|
.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) |
