Circuit Electronics: 11/09/07

Morse Code Practice Oscillator

This simple code practice oscillator project for beginners to Continuous Wave Morse Code uses a 555 timer to generate a dit or dah sound when the key is pressed.

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More circuit by IC 555
More about Oscillator Generator
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Read link : http://www.electronics-project-design.com/CodePracticeOscillator.html

Ham Radio Circuit - Morse Code Filter Project

This project will help to filter out the interference signal and ensure that the signal received from the Morse code station stand out.

Read more : http://www.electronics-project-design.com/HamRadioCircuit.html

USB Battery Charger Circuit

This application circuit uses the MCP73853/MCP73855 linear charge management controllers for cost sensitive applications. They are specially designed for USB applications and adhere to all the USB specifications governing the USB power bus.

Read more : http://www.electronics-project-design.com/BatteryChargerCircuit.html

DC DC Converter Circuit

Get an output of 0.6V to 5.0V DC 10A from an input voltage range of 4.5V to 20V DC using Linear Technology DC DC Converter Module.

Read more : http://www.electronics-project-design.com/DC-DC-Converter-Module.html

Constructing a 12V DC Switch Mode Power Supply

Construct a 12 VDC, 120 mA switch mode supply from AC source of 85-265 VAC.

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More Circuit construct a power supply
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souec: http://www.electronics-project-design.com/SwitchModePowerSupply.html

Constructing a Dual Polarity Supply

supply. With the appropriate choice of transformer and 3-terminal voltage regulator pairs you can easily build a small power supply delivering up to one amp at +/- 5V, +/- 9V, +/- 12V, +/-15V or +/-18V.

Read more : http://www.electronics-project-design.com/DualPowerSupply.html

Variable DC Supply

Another version of variable DC supply using LM317 that uses an LED to show the ON/OFF status of the supply.

Read more : http://www.electronics-project-design.com/VariableDCPowerSupply.html

Constructing a universal DC Supply

This is a basic, text-book, variable DC supply voltage regulator circuit using an LM317 from input supply of 7-20 V AC or 7-30V DC . The output voltage can be set to anywhere in the range 1.5V to 30V.

Read more : http://www.electronics-project-design.com/UniversalPowerSupply.html

Simple fixed 5V DC Power Supplies Project

This project provides the schematic and the parts list needed to construct a simple Supply from an input supply of 7-20 V AC or 7-30V DC. Two DC voltage outputs are available; 5V and variable from 5V upwards.

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More about 5v dc supply circuit
7805+Mj2955 power supply 5V 5A for digital circuit.
Simple 5V 1A Switching regulator by IC LM2575-5.0
5V 5A switching regulator for digital by LM2678

Source : http://www.electronics-project-design.com/DCPowerSupply.html

This project uses a LM338 adjustable 3 terminal regulator to supply a current of up to 5A over a variable output voltage of 2V to 25V DC.

Related Links
More about variable dc supply circuit
More about DC Voltage Regulator Circuit
More about Shunt Regulator Circuit
More about Dual Power Supply Circuit

Source:
http://www.electronics-project-design.com/PowerSupplySchematic.html

Circuit Electronics