Tag Archives: Power supply

Arduino Controlled Modular Bench Power Supply

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Denis @ envox.hr has designed a great PSU that is reliable, modular, programmable and of course Open source. The power supply is controlled by an Arduino and a touchscreen TFT screen is used to monitor and control it. It comes with a bunch of features you can check on the link below.

The programmable bench power supply project was an attempt to create reliable, modular, open and programmable power supply that can be used for various tasks starting with powering breadboard, charge (or to some extent discharge) batteries of various types and sizes or use as a tool in school/educational and science experiments.

Arduino Controlled Modular Bench Power Supply – [Link]

5V Symmetrical Regulated Power Supply

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This Project provides Positive and Negative (Dual Output) 5 V @ 1 A Regulated Power Supply.

Specifications

  • Input 7-0-7 VAC to 12-0-12 VAC or +/- 9 to 18 VDC
  • Output : Dual output ± 5 V @ 1 A regulated low ripple DC voltage
  • Heat-sink for regulator ICs
  • Onboard bridge rectifier to convert AC to DC
  • LED indication for both the outputs
  • Thermal overload/short circuit protection (provided by IC feature)
  • Screw terminal connector for easy input and output connection
  • Filter capacitors for low ripple DC output
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 46 mm x 60 mm

5V Symmetrical Regulated Power Supply – [Link]

SparkFun: A look inside some common power supplies

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MTaylor @ sparkfun.com takes a look inside different power supplies he has on his box.

Power supplies are everywhere these days. With the advent of switching power supplies, the cost of high-current supplies has radically dropped. Maybe you’ve noticed how the large, heavy, wall-wart style adapters are no longer lurking around your baseboards, falling out of their sockets? Or occupying several of your valuable power-strip positions? But not all power supplies are created equal.

SparkFun: A look inside some common power supplies – [Link]

Switch Mode Power Supply (SMPS) Topologies (part I)

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Microchip’s application note describes the basics of different SMPS topologies:

The industry drive toward smaller, lighter and more efficient electronics has led to the development of the Switch Mode Power Supply (SMPS). There are several topologies commonly used to implement SMPS. This application note, which is the first of a two-part series, explains the basics of different SMPS topologies. Applications of different topologies and their pros and cons are also discussed in detail. This application note will guide the user to select an appropriate topology for a given application, while providing useful information regarding selection of electrical and electronic components for a given SMPS design.

Switch Mode Power Supply (SMPS) Topologies (part I) – [Link]

5V & 12V Regulated Power Supply

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This project can be used to power up TTL and CMOS based projects, it provides 5 VDC & 12 VDC outputs with an onboard mains transformer.  The project is based on the industry popular 7800 series voltage regulator in TO220 packages.

Features

  • Input: 240 VAC
  • Output: 5 V, 12 V @ 600 mA regulated low ripple DC voltage
  • Thermal overload/short circuit protection (provided by IC feature)
  • Power Battery Terminal (PBT) for easy input and output connection
  • External On/Off switch connection possible
  • LED indication for outputs
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 87 mm x 49 mm

5V & 12V Regulated Power Supply – [Link]

3A Variable Bench PSU with Color Display

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by SHARANYADAS @ instructables.com:

I am playing with electronics since i was a child and made numerous circuits.But still now,i didn’t made any power supply unit for general purpose use.So tired of making PSU for each circuit,I decided to make a stable Bench PSU for general purpose use with some enhanced features.I decided to made the core power supply analog controlled and extra features digitally controlled. So that’s why i choose LM350 linear regulator chip as the heart because 3A is sufficient for day to day use.

3A Variable Bench PSU with Color Display – [Link]

Teardown & Repair of a Stanford Research PS350 5000V, 25W High Voltage Power Supply

In this episode Shahriar repairs a Stanford Research Systems Model PS350 5000V-25W High Voltage Power Supply. The unit continuously displays 2.5kV without the output being enabled and produces no output voltage. Verification of power supply voltages reveals the issue is linked to a disconnected 15V voltage regulator IC. After the repair, the output voltage is verified with both positive and negative outputs. The principle operation of the instrument as well as the Cockroft-Walton high voltage generator is reviewed.

Teardown & Repair of a Stanford Research PS350 5000V, 25W High Voltage Power Supply – [Link]

Hardware Protection – OverVoltage and OverCurrent

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Maurizio @ dev.emcelettronica.com discuss about the different aspects of protecting power supplies from overvoltage and overcurrent.

Power processing is one of the most important aspects on electronic design. The power is unique for a typical system because it gives the system life. Before starting to make the project for a power supply we need to analyze some aspects: Which kind of radio/electromagnetic interference is the device going to face ? What about maintenance requirements? And finally which environment conditions (temperature, humidity, vibrations) will the device be exposed to?

Hardware Protection – OverVoltage and OverCurrent – [Link]

Laser Diode Driver

LASER-DIODE-DRIVER-PIC

Laser Diode Driver project will help you safely drive (constant current) a 3 mW visible Laser Diode for your application.

  • Input supply – 2.5 to 6 VDC
  • Onboard preset to adjust the current flow to the Laser Diode
  • Power-On LED indicator
  • Header connector for easy input supply and LASER DIODE module connection
  • Laser diode is not included
  • Circuit is designed around Sanyo DL3148-025 LASER DIODE
  • PCB dimensions 37 mm x 42 mm

Laser Diode Driver – [Link]