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Archive for the ‘power supply’ Category

3.7V Li-Ion battery charger circuit

Monday, March 2nd, 2015

From the comments on our earlier standalone Linear Li-Ion battery charger with thermal regulation in ThinSOT app note post, Jan writes: Nice chip, indeed. Unfortunately not easy to find stocked – here I can get it only from Farnell (5 euro + VAT a pop) or Digikey ($3/pc + VAT +...

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Posted in power supply | 6 Comments »

Simple DIY lab power supply

Monday, January 26th, 2015

Bajdi  made this DIY lab power supply and wrote a post on his blog detailing its assembly: My DIY lab PSU has 10 binding posts in total. The ones on the left provide 12V, 5V and 3V3. The 12V output comes straight from the laptop power supply. The 5V and 3V3 are...

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DIY PSU console

Friday, January 23rd, 2015

Simon wrote a post on his blog detailing his DIY PSU console assembly: If I was going to build a power supply display add on, I decided to add some current limiting to it as well - but it had to be simple, cheap, and work with the panel meters. Yes you...

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Digitally controlled bench PSU project update

Monday, October 20th, 2014

Yet another update on Bertho’s digitally controlled bench PSU project we covered previously: Did some test-bed assembling today and did a dry-test of the power board. The good news... the power board did not blow up ;-) The aux PSU for +/-12V analog and the 5V logic supply switcher is working...

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Posted in DIY, power supply | 1 Comment »

Mini high voltage power supply

Monday, October 13th, 2014

Victor8o5 posted detailed instructions of how to make this high voltage power supply. He writes: WARNING: Before you start making anything please take a moment and read this: This circuit is intended to be used for educational and experimental purposes (electrostatic experiences, franklin bell experiment, plasma generation, gas ionization, electronic igniter,...

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DIY small bench power supply

Tuesday, September 23rd, 2014

newtonn2 posted detailed instructions of how to make this DIY small bench power supply that can adjust with precision current or voltage: After making my Mini Adjustable Power Supply I was very happy with it, but I was missing a more accurate control of the voltage and current. So I...

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ATX Breakout Board bench-top power supply build

Friday, September 19th, 2014

Kevin Rye shared his ATX breakout board bench-top power supply build in the project log forum: It took 3 weeks for my ATX Breakout Board to arrive from Seeed, but I finally got it! I was so excited to finally be able to make a bench-top power supply. I've always wanted...

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Posted in ATX BB, power supply, project logs | 3 Comments »

Digitally controlled bench PSU project update

Monday, September 1st, 2014

An update on Bertho's digitally controlled bench PSU project, we wrote about it previously: Finally some spare time to get the PCBs finished and on order. Lets see how many brainfarts are there to be discovered ;-) Expected delivery in a couple of weeks, so there is some time before I can...

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Posted in power supply | 6 Comments »

DIY 60W adjustable electrical load

Friday, August 22nd, 2014

A DIY 60W adjustable electrical load project from Electro-Labs: In this project, we are building a useful board which should take place on your bench. It is an adjustable electrical load which can sink up to 5A @ 60W continuously. This board will come to aid when you need to draw...

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Posted in DIY, power supply | No Comments »

Eddystone EC10 communication receiver restoration and PSU add-in

Monday, August 18th, 2014

Dilshan Jayakody writes: Recently I got vintage Eddystone EC10 MK1 communication receiver from friend of mine and it is completely dead when it comes to me. EC10 MK1 is one of Eddystone's very early solid state communications receivers and it use 10 PNP Germanium transistors. This receiver cover 550 kHz...

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Posted in power supply, repair | 1 Comment »

Digitally controlled bench PSU

Thursday, July 31st, 2014

Bertho posted a digitally controlled PSU design in the forum. He writes: The design is for 0...30V and 0...3A (90W) controllable at ~1mV and ~0.1mA steps. The actual accuracy is still out for testing and I assume that noise and non-linearity will be a factor to look at when time comes. The...

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Posted in power supply | 2 Comments »

+/-12V dual power supply

Tuesday, July 29th, 2014

A power supply build by Rajkumar of Electronics Lab: This project is a solution to power up most of devices or projects requiring dual (+/-12V) power supply. Symmetric +/-12 VDC power supply has been designed for audio applications, can power up microphone pre-amplifier, audio buffers, audio mixer, distributions amplifier, headphone amplifier, VU...

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Hand powered USB charger from hacked IKEA flashlight

Saturday, July 19th, 2014

Werner sends this handy hack he found at IKEAHackers. Giovanni Gentile devised this simple hack which mods an IKEA Ljusa hand powered flashlight into a USB charger. "The procedure was simple, it was enough to eliminate some resistors and use a capacitor sufficient to handle the charge given by the...

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Posted in hacks, how-to, power supply, USB | No Comments »

Cheap battery-powered micro-controller projects

Wednesday, June 25th, 2014

An article on cheap battery-powered micro-controller projects by Nerd Ralph: Once the higher cost of a 9V battery is factored in (about $1.50), the 9V battery is clearly more expensive than a 3V coin cell. However you may have a cheap source of 9V batteries - smoke detectors. I've found...

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5v/3.3v power supply PCB

Wednesday, June 18th, 2014

MickM has been working on creating a power supply: Here is a simple but versatile power supply board. It uses either a TO-220 7805 or a TO-92 78L05 (or other voltages). Power LED is optional, and can be on-board or remote with a header. Power switch is optional, install a...

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DIY prototyping board with 3.3V, 5V, 12V and -12V built in power supplies

Monday, June 9th, 2014

Electro Labs' new project the DIY prototyping board with 3.3V, 5V, 12V and -12V built in power supplies: This DIY Prototyping Board is designed to provide all the most used supply voltages that a designer will need during prototyping a circuit. The switching power supplies on the board output 3.3V, 5V,...

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9V to 48V DC-DC converter

Friday, June 6th, 2014

Konstantin Dimitrov over at Electronics Lab writes: This project is a 8-12Vdc to +48Vdc DC-DC converter based on MC34063 switching regulator. It's a simple project of a DC-DC converter to make a phantom power supply for professional microphones. It can deliver 15-20mA at 48VDC. It 's based on MC34063 DC-DC...

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Posted in PCBs, power supply | 12 Comments »

0-30V laboratory power supply

Thursday, June 5th, 2014

Hare's the 0-30V laboratory power supply project by Arief Laksono of Electronics Lab: This project is based on the 0-30 VDC Stabilized Power Supply with Current Control 0.002-3 A and a new PCB layout is introduced here. It's a stabilized power supply with variable output voltage in the range 0-30Vdc (33Vdc peak) -...

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Posted in power supply | 1 Comment »

Hantek PPS 2320A review

Friday, May 9th, 2014

Alan Parekh of Hacked Gadgets writes:Thanks to Circuit Specialists for sending in this 3 chanel power supply. The Hantek PPS 2320A sure packs in a ton of features for the price. The video below goes through the unboxing of the power supply and a quick run through its features. Overall...

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Posted in kit biz, power supply | No Comments »

Designing a high voltage power supply for Nixie tube projects

Monday, May 5th, 2014

A PCB layout for the switch-mode HV PSU by Jan Rychter: I've posted a page describing the design of a HV PSU (High-Voltage Power Supply) that generates up to 220V from a 12V input. In addition to that, it also provides 2*Vout (so, up to 440V, for dekatrons), and two outputs...

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Posted in PCBs, power supply | 2 Comments »

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