Variable DC Power Supply That Fits In Your Pocket ! - Page 1
Forum section: electronics / projects

author: Kedar264
author_rank: Regular Contributor
timestamp: October 13, 2015, 05:35:40 pm
content: Let's Make Ultra Small Sized Dc Variable Lab Bench Power Supply Using Buck Boost Converter Module And 1A Lithium ion Battery charging Board From ebay.Watch Videohttps://youtu.be/hzYS6GtqRs0" Its So Small That You Can Carry It Anywhere !"This Variable Power Supply Is Excellent Starter Electronics Project For Begineers , its Modular So You Can Buy Each Module From ebay at Quiet Cheap Price .Buy Parts Here? Dc Buck Boost Converter Module (2.26$)http://www.ebay.com/sch/i.html?_sop=15&_nkw=buck+boost+converter+cc&rt=nc&LH_BIN=1?1A Lithium Ion Battery Charging Board (1$)http://www.ebay.com/sch/i.html?_sop=15&_nkw=tp4056&rt=nc&LH_BIN=1li-ion Battery Can be reused from your old cellphones For Free !This Buck Boost Regulator Uses Most Popular Lm 2596 and Xl6009 For Step Up And Step Down Respectively . This Dc-Dc Buck Boost Converter Is Capable of Supplying 1.25 - 35 Volts With 1.5 A CurrentThe CC (Onstant Current ) & CV (Constant Voltage) Ability Makes This Chip Perfect For Small portable Power Supply . The Great Thing About This Diy Project is Its Cheap Cost And Portability it gives you freedom to test any electronics at remote locations.Enjoy The Step By Step Tutorial Procedure To Make This PoWer Supply !

author: MrAureliusR
author_rank: Unknown
timestamp: October 19, 2015, 01:38:58 am
content: I doubt that it will terribly safe, but yes it would work. Unless the LM2576 is fake, like most of those available on eBay. It's probably easier to order legitimate parts from Newark or Digikey and build a simple buck/boost circuit yourself. You'd be surprised how easy it is to put together a switching circuit -- the datasheets usually contain good reference designs that an intermediate electronics hobbyist can definitely do on their own.Not to sound completely pessimistic, but are those parts from your eBay store?

author: Arhammon
author_rank: Contributor
timestamp: October 19, 2015, 06:14:28 am
content: Quote from: Kedar264 on October 13, 2015, 05:35:40 pm35*1.5=52.5W Unfortunately, there is no chance to get so much power.

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 19, 2015, 06:23:13 am
content: Do Lithium-ion batteries really have enough capacity to run a power supply for long?

author: SteveLy
author_rank: Regular Contributor
timestamp: October 19, 2015, 07:56:32 am
content: Love the accent. Go India! Lot of brain power brewing in India as any serious MOOC students would know.@crispy_tofy: battery that size will be typically 1-2Ah at 3.7V, so around 5+Wh, which is not bad for a pocket sized device. What it needs is a case though. Bare boards are no good for general use (esp. for something that's supposed to be portable).Edit:Sorry Kedar, I kinda spoke of you in the third person not realising that you posted aa link to your own video till I hit submit and scrolled back up. Nice work. Just put it in a case and you have a winner.

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 19, 2015, 08:38:28 am
content: Okay, makes sense. Thanks!

author: Halvmand
author_rank: Regular Contributor
timestamp: October 19, 2015, 10:14:42 pm
content: Neat little project. I'm temted to make something similar when I have finished some of my other projects.

author: jwm_
author_rank: Frequent Contributor
timestamp: October 19, 2015, 11:51:19 pm
content: The B3603 would probably make a better base. Plus it has been fully reverse engineered and custom open source firmware has been written. If you don't like the display, replacing the control board with your uC interface of your choice is trivial. It is step down, so you would want to use a step-up stage first, but that can be a fixed step up to 15V or whatever you want your max to be.one of the eevblog threads on ithttps://www.eevblog.com/forum/reviews/b3603-dcdc-buck-converter-mini-review-and-how-the-set-key-could-be-fatal/

author: rr100
author_rank: Frequent Contributor
timestamp: October 20, 2015, 10:23:23 am
content: That B3603 is a very nice choice, I put one myself in a case together with some binding posts and a connector so it can be powered from a laptop PS.People who see it invariably say: "just don't take that to the airport"...