Electronic Count Down Timer with LED Segments

I need a simple cound down timer design.

It will consist of 5 + 2 + 2 +2 digits. DDDDD HH MM SS

See a simple mockup around it in attached picture.

* Design around Atmega328P processor (arduino compatible)

* Cheap simple 8 char LED segment. 20-30mm high. Choose the simplest and cheapest

* Built in RTC with backup battery, so time and counter does not reset when main power is removed

* 2-3 buttom 90 faced upwards to set time and handle the menu

* Function will be. Set current time and date, set the count down time in year and days. After set, counter will correct it

to days in total and then start counting down showing DDDDD HH MM SS.

* USB mini on the side for main power.

* Function to dim the led segmentw from very weak to very bright.

* PCB design in Eagle [url removed, login to view]

After completed project I get pcb design, component and software files.

I want you to test this and really guarantee it works before we finished our project.

Suggest we have a open chat with Q&A during the project.

Project duration 3-4weeks

Compétences : Arduino, Génie Électrique, Electronique, Design de produits, Développement de logiciel

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Concernant l'employeur :
( 10 commentaires ) LINKÖPING, Sweden

Nº du projet : #13079914

Décerné à:


Hello dear I have experience in designing electronics circuits and can make your project. I will make your project practically on breadboard and will provide you circuit, code and PCB design along with gerber files. I Plus

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34 freelance font une offre moyenne de kr3413 pour ce travail


Hi Sir I am an expert electronics engineer with more than 8 years of experience in development of embedded systems I have read the details and I am sure I can do it for you Please review my profile and see the revie Plus

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Whatsapp: +92 321 6624970 I am an Electrical Engineer having specialization in Electronics and Control, teaching at Electrical Department FAST National University Pakistan. I am also persuing my MS degree in Electr Plus

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Hello, Good Morning. We will design and prototype the required hardware. Please feel free to contact us. Best Regards, Shahbaz.

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Hello Dear, We are a team of experts with a cumulative experience of more than 50 years in the field of embedded systems and prototype development. I assure you the best solution for your work. Regards Ch

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Hello, i have a 50-60% equal project that work, so i can use knowledge. Here are my proposals: My name is Vladimir. I've been worked in Olimex LTD for 3 years ([url removed, login to view]). I have a big experience in prototyping sc Plus

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Hiya. Nice project, a bit low budget. Definitely wrong part selection. I'd suggest using a cheap STM32F103, which has hardware RTC + battery backup, making parts list for this project basically just the MCU + po Plus

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Hello. Do you want to have this device fully Arduino-compatible? (So USB connector will be used for uploading of the code) Or you will use external programmator, and the USB used for the power lines only? I can Plus

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Hello. Im designing different electronics devices, mostly based on avr, arm MCUs and boards with them like arduino, stm-discovery etc. (autopromotion^)) What is "arduino compatible"? Do you want to use arduino boa Plus

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Hello I'll guide you and give you full help in all things in building your prototype from designing to manufacturing. I am Electrical Engineer and interested in your project. Please tell me about your time limits. Plus

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Hi Sir, We have read your project, we are professional circuit designers and PCB designers. We can do it for you. We do our projects with full quality assurance We offer our services at very feasible rates. Pl Plus

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dear Sir i can do this project. I can assure you that if you work with me once, you will always work with me for these kind of projects.

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hello,I am an electronics and communication engineer. I have good experience of embedded systems and PCB Design. I can Write the codes for functioning and test the systems in my place. design the PCB and send to you th Plus

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Hi Sir, I am interested and would like to do it. Thank you.

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