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PCI-Bus with 3.3V Auxiliary Hot Swap Controller – Circuit Schematic
PCI-Bus with 3.3V Auxiliary Hot Swap Controller
The LTC ®4241 is a Hot Swap controller that allows a board to be safely inserted and removed from a live PCI-bus slot. It has a primary controller that control...
Synchronous Dual Mode Phase Modulated Full Bridge Controllers – Circuit Schematic
Synchronous Dual Mode Phase Modulated Full Bridge Controllers
The LTC3722-1/LTC3722-2 phase-shift PWM controllers provide all of the control and protection functions necessary to implement a high efficiency, zero voltage s...
Secondary-Side Optocoupler Driver – Circuit Schematic
Secondary-Side Optocoupler Driver
The LT ®4430 drives the opto-coupler that crosses the galvanic barrier in an isolated power supply. The IC contains a precision-trimmed reference, a high bandw...
Micropower Low Noise Boost Converters with Output Disconnect – Circuit Schematic
Micropower Low Noise Boost Converters with Output Disconnect
The LT3494/LT3494A are low noise boost converters with integrated power switch, Schottky diode and output disconnect circuitry. The parts use a novel* control t...
Transformer -- power supply – Circuit Schematic
Transformer -- power supply
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Variable PSU – Circuit Schematic
Variable PSU
A variable power supply with adjustable voltage and current outputs made with the L200 regulator. Using the versatile L200 voltage regulator, this power supply ...
Variable Dc Power Supply – Circuit Schematic
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 100V...
USB Fuse – Circuit Schematic
USB Fuse
Life in the 21st century would be almost unbearable without some of the computer peripherals that PC users now look on as essentials - take for example the USB ...
Transformerless 5 Volt Power Supply – Circuit Schematic
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 bet...
Switch-Mode Power Supply – Circuit Schematic
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 s...
Stablised Power Supply With Short-Circuit Indication – Circuit Schematic
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 ...
SMPSU With A Relay – Circuit Schematic
SMPSU With A Relay
Switched mode power supply units (SMPSUs) are popular but difficult to build oneself as well problematic when it comes to understanding their design principles....
Simple Electrification Unit – Circuit Schematic
Simple Electrification Unit
The circuit is intended for carrying out harmless experiments with high-voltage pulses and functions in a similar way as an electrified fence generator. The p. ...
Reset from Multiple Power Supplies – Circuit Schematic
Reset from Multiple Power Supplies
Processor based systems usually require a voltage supervisor chip to produce a clean reset pulse to the processor whenever a brown-out` condition of the power s...
Quad Power Supply For Hybrid Amplifier – Circuit Schematic
Quad Power Supply For Hybrid Amplifier
This power supply was designed for use with the Simple hybrid amp` published elsewhere in this issue. It is of course suitable for use in other applications as ...
Power Supply For USB Devices – Circuit Schematic
Power Supply For USB Devices
More and more equipment is sold that runs off internal rechargeable batteries. Although a matching charger is usually supplied in the package, there are also de...
Power MOSFET Bridge Rectifier – Circuit Schematic
Power MOSFET Bridge Rectifier
The losses in a bridge rectifier can easily become significant when low voltages are being rectified. The voltage drop across the bridge is a good 1. 5 V, which...
Negative Auxiliary Voltage – Circuit Schematic
Negative Auxiliary Voltage
Some circuits need a negative supply voltage that only has to supply a small current. Providing a separate transformer winding for this (possibly even with a re...
Mini High-Voltage Generator – Circuit Schematic
Mini High-Voltage Generator
Here`s a project that could be useful this summer on the beach, to stop anyone touching your things left on your beach towel while you`ve gone swimming; you mig...
Fuse Saver – Circuit Schematic
Fuse Saver
This circuit will be particularly useful to those hobbyists who use a breadboard` to try out ideas and who also use a simple home-made` DC power supply consisti...