Compact Power supply design (110/230VAC to 5VDC) like USB-charger

We are looking for professional help to design a compact power supply (like in the pictures).

The power supply will be part of a customized PCB and has to meet security standards (EMC/CE/UL).

It should be a transformer based switching power supply with an efficiency of >70% (e.g. based on OB2535). Input power will be ~80-250VAC and output should be 5VDC (~3W) like in standard USB-chargers.

Main task is to provide a shematic, BOM as well as transformer data.

The Circuit should be low cost and very compact so every part size/price matters but could be discussed at any time.

We looking for someone who has a professional background at designing power supplies and willing to discuss the best solution.

Skills: Electrical Engineering, Electronics

See more: 230vac to 5vdc converter circuit diagram, 220vac to 5vdc without transformer, 220v to 5v without transformer, 220v to 5v power supply circuit, 230vac to 5vdc without transformer, 230vac to 5vdc power supply, 230v to 5v power supply circuit without transformer, 220vac to 5vdc converter circuit, low cost power supply design, boost power supply design software, attiny power supply design, power supply design lm723, lm723 power supply design, 48v dc switching power supply design, pcb battery power supply design

About the Employer:
( 27 reviews ) Raubling, Germany

Project ID: #15241864

39 freelancers are bidding on average €187 for this job


Hello I am hardware engineer and PCB designer. I have big experience in SMPS designing. in addition to "provide a shematic, BOM as well as transformer data." I can suppose my help in PCB designing. we can di More

€100 EUR in 5 days
(113 Reviews)

Hi, I am a post graduate power electronics engineer and having very good industrial experience of 8+ years in R&D and project development. I am excellent welding power supplies design, high frequency transformers desi More

€444 EUR in 10 days
(54 Reviews)
€555 EUR in 10 days
(22 Reviews)

Hi I am interested to your project. I am familiar with electronics, PIC microcontroller, power supply as well as PCB design by Eagle. Thanks.

€1000 EUR in 30 days
(54 Reviews)
€155 EUR in 3 days
(24 Reviews)
€155 EUR in 3 days
(26 Reviews)
€200 EUR in 10 days
(19 Reviews)

Hi sir I have 5 year experience of electronic field I have done many projects using many cad tools I have done many power supply projects If you need more information about me please see my profile and portfolio Th More

€137 EUR in 7 days
(21 Reviews)

Hi sir, We have read your document and checked the pictures, we will design you the power supply based on SMT components so it will be well compact and professional. we can design you such board in Altium. Lets t More

€250 EUR in 3 days
(15 Reviews)

I will give you a schematic, PCB layout, gerber, BOM for your Power supply. I understand very well a specification or your Power supply. If you have any question, let me know. I will answer as soon.

€49 EUR in 3 days
(3 Reviews)
€200 EUR in 3 days
(4 Reviews)

Hello I am a Power electronics designer and I can design the compact power supply with the CE standards. I have done various power supply projects and low power systems. ping me for more details.

€90 EUR in 3 days
(4 Reviews)

A proposal has not yet been provided

€178 EUR in 15 days
(1 Review)

Hi, I’m Subodh Sarkar, a Graduate Electronics Engineer from IIT, Kharagpur, India. I have more than 30 years of experience in designing Electronic Circuits, PCB and Prototypes of Electronic Products. I am expert in More

€150 EUR in 10 days
(1 Review)

Hello, We have a team with 3 groups: System design, Layout PCB & Mechanical for matching more requests & schedule. We have +10 years experience of Developing custom electronics, Schematic Design, PCB Layout & 3D en More

€150 EUR in 2 days
(1 Review)

hi, I have just finished a SMPS, see my profile. Currently working on 25 watt SMPS. I can provide Schematics , PCB, BOM and calculations for the supply. I am confident that i can do it in a proper way. Last supply wa More

€111 EUR in 1 day
(4 Reviews)

Because i am from Shenzhen China. and i have best resource among the all bidder here. i can help you to supply all those requirments please pm me

€155 EUR in 3 days
(3 Reviews)

Thanks for sharing your requirements. From quick review of "OB2535", Universal AC input passed through Bridge rectifier, Cap-Indu combination then pulsating Xmer. IC works as a controlling device to get constant outpu More

€200 EUR in 6 days
(1 Review)

Hi, my name is Zeeshan. I would love the opportunity to assist you in making a compact and efficient power supply. I am MS Electrical Engineer and have over 3-years of experience in this domain. If you want to know mor More

€88 EUR in 5 days
(4 Reviews)

How r u?bro,,,Its me imad, Have done 200+ projects regarding arduino, matlab, .Net, vb, PIC, PCB designing, PHP and HTML. U will feel brotherhood,,,,,,, Relevant Skills and Experience Full monitoring and Control of More

€90 EUR in 3 days
(9 Reviews)