN Design Ideas / (added 1/05)
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.... |
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6 to 12 Volt Converter: This circuit can provide up to 800mA of12V power from a 6 Volt supply. The circuit is simple, about
75% efficient and quite useful. (added 4/02) |
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A 500kHz 6a Monolithic Boost Converter (LT1370): DN183 Design Notes (Linear Technology) (app note added 1/06) |
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A Design and Manufacturing Guide for the Lead Frame Chip Scale Package: AN-772 Analog Devices Application Note
(app note added 2/06) |
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AB-11 / PC Board Layout Checklist: DC-DC Converters: Fairchild Application Notes / (app note added 6/06) |
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An Output Adjustable Flyback Converter: A high voltage step-up DC power supply using adjustable flyback conversion.
(added 10/05) |
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AN-1119: Voltage Doubler Design and Analysis: National Semiconductor Application Note (app note added 2/06) |
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AN-347: Shielding and Guarding: AN-347 Analog Devices Application Note (app note added 2/06) |
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AN-348: Avoiding Passive-Component Pitfalls: AN-348 Analog Devices Application Note (app note added 2/06)
The Wrong Passive Component Can Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For. |
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AN-349: Keys to Longer Life for CMOS: AN-349 Analog Devices Application Note (app note added 2/06) Here's How CMOS Can be Protected Against Abuse |
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AN-4137 / Design Guidelines for Off-line Flyback Converters using FPS: Fairchild Application Notes / (app note added 6/06) |
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AN-4137SC / Chinese Translation: Design Guidelines for Off-line Flyback Converters using FPS: Fairchild Application Notes /
(app note added 6/06) |
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AN-4140 / Transformer Design Consideration for off-line Flyback Converters Using Fairchild Power Switch (FPStm): Fairchild
Application Notes / (app note added 6/06) |
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AN-4146 / Design Guidelines for Quasi-Resonant Converters Using FSCQ-series Fairchild Power Switch (FPStm): Fairchild
Application Notes / (app note added 6/06) |
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AN-4147 / Design Guidelines for RCD Snubber of Flyback: Fairchild Application Notes / (app note added 6/06) |
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AN-53 / Implementing an RC5051 DC-DC Converter on Pentium II Motherboards: Fairchild Application Notes / (app note added
6/06) |
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AN-703: Driving High Power LEDs: AN-703 Analog Devices Application Note (app note added 2/06) |
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AN-772: A Design and Manufacturing Guide for the Lead Frame Chip Scale Package: AN-772 Analog Devices Application Note
(app note added 2/06) |
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Avoiding Passive-Component Pitfalls: AN-348 Analog Devices Application Note (app note added 2/06)
The Wrong Passive Component Can Derail Even Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For. |
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Boost Controller Drives Buck Converter: 02/03/97 EDN Design Ideas / (added 3/05) -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% |
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Buck Converter Chargers also Provides System Power: 05/22/97 EDN Design Ideas / (added 4/02) -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 during normal operation and powers system during
power loss. These systems require a circuit to charge battery as well as to regulate system's VCC. The design must provide a current-limited voltage to battery for charging
and still develop system VCC in charge or discharge condition..... |
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Buck Converter Handles Battery Backup System: 04/24/03 EDN Design Ideas / (added 1/06) A synchronous buck
converter is inherently bidirectional. That is, it transfers energy from input to output as a buck regulator when output voltage is low, but, when output voltage is high,
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
mai...... |
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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 added 7/03) |
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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,.... (added 3/05) |
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Buck/Boost Regulator Suits Battery Operation: 09/04/03 EDN Design Ideas / (added 1/05) 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.... |
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Build a Charge Pump with UltraLow Quiescent Current: 09/05/04 EDN Design Ideas / (added 1/05) 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 usually prefer or require a
regu...... |
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Build a Transformerless 12V to 180V DC/DC Converter: 07)/08/04 EDN Design Ideas / (added 1/05) 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. |
