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Simple circuits sort out the highest voltage - 11/09/06 EDN-Design Ideas:
Greatest-of-three voltage detector drives indicators and external display.....(design
idea added 9/08) |
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Simple Regulator has one Active Part - 03/16/95 EDN-Design Ideas: (design
idea added 03/03/03) |
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Simple Regulator Monitors its Input Voltage - 09/12/97 EDN-Design Ideas:
(design idea added 3/03) |
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Simple Regulator Provides ±12V from 5V Source - National Semiconductor Application
Note (app note added 2/06) |
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Simple temperature regulated FAN speed controller - This regulator uses a P-FET to
change the positive supply voltage to a FAN an NTC resistor mounted on the device that
needs cooling will change the fan speed, the temperature on the heat sink will
therefore be constant, while the FAN speed will change, depending on power disipated
The RPM output signal from most FAN types will continue to function,....(schematic
added 05/08) |
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Simple Ultra-Low Dropout Regulator - DN32 Design Notes (Linear Technology)
(app note added 1/06) |
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Simple VCOM adjustment uses any Logic Supply Voltage - 09/30/04 EDN-Design Ideas:
All TFT (thin-film-transistor)LCD panels require at least one appropriately tuned V
COM signal to provide a reference point for the panel's backplane. The exact value of
V COM varies from panel to panel, so the manufacturer must program the voltage at the
factory to match the characteristics of each screen.....(design idea added 1/05) |
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Single Transistor Forward Reference Design - Single Transistor Forward with Vin
115/220 Vac and Vout 12 V. The output current 10 A with 120 W of output power. (added
3/05) |
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Small Variable Power Supply - (electronic circuit added 10/05) |
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Soft Start power Supply - The output voltage rises slowly and reaches 15 V in 5
seconds. In order to perform this soft-start function, the LM317 voltage
regulator IC requires an external universal PNP transistor and the L200 uses its
internal comparator (pin 2). After switch-on, the rising voltage on the positive
side of the charging electrolytic ....(added 10/05) |
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Soft Start PSU - ….(design added 03/08) |
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Soft start regulator starts at 0V - 05/06/96 EDN-Design Ideas: Venerable
mechanical meter can measure ultralow currents, with some help.....(design idea added
2/06) |
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Stabilised power unit - I made the stabilised power unit which used the switching
regulator. AC100 V is used for the input of the power unit. The output voltage can be
changed from 5 V to 30 V. The output current can pour a maximum of 4 A. I made this
power unit as the power unit of the electronic circuits making for the
experiment...(schematic added 05/08) |
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Super Power Supply Voltage and Current Regulated - With Suitable Output
TransistorsThis Supply Can handle almost any Voltage or Current. This Design is based
on the Discontinued MC1466L Integrated Circuit. But Now you can make it using
Descrete Parts. TransistorsCaps and Resistors. Although not Really DifficultI don't
believe this Project is Suitable for the Beginner....(electronic schematic added
12/08) |
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Supply Saves Circuits from Lax Predecessors - 11/23/94 EDN-Design Ideas: The
lab supply in Fig 1 automatically sets its output voltage to zero whenever you switch
it on. Thus, the lab supply can't fry your circuit if the previous user left the
voltage turned up too high. The circuit supplies 1 to 25V dc because it uses an LM317
regulator. When you turn on the supply, the bridge develops a voltage.....(design idea
added 3/03) |
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Sync. Buck with Integrated FET Forward Dual Sync. Buck Reference Design - Sync.
