High Precision Timer PCB

I need a circuit which contains a microcontroller and which has ten optocoupled inputs and a precision of 1ppm

Technical Data:

-Microchip or Atmel controller

-10 optocoupled inputs for normal switches

-Input voltage: 12 Volt

-RS232 Output

-1ppm precision with TCXO or something like this.

-2,54mm header for the connections (10 inputs, Power supply, RS232 signal)

-Header for flashing the microcontroller


-An precise interrupt should be generated when one input is switched

-Timestamp is generated and the following message is send through RS232: Number of input (1...9) / Timestamp

-The last input should be used to reset the timestamp to zero

-Timestamp is in milliseconds

Design should be made with Eagle or Kicad and the software code should be provided as well from you.

Skills: Microcontroller, PCB Design and Layout

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About the Employer:
( 1 review ) Stuttgart, Germany

Project ID: #23617012

18 freelancers are bidding on average €202 for this job


Hi, I hope you are doing well. I have expertise in Microcontroller projects. I have reviewed your requirements for Precise Timer System. I need to discuss my suggestion in chat. Please send me message for further di More

€550 EUR in 20 days
(62 Reviews)

Hello, I am Anthony from Sri lