Design a cheap circuit - LED flash

The purpose is to create a simple PCB with the following characteristics:

1. the used components should be very cheap;

2. the circuit should be powered by a small battery, with enough capacity to be used for at least 4-5 months under the conditions mentioned below;

2. the shape containing the PCB will be round, with a diameter of maximum 3 cm and as flat as possible (to be integrated in a plastic package together with the battery);

3. the function of the circuit is: a) after the power on, it flashes a LED for a period of 3 months; b) after the 3 months period, the circuit flashes another LED with a different color, for an additional period of 1 month; c) after the new period of 1 month, the circuit flashes a 3rd LED with a different color and keeps flashing the LED until a RESET button is pushed.

4. the duration of the period when LEDs are switched off to be calculated and mentioned considering the point 2.

The package containing the circuit will be similar with the attached picture.

The winner should provide:


-list of components and characteristics;

-PCB layout;

-5 sample circuits.

Skills: Electrical Engineering, Electronics, Microcontroller, PCB Layout, Product Design

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About the Employer:
( 2 reviews ) Ramnicu Valcea, Romania

Project ID: #16626348

32 freelancers are bidding on average €163 for this job


Hello, We have a design team with 3 groups: System Design, Layout PCB & Mechanical. We have +15 years experience of Developing custom electronics, Hardware Design, Firmware & Software and +5 years experience of 3D More

€155 EUR in 3 days
(19 Reviews)

I have long experience with 8-bit micro-controllers in low power modes and I deliver neat , well documented code . I can design the PCB according to your dimension constraints .

€200 EUR in 5 days
(31 Reviews)
€155 EUR in 3 days
(22 Reviews)

A proposal has not yet been provided

€250 EUR in 10 days
(60 Reviews)

Hello there! Hope you doing good! If you still need this to be done, be sure to contact me. Lets make something awesome! Greetings!

€250 EUR in 30 days
(34 Reviews)

A proposal has not yet been provided

€200 EUR in 3 days
(40 Reviews)

Hi, I am a professional electrical engineer I know all about circuit, layout and PCB design on cadence mentor and synopsys and have all the required cad tools on my laptop I can finish your task quickly and efficiently More

€222 EUR in 7 days
(19 Reviews)

Considering the fact that you ll need these fabricated as well, the time was considered. The shipping of components will be as actual and not part of the bid. Question- what is the blink rate you are looking for? More

€222 EUR in 30 days
(10 Reviews)

Hello,sir. I interest to your project. I`m mastering PCB, circuit design, algorithm design. I hope to see you for our project. Thanks.

€144 EUR in 5 days
(30 Reviews)
€166 EUR in 5 days
(8 Reviews)

Hi. I can make your project. pls see my portfolio for electonic circuits and projects.

€34 EUR in 5 days
(9 Reviews)

How r u?buddy,,,if u award me this project,, i m very grateful to u,,,i have the ability to produce low cost pcb than china, U will feel brotherhood.............

€90 EUR in 3 days
(17 Reviews)

Salut ma numesc Mario puteti uita la portofoliul meu si calitatea lucrarilor mele...sper sa colaboram ! I would like to work on your project, I'm very proficient in this field with 8 years of experience, I never left More

€100 EUR in 3 days
(3 Reviews)

Hello sir, i read your requirement. I am able to do this job. But only one confusion there, if you want to use low budget component then you can not accomplish your goal of low power consumption of battery. There are More

€77 EUR in 3 days
(2 Reviews)

Hi, I already read the requirement doc. I think I can do it. I am expert in Circuilt Desgin/Pcb Layout/Micro controller program. I have more than 19 years experiences. Please contact me and discuss it, thanks. More

€250 EUR in 15 days
(8 Reviews)
€166 EUR in 3 days
(3 Reviews)

Hi. I have over 15 years of experience in PCB design. Some my last projects you can see in portfolio. Please see my profile for details. I can do schematic and PCB in Altium Designer with all required files for manu More

€190 EUR in 14 days
(2 Reviews)

Hello. I can do this project with 5 sample prototypes. PCB and schematic will be designed in Altium Designer. All files with working prototypes i will send you after assembly and testing. We can discuss more details ab More

€110 EUR in 14 days
(2 Reviews)
€155 EUR in 5 days
(1 Review)

Hi, We are a team of talented and experienced developers in PCB design. If you could contact us we can send you a quick draft. Please take a look at our profile. Hope to see you soon. Regards UZ

€200 EUR in 7 days
(1 Review)