Buck with Integrated FET, Forward, Dual Sync. Buck with Vin of 48. Vout of 15 V, 3.3
V, 1.8 V, 1.5 V. The output power is 47 W. (added 3/05) |
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Synchronous Buck Reference Design - This reference design is synchronous
Buck/Boost converter that can deliver up to 3.8 A of continuous current at -5 V from a
5 V input. This topology uses a synchronous buck controller (TPS5103) referenced to
the negative output rail. The synchronous MOSFETs allow this design to achieve a peak
efficiency of 88%. In addition, the TPS5103 provides a soft-start function and
over-current protection. (added 3/05) |
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Terminal Regulator is Adjustable - National Semiconductor Application Note
08-Nov-2000/ (app note added 3/03) |
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The Effect of Long-Term Drift on Voltage References - AN-713 Analog Devices
Application Note (app note added 2/06) |
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The LM105-An Improved Positive Regulator - National Semiconductor Application Note
(app note added 2/06) |
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The ZLDO Series of Low Dropout Voltage Regulators - Zetec Semiconductors
Applications Notes The ZLDO series of regulators provide the lowest dropout voltage
currently available in their class. Application examples covering dropout and other
important features of the series are discussed. (app note added 2/06) |
|
Thermometer Applications of the REF-02 - AN-18 Analog Devices App Note (app
note added 2/06) |
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Tiny Regulators Drive White LED Backlights - DN231 Design Notes (Linear
Technology) (app note added 2/06) |
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Tiny Regulators Drive White LED Backlights #2 - Linear Technology Design Note 231
(app note added 02/05) |
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Transformerless Power Supply (Aaron Cake) - (electronic design added 08/08) |
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Transformerless Power Supply (jose pino) - Simple, low cost and easy to build
power supply. Ideal for applications that doesn't requiere too much power. (5/28/2006) |
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Transformerless Power Supply (Len Galasso) - This power supply uses the reactance
of a non-polarized capacitor at 60hz to step-down the voltage from the normal 117VAC
level to about 20 volts or so, which is rectified by the diode….(circuit design added
7/06) |
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Transformerless Power Supply (Ron J) - This circuit will supply up to about 20ma
at 12 volts. It uses capacitive reactance instead of resistance, so it doesn't
generate very much heat. The circuit was desigusing an optically-isolated triac....
(added 6/03) |
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Transistor quickly wakes sleeping LDO - 09/01/98 EDN-Design Ideas: Portable
systems, such as telephone handsets, make extensive use of low-dropout (LDO)regulators.
These components provide noise-sensitive parts with a stable power-supply line. When a
telephone enters standby mode, most of the circuits go to sleep by disabling the LDO's
outputs. Operating.....(design idea added 110/05) |
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Two AA cells power step down regulator - 01/07/99 EDN-Design Ideas: [Note:
File contains multiple circuits scroll to find this circuit] DC/DC conversion is
particularly challenging when both the input and output voltages are low. Step-up ICs
that operate with inputs lower than 1V are available, but step-down ICs that accept
input voltages.... / (schematic / circuit added 10/02) |
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Two AA cells power step-down regulator - 01/07/99 EDN-Design Ideas: DC/DC
conversion is particularly challenging when both the input and output voltages are
low. Step-up ICs that operate with inputs lower than 1V are available, but step-down
ICs that accept input voltages near 2V are not. Thus, providing efficient power for
the low-voltage CPU in a handheld product can be a problem if the power source is a
two-cell AA battery. The battery’s output.....(design idea added 08/05) |
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UCC3809 Evaluation Module - The UCC3809EVM evaluation module is an isolated 10-W,
3.3-V converter designed for telecom input voltages, nominally -48 VDC, but ranging
from -32 VDC to -75 VDC. The UCC3809 economy primary-side controller is used as the
pulse-width modulator (PWM), combined with a TLV431 low-voltage adjustable-precision
shunt regulator on the secondary side.....(added 3/05) |
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UCC3819 250-W PFC Boost Follower PreRegulator Design - This is an App Note that
describes a reference design. This paper reviews the benefits of a boost follower
topology and the design of a 250-W PFC boost follower preregulator. (added 3/05) |
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UCC38C42 25-Watt Self-Resonant Reset Forward - This is an application note that
describes a reference design. This reference design presents a self-resonant reset
forward converter using the UCC38C42 BiCMOS Low-Power Current-Mode PWM Controller. The
input voltage for this converter is compatible with the telecom input voltage range of
36 VDC to 72 VDC. The converter is designed to operate at a switching
frequency....(added 3/05) |
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Ultra Low Drop Linear Regulator - (electronic Circuit / Schematic added 10/04) |
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Ultra Low Noise Low Dropout Regulator Achieves 6 Nv/√Hz Noise Floor - 06/23/05 EDN-Design
Ideas: LDO has ultralow-noise output.....(design idea added 2/06) |
|
Ultra-Low Dropout Regulator - DN32 Design Notes (Linear Technology) (app
note added 1/06) |
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Universal DC-to-DC Converter - (electronic schematic / circuit added 4/02) |
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Universal PSU - A Universal Power supply based on the L200 regulator, which
includes an outboard pass transistor to boost output currents up to 4 amps.
