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AC to DC & DC to DC
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8051 / 8052
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H Bridge Circuit
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Power Supply Circuits
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AC-DC & DC-DC Circuits
Stablised Power Supply With Short-Circuit Indication
Here is an efficient 4-stage stabilised power supply unit for testing electronic circuits. It provides well regulated and stabilised output, which is essential for most electronic circuits to give proper results. The circuit provides an audio-visual indication if there is a short circuit in the PCB under test, so the power supply to the circuit un
Step-Down Converter Controller
The TPS6420x controller is designed to operate from one to three series-connected cells or from a 3. 3 V or 5 V supply obtained from a USB port. At its output it can produce 3. 3 V at 2 A, suitable for powering a microcontroller-based system. With a suitable choice of external components (inductor, P-channel MOSFET and Schottky diode) the device...
Switch-Mode Power Supply
National Semiconductor has been producing and designing ICs for use in switch-mode power supplies for many years. The application of these devices is normally straightforward, helped by the excellent documentation that is available. A typical example of a switch-mode power supply is that based on the LM2671 or LM2674. The components for it are ava
Transformerless 5 Volt Power Supply
An increasing number of appliances draw a very small current from the power supply. If you need to design a mains powered device, you could generally choose between a linear and a switch-mode power supply. However, what if the appliance`s total power consumption is very small Transformer-based power supplies are bulky, while the switchers are gen
Variable Dc Power Supply
You can choose the Transformer on the grounds of maximum voltage and current output needed. Best choices are: 36, 40 or 48V center-tapped and 50, 75, 80 or 100VA. Q4 must be mounted on a good heatsink in order to withstand sustained output short-circuit. In some cases the rear panel of the metal box in which you will enclose the circuit can do the
Transformer -- power supply
Inductorless 5V to -5V Converter
The LTC1046 is a 50mA monolithic CMOS switched capacitor voltage converter. It plugs in for the ICL7660/LTC1044 in 5V applications where more output current is needed. The device is optimized to provide high current capability for input voltages of 6V or less. It trades off operating voltage to get higher output current. The LTC1046 provides sever
400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect
The LTC ®3525-3/LTC3525-3. 3/LTC3525-5 are high efficiency synchronous step-up DC/DC converters with output disconnect that can start up with an input as low as 1V. They offer a compact, high efficiency alternative to charge pumps in single cell or dual cell alkaline or Li-Ion applications. Only three small external components are required. The LTC
200mA Buck-Boost Synchronous DC/DC Converters
The LTC3531/LTC3531-3. 3/LTC3531-3 are synchronous buck-boost DC/DC converters that operate from input voltages above, below or equal to the output voltage. The topology incorporated in the ICs provides a continuous transfer through all operating modes, making the product ideal for single cell Li-Ion and multicell alkaline or nickel applications. T
hydrogen generation by ultra-short-pulse power supply
A novel method of hydrogen generation by water electrolysis using an ultra-short-pulse power supply Authors: NAOHIRO SHIMIZU, SOUZABURO HOTTA, TAKAYUKI SEKIYA and OSAMU ODA Abstract A novel method of hydrogen generation by water electrolysis using ultra-short-pulse power supply is demonstrated. The..
Low-Cost Complete Power Solution for Powered Devices Includes a 12V Buck Converter
MAX5953A provides a simple, inexpensive, complete, non-isolated power IC solution for Powered Device (PD) in a Power-over-Ethernet (PoE) system..
±15V or ±12V Output Switch-Mode Power Supply Has Wide Input-Voltage Range
A switch-mode power supply provides ±15V or ±12V @ 0.5A output from a 4.5V to 12V input Wide input voltage range allows flexibility to be powered from a regulated DC voltage..
Inductor Choice Yields Performance Tradeoffs in DC-DC Converters
Cost, size, resistance, and current capability drive the choice of inductor for most stepdown dc-dc switching converters..
Step-up Converter with LDO Beats SEPIC Efficiency
A step-up converter followed by an LDO regulator offers better battery life than a classic SEPIC design when operating from one lithium-ion cell..
Layout Guidelines for the MAX16974/MAX16975/MAX16976 DC-DC Converters
Optimize the layout of the MAX16974/MAX16975/MAX16976 high-performance DC-DC converters, standard buck controllers designed for automotive applications..
Isolated Power Supply Is Suitable For Telecom/Datacom Applications
A 50W isolated forward-converter switching supply for telecom applications is described. Most aspects of the design are discussed..
15 volt 1 Amp regulated power supply circuit
2w switching power supply
desktop power supply
lm338 power supply 13 8v 5a
single cell power supply
Power Supply/OPUS Kill Switch
After searching for a few days i cant find a solution for this idea. Sorry for the wordy`ness I`m creating a switch panel in the dash containing 4..
200W ATX PC POWER SUPPLY
I bring you wiring diagram of PCs power supply of DTK company. This power supply has ATX design and 200W performance. I was drawed diagram, when I repaired this power supply. This power supply circuit uses chip TL494. Similar circuit is used in the most power supplies with output power about 200W. Device use push-pull transistor circuit with
Power Supply Rail Rejection
Power Supply Design Made Easy
Using Integrated Switching Regulators When it came to power supply design, most Engineers would scratch their head thinking, œWhere do I start? Decision must be decided concerning..
MDRC Mark 4 20 Amp Power Supply
I was asked by the MDRC committee of the day if I would like to take on the role as Electronic components and project officer, I didn`t see any problem with this and agreed. After being elected into the position I soon found out that a little more time would be required than I expected, most of which was spent answering m
13.8V 20A linear power supply
The design presented here is a little bit unusual in its arrangement, but offers some advantages over the usual designs that I will explain in the following paragraphs. First, let`s start from the basics: A linear power supply has a transformer that steps down the line voltage to some voltage that is higher than what will be required at the...
Tube Radio Power Supply
Power Supply for the SSY-1 YAG Laser
The SSY-1 is a small pulsed Nd YAG laser originally used as part of the laser rangefinder in the M1 Abrams tank. The laser head and PFN-1 pulse forming network (flashlamp capacitor, inductor and diode) are readily available for under $250 as surplus on eBay and Meredith Instruments. For more information on the laser, a useful source of informatio
5 volt power supply
multiple volt power supply
Full Bridge Converter Circuit
Free Energy Circuits
Battery Charger Circuits
Solar Cell Circuits
Current Limiting Circuits
Micro Power Circuits
High Voltage Circuits
Switching Power Supply Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
Digital Signal Integrity
Interconnection and Timing of Digital Circuits
CMOS Circuits Tutorial