Circuit design for an Arduino UPS

Closed Posted Nov 19, 2014 Paid on delivery
Closed Paid on delivery

What I need is an electronic circuit design for a Arduino UPS. I want it to work like this:

1. It will be connected to an external power supply which provides 5V steady and 6A max.

2. It will use 3.7V Li-ion battery (1200 mAh) as power storage.

3. It will direct the current to Arduino when external power supply is on.

4. It will automatically and instantly switch to Li-ion battery when external power supply is off. I want the shield to provide steady 5V and 500 mA max.

I just want a circuit diagram. Not a specialized drawing for the production of the shield. I want the circuit to be composed of basic components such as resistors, capacitors, transistors, diodes, relay switches, only very commonly used and extremely cheap chips and such.

Also, it should charge the battery when external source is available.

It will nice to have 2 indicator LEDs which are green (external power supply is on and charging) and red (external power supply is off and running on Li-ion battery)

I don't have any battery management circuits in hand.

Please use affordable and commonly available chips instead of many basic components.

Please add a rough cost estimate for the circuit components of your probable design. Example: `I guess that I can design a circuit that will cost XY$ in total`

The cost should only include the components excluding Li-ion battery. I am not expecting a precise estimate here, just a rough guess (+-30% is OK)

Arduino Electronics

Project ID: #6756375

About the project

17 proposals Remote project Active Dec 26, 2014

17 freelancers are bidding on average $155 for this job

MikroStar

hi, i am an electrical engineer. i have expertise in embedded system design and Matlab.i can help you with this project. Please check my profile for my previous work experiences. let me know if you are interested in th More

$650 USD in 10 days
(48 Reviews)
7.5
Anthony989

Hello, I am Anthony and I am an Electronic Engineer who have five year experience in circuit designing and firmware developing. I am specialized in embedded system control and I am very familiar with popu More

$155 USD in 3 days
(55 Reviews)
6.5
EagleSha

I expect the BOM cost to be arounf 10 USD. Over 12 years of experience in electronics hardware and software design. Proficient in software and hardware design of embedded systems. Successful in planning and manage More

$55 USD in 5 days
(16 Reviews)
5.5
eried

Hello! This is something I want to do from long time ago, so I will put extra care selecting the best parts and testing them on a simulation ;) By the way there are some (maybe cheaper solutions), for example che More

$188 USD in 15 days
(16 Reviews)
5.0
delamoure

Hello. I have the similary unit done and tested in my devices. Chat me for more information. Best Regards Anton. p.s. Of course 1A charger used in this UPS.

$111 USD in 1 day
(11 Reviews)
5.1
gauravsharma132

We are new to freelancer, try to increase our clients for long term and healthy business relationship. We have followed our passion dedicatedly in embedded electronics for quite long time. "We Love What We Do." A More

$150 USD in 10 days
(23 Reviews)
5.0
RKearmey

Do you have any battery management circuits already in place? Do you need indicator lights? -Ryan Kearney

$155 USD in 3 days
(5 Reviews)
3.6
nadeemrizwan

hi, i am an electrical engineer and i have an experience in designing electronic circuits and microcontroller based embedded systems. i can design your project with efficient output response. I have also designed s More

$112 USD in 5 days
(5 Reviews)
3.4
Ktronics

HI Sir How are you ? I very interested with your project...My company can support you on Electronic design till manufacturing process. It would one stop center for electronic design to manufacturing. I looking More

$250 USD in 3 days
(1 Review)
2.4
aaelectronics

Dear Employer, I have read your requirement and am confident that I can design and prototype the circuit for you. Based on my experience, the UPS requires charging, DC to DC boost converter and an efficient power More

$250 USD in 4 days
(0 Reviews)
0.0
ankishsharma

A proposal has not yet been provided

$55 USD in 2 days
(0 Reviews)
0.0
ppmag

Hi, I have brilliant solution with minimal set of highly standard components. Apart cell, arduino and AC power,compontnts will cost - about $3-5 - retail price in online store (set for single pcb) - about $2 More

$95 USD in 7 days
(0 Reviews)
1.1
sammyshwairy

A proposal has not yet been provided

$111 USD in 3 days
(0 Reviews)
0.0
igortrefilov

Hello! The cost of you device is about 5-8$ for one piece. It's without a cost of PCB. All need LEDs will be on the board. The scheme I will do in Eagle.

$35 USD in 3 days
(0 Reviews)
0.0
Reulyka

Our company designs switched-mode power supply, a more complicated power supply. If what you need is a linear power supply then it will be much easier to design and I can guarantee it will be operational.

$35 USD in 3 days
(0 Reviews)
0.0