(added 11/05) |
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Use a TL431 shunt regulator to limit high AC input voltage - 10/25/07 EDN-Design
Ideas: This circuit clamps input-ac voltages to levels safe for the operation of
the power MOSFET in an SMPS.....(design idea added 9/08) |
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Variable 3 to 24 Volt/3 Amp Power Supply - regulated power supply can be adjusted
from3 to25 volts and is current limited (added 5/02) |
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Variable DC Power Supply - Voltage range:0.7-24 Volt Current limiting
range:50mA-2A (added 9/04) |
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Variable Dual Lab Power Supply - can supply from +/-1.2V up to about +/-25V, will
current limit at around 800mA (added 5/02) |
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Variable load tests Voltage sources - 07/19/01 EDN-Design Ideas: The circuit
in Figure 1 serves as a variable, current-sink load for testing voltage sources. You
use digital commands to set the load current of the device under test over a wide
range, independently of the device under test's output voltage. The circuit comprises
an AD558 DAC, IC1, which provides a reference voltage at Point A.....(design idea
added 1/05) |
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Variable Power Supply - based on versatile L200 voltage regulator, independent
voltage (3-15V) and current (10mA-2A) limits (added 5/02) |
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Variable power supply - Using the versatile L200 voltage regulator, this power
supply has independent voltage and current limits. The mains transformer has a 12volt,
2 amp rated secondary, the primary winding should equal the electricity supply in your
country, which is 240V here in the UK....(schematic / circuit added 08/08) |
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Variable Power Supply 1- 30 Volt@ 1.5A - This is a simple, but low-ripple power
supply, and an excellent project if you're starting out in electronics. It will
suit your needs for most of your bench testing and prototype applications. The
output is adjustable from 1.2 volts to about 30 volts. Maximum current is about
1.5 amps which is also sufficient for most of your tinkering....(Tony van Roon's
circuit added 11/05) |
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Variable Voltage and Current Power Supply - Another method of using opamps to
regulate a power supply is shown below. The power transformer requires an additional
winding to supply the op-amps with a bipolar voltage (+/- 8 volts), and the negative
voltage is also used to generate a reference voltage below ground so that the output
voltage can be adjusted all the way down to 0. Current limiting is...(electronic
schematic / circuit added 04/03/02) |
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Variable Voltage Regulation - ….(design added 03/08) |
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Varying Brightness AC Lamp - SCR is used to slowly vary the intensity of a120 volt
light bulb by controlling the Time that the AC line voltage is applied to the lamp
during each half cycle (added 4/02) |
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VCOM Adjustment uses Any Logic Supply Voltage - 09/30/04 EDN-Design Ideas:
All TFT (thin-film-transistor)LCD panels require at least one appropriately tuned V
COM signal to provide a reference point for the panel's backplane. The exact value of
V COM varies from panel to panel, so the manufacturer must program the voltage at the
factory to match the characteristics of each screen.....(design idea added 1/05) |
|
Versatile Micropower Voltage Reference Provides Resistor Programmable Output from 0.4V
to 18V - DN351 Design Notes (Linear Technology) (app note added 1/06) |
|
Video Design Idea: Build your own laboratory precision voltage reference -
05/24/07 EDN-Design Ideas: Mark Thoren, mixed-signal application engineering
manager with Linear Technology, demonstrates an amplifier-based circuit design for a
relatively inexpensive precision voltage source.....(design idea added 9/08) |
