power supply circuit

Current Limiting Power Supply

Published:2012/11/26 0:56:00 Author:muriel | Keyword: Current Limiting, Power Supply

This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluable when (for example) you power-up a project for the first time or soak-test a piece of equipment.   (View)

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9 Volt 2 Amp PSU

Published:2012/11/26 0:56:00 Author:muriel | Keyword: 9 Volt , 2 Amp, PSU

A simple 9 Volt 2 amp supply using a single IC regulator.   (View)

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Regulated DC power supply

Published:2012/11/26 0:55:00 Author:muriel | Keyword: Regulated , DC, power supply

This is a Regulated DC power supply with short circuit protection and with current limiter.   (View)

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The Output Adjustable Flyback Converter

Published:2012/11/26 0:55:00 Author:muriel | Keyword: Output, Adjustable, Flyback Converter

A high voltage step-up DC power supply using adjustable flyback conversion.   (View)

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Alarm Power Supply

Published:2012/11/26 0:54:00 Author:muriel | Keyword: Alarm Power Supply

A 12 Volt power suppiled designed for Ron's Modular Burglar Alarm. However, being a popular supply voltage this circuit will have many other uses as well.   (View)

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Basic UPS

Published:2012/11/26 0:52:00 Author:muriel | Keyword: Basic UPS

This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply. In the event of electrical supply line failure the battery takes over, with no spikes on the regulated supply.   (View)

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Universal DC-DC Convertor

Published:2012/11/26 0:50:00 Author:muriel | Keyword: Universal , DC-DC Convertor

This circuit will generate a smaller DC output voltage from a larger DC input voltage.It is quick and simple to make and by changing the value of the zener diode, the circuit can be universally adapted to provide other output voltages.The circuit and all diagrams represent a DC convertor with 12V battery input and 9Volt DC output.   (View)

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Transformerless Power Supply

Published:2012/11/26 0:49:00 Author:muriel | Keyword: Transformerless , Power Supply

  (View)

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Variable PSU

Published:2012/11/26 0:49:00 Author:muriel | Keyword: Variable PSU

A variable power supply with adjustable voltage and current outputs made with the L200 regulator.   (View)

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Nicad Battery Charger

Published:2012/11/26 0:48:00 Author:muriel | Keyword: Nicad Battery , Charger

A basic nicad battery charger using a single medium power transistor.   (View)

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Logic PSU with Overvoltage Protection

Published:2012/11/26 0:48:00 Author:muriel | Keyword: Logic PSU , Overvoltage Protection

A simple 5 Volt regulated PSU featuring overvoltage protection.   (View)

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Regulated 12 Volt Supply

Published:2012/11/23 1:04:00 Author:muriel | Keyword: Regulated , 12 Volt, Supply

  (View)

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12 Volt 30 Amp Power Supply

Published:2012/11/23 1:03:00 Author:muriel | Keyword: 12 Volt , 30 Amp, Power Supply

Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 30 amps.   (View)

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L200 Power Supply

Published:2012/11/23 1:03:00 Author:muriel | Keyword: L200, Power Supply

Power supply with variable voltage and fixed current regulation made using the ubiquitous L200C regulator.   (View)

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Gyrator Circuit

Published:2012/11/23 1:02:00 Author:muriel | Keyword: Gyrator Circuit

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Automatic Repeater

Published:2012/11/23 0:44:00 Author:muriel | Keyword: Automatic Repeater

This circuit will be of interest to the radio amateur and anyone posessing two radios, (one of which must be able to transmit i.e. a transceiver). It is a self powered (audio derived) repeater circuit for receiving a signal and re-transmitting it via the other radio.   (View)

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3 Band Equalizer circuits

Published:2012/11/19 21:42:00 Author:muriel | Keyword: 3 Band , Equalizer circuits

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1-W Linear FM Booster

Published:2012/11/11 20:06:00 Author:muriel | Keyword: 1-W, Linear, FM, Booster

This RF Amplifier is used for boosting small fm transmiters and bugs. It use two Philips 2N4427 and its power is about 1Watt. At the output you can drive any linear with BGY133 or BLY87 and so on. Its power supply has to give 500mA current at 12 Volts. More voltage can boost the distance but the transistors will be burned much earlier than usual.! In any case do not exceed the 15Volts. The Amp offers 15 dB in the area of 80Mhz to 110 Mhz. L4, L5, and L6 are 5mm diameter air coils, 8 turns, with wire 1mm wire diameter.An easy project, with great results.   (View)

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15dB UHF TV Antenna Booster

Published:2012/11/11 19:58:00 Author:muriel | Keyword: 15dB , UHF, TV Antenna , Booster

This is an UHF band TV antenna preamplifier circuit With 15dB gain to build easily. It is formed based on BF180 UHF Transistor. The first stage is an band pass filter constructed by the C1, CV1, L1, L4, C7 and C3, the second stage is a base-common voltage amplifier with low input impedance to match. Build the L1 ~ L4 as air core coil to obtain high Q-Factor. After assembling, pack it into a proper metallic box and connect the ground of the circuit to the box to reduce noise effect.   (View)

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The distributed power supply system circuit diagram

Published:2012/11/9 20:14:00 Author:Ecco | Keyword: distributed power supply , system

The system consists of a front - end converter and back-end converter: front - end converter (Front End Converter) inlcudes AC / DC converter with power factor correction (PFC) and 400/ 48 V DC / DC converter, both of them are composed of several modules connected in parallel. AC input voltage is rectified by the PFC converter to get 400V DC voltage.   (View)

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