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Simple Pre-Regulator – Circuit Schematic
Simple Pre-Regulator
There will be many times where it is desirable to use the P05 supply module from a higher voltage source. For example, if you want to add balanced inputs.....
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 a.....
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,.....
pc power box with e fuse – Circuit Schematic
pc power box with e fuse
This little circuit will help you to remove all surplus small ac mains adaptors from your desktop. The circuit is nothing, but a smart dc power box direct.....
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; y.....
Logic PSU With Over-Voltage Protection – Circuit Schematic
Logic PSU With Over-Voltage Protection
A simple 5 Volt regulated PSU featuring overvoltage protection. The 5 volt regulated power supply for TTL and 74LS series integrated circuits, has to be v.....
High-Power Car Battery Eliminator – Circuit Schematic
High-Power Car Battery Eliminator
To operate car audio (or video) system from household 230V AC mains supply, you need a DC adaptor. DC adapters available in the market are generally costl.....
Fast Electronic Fuse – Circuit Schematic
Fast Electronic Fuse
A fast electronic fuse designed to operate on 230V AC with an adjustable trip current. When the current through the load exceeds a level determined by the.....
Electronic Fuse Employs A Relay – Circuit Schematic
Electronic Fuse Employs A Relay
While many power supplies can be set to limit their output current to a defined level, to protect the circuit they are powering, no such protection is ava.....
Circuit Project: 12KV High Voltage Generator – Circuit Schematic
Circuit Project: 12KV High Voltage Generator
The hobby circuit below uses an unusual method to generate about 12, 000 volts with about 5uA of current. Two SCRs form two pulse generator circuits. The two SC...
Ampere or Current Booster Circuit – Circuit Schematic
Ampere or Current Booster Circuit
Small and very useful circuit, Can be built on a veroboard Volt regulators such as the LM708, and LM317 series (and others) sometimes need to provide a li.....
Alternative Halogen Power Supply – Circuit Schematic
Alternative Halogen Power Supply
Readers who do not care to modify the power supply of an old PC into a suitable halogen power source (see our April 2006 issue), may find the present desi.....
Adjustable Symmetrical Power Supply Using LM317 and LM337 – Circuit Schematic
Adjustable Symmetrical Power Supply Using LM317 and LM337
The circuit was designed to provide an adjustment with a power supply that is symmetrically designed while providing a voltage range of 1.25V to 30V at 1A.....
9 Volt 2 Ampere DC Power SupplyCircuit – Circuit Schematic
9 Volt 2 Ampere DC Power SupplyCircuit
A simple 9 Volt 2 amp supply using a single IC regulator. There is little to be said about this circuit. All the work is done by the regulator. The 7809 c.....
5V Power Supply For On-Train Radio Camera – Circuit Schematic
5V Power Supply For On-Train Radio Camera
A radio camera on a model railway should transmit constantly while the train is moving and continue transmitting for a few minutes after the train stops ...
48V Phantom (Microphone) Power Supply – Circuit Schematic
48V Phantom (Microphone) Power Supply
48 V ‘phantom powering has become the standard for professional condenser microphones. The supply (or rather bias) voltage is applied over both wires of.....
1.5 - 35 Volt DC Regulated Power Supply – Circuit Schematic
1.5 - 35 Volt DC Regulated Power Supply
The easy way to power your projects Here is the circuit diagram of regulated power supply. It is a small power supply that provides a regulated voltage, a.....
Uninterruptible Power Supply (UPS): BasicCircuit – Circuit Schematic
Uninterruptible Power Supply (UPS): BasicCircuit
The circuit drawn pertains to a regular industrial UPS (Uninterruptible Power Supply), which shows how the batteries take control during an outage in elec.....
Low Voltage Power Supply Without Transformer – Circuit Schematic
Low Voltage Power Supply Without Transformer
The circuit diagram was designed to create a power supply without utilizing any transformer circuit. This circuit illustrates the advantages as well as th.....
0-20V 3A bench PSU – Circuit Schematic
0-20V 3A bench PSU
It`s a little late to calculate ohm`s law right now, as far as I can see 24V/2A should dissipate 1, 88W in the 0, 47 ohm resistor and 4W in the 0, 1 ohm resisto...