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Voltage Inverter #2(Aaron Cake) - simple and inexpensive circuit can produce a
dual (positive and negative) voltage from a single supply input, extremely useful for
powering OpAmp and other circuits that require a dual voltage from a single battery
(added 03/03/03) |
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Voltage Reference Circuit Collection - AN42 Linear Technology A wide variety of
voltage reference circuits are detailed in this extensive guidebook of circuits. The
detailed schematics cover simple and precision approaches at a variety of power
levels. Included are 2 and 3 terminal devices in series and shunt modes for positive
and negative polarities..... |
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Voltage reference improves JFET - 10/26/00 EDN-Design Ideas: /The common
JFET current-source in Figure 1a has average output impedance and depends heavily on
the JFET's VP and IDSS variations. These manufacturing variations limit the initial
accuracy of the current setpoint that the circuit can obtain with a fixed R1. Most
users of JFET current-sources sample VP.....(design idea added 05/03) |
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Voltage reference improves JFET - 10/26/00 EDN-Design Ideas: The common JFET
current-source in Figure 1a has average output impedance and depends heavily on the
JFET's VP and I DSS variations....(design idea added 08/08/08) |
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Voltage Reference is software Programmable - 08/18/05 EDN-Design Ideas:
Obtain extra reference voltages from existing ones.....(design idea added 11/05) |
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Voltage Reference sets Current limit - 11/19/98 EDN-Design Ideas: (design
idea added 2/06) |
|
Voltage Regulator - simple regulated12V power supply using1-transistor regulator
circuit (added 5/02) |
|
Voltage Regulator Circuit - A collection of simple but useful circuits made with
silicon diodes. Scroll to find the voltage regulator circuit. (6/06) |
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Voltage Regulator controls scanner lamp brightness - 05/13/99 EDN-Design
Ideas:.....(design idea added 2/06) |
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Voltage Regulator goes Digital - 11/24/99 EDN-Design Ideas: / Power
consumption and failing batteries are key issues in battery-operated applications.
Features in the new generation of series voltage regulators address these concerns.
For example, National Semiconductor's LP2951 micropower voltage regulator provides a
logic-level output signal indicating a low regulated.....(design idea added 5/02) |
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Voltage Regulator w/ Series-Pass Transistor - What is the function of a voltage
regulator circuit? It’s basically this, maintain a precise voltage regardless of the
current drawn by the load. Three basic components are needed to achieve good voltage
regulation....(spice design added 02/09) |
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Wide Input Range High Efficiency DDR Termination Power Supply Achieves Fast Transient
Response - DN281 Design Notes (Linear Technology) (app note added 1/06) |
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Wide range regulator delivers 12V 3A output from 16 to 100V source - 06/23/05 EDN-Design
Ideas: Buck regulator tackles high input voltages.....(design idea added 9/08) |
|
Wide range Voltage Regulator automatically selects operating mode - 06/09/05 EDN-Design
Ideas: Regulator seamlessly adapts to wide output range.....(design idea added
10/05) |
|
Zener Voltage Regulation and Thermal Resistance - MicroNote 204 from Microsem
(app note added 6/06) |
|
Zener Voltage Regulation with Current - MicroNote 202 from Microsem (app
note added 6/06) |
|
Zener Voltage Regulation with Temperature - MicroNote 203 from Microsem (app
note added 6/06) |
|
ZLDO Series of Low Dropout Voltage Regulators - Zetec Semiconductors
Applications Notes The ZLDO series of regulators provide the lowest dropout voltage
currently available in their class. Application examples covering dropout and other
important features of the series are discussed. (app note added 2/06) |
