Posts Tagged ‘PSU’

Low voltage power supply unit

Thursday, March 24th, 2016

Dilshan Jayakody writes: In this post we introduce simple and flexible, regulated low voltage power supply unit. This power supply has provision for 4 outputs such as 1.5V, 1.8V, 2.5V and 3.3V. We mainly build this low voltage power supply unit to test (and power-up) low voltage MCUs, CPLDs and...

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Posted in power supply | 4 Comments »

Mullard 3-3 Amplifier project (part 2)

Tuesday, February 23rd, 2016

Dilshan Jayakody writes: This is a second article related to Mullard 3-3 Amplifier Project and in this article we introduce HT transformer and HT power supply related to this amplifier. As mentioned in previous post, power supply unit of this tube amplifier is constructed using 400V 5A bridge rectifier, 220µF...

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Posted in DIY | No Comments »

3A Power supply for USB devices

Tuesday, May 5th, 2015

Jayakody published a new build, a 3A Power supply for USB devices: This is 5V 3A power supply to drive two USB based devices simultaneously. This power supply is design around LM2576-5.0 switching regulator IC and the main reasons to choose this IC is its low parts count, small heat sink requirements...

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Posted in power supply, USB | 8 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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Posted in power supply | No Comments »

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 »

PiGateway upgraded to MightyBoost

Tuesday, September 23rd, 2014

Felix of LowPowerLab writes: Enter MightyBoost – a multi purpose PSU that can supply the power a Pi needs, and also be controllable by a Moteino (including wirelessly controllable if needed) such that it would duplicate the functionality of ATXRaspi. And most importantly to be able to run it on...

Posted in R-Pi | 4 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 »

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 »

Nixie HV switching PSU

Monday, April 14th, 2014

From the comments on our earlier HV Nixie DC-DC switching power supply post, here's a Nixie HV switching PSU by Nick De Smith: It is probably beyond the scope of this simple document to describe the operation of switch-mode power supplies (SMPSs) - suffice to say the technique relies on the voltage pulse...

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Posted in power supply | 4 Comments »

300V AC/DC variable power supply

Monday, April 7th, 2014

300V AC/DC variable power supply project by Dilshan Jayakody This 300V AC/DC variable PSU is designed for our vacuum-tube, MOSFET and some IGBT related experiments. This PSU consist with 0-300V Variac (variable auto-transformer), 700VA isolation transformer, which is described in previous blog post and high voltage AC-DC converter. Because of the...

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Posted in power supply | 2 Comments »

Simple 3.3V power supply unit

Wednesday, January 15th, 2014

Dilshan Jayakody  writes: Now a days 3.3V PSU is essential for microcontroller, programmable logic devices and for some analog components also (especially with some new ADCs). This is ultra-simple 3.3V power supply unit, which is suitable for above mentioned experiments. This power supply is based on, ON semiconductor’s MC33269T-3.3 LDO...

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Posted in power supply | 3 Comments »

Quick test of the PS-305D PSU

Friday, July 19th, 2013

Mats did a review of the PS-305D PSU he bought from Smart-Prototyping: I ran some basic measurements on the PS-305D (Linear 0-30V/0-5A, 1mA Display) I recently bought from Smart-Prototyping.The internal volt meter in the PSU seems reasonably well calibrated.Then I tested the Constant Current capabilities with having a direct short...

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Posted in kit biz | 11 Comments »

Digitally controlled power supply

Wednesday, January 16th, 2013

Wvdv2002 shared his digitally controlled power supply with us in the forums. It's capable of driving 0-18V while having a current controlled output of 0-3A. The brains of the design is the PIC18f46j50 which controls a switch mode regulator's voltage and current output through the MCP4822 two channel I2C DAC....

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Posted in project logs | 3 Comments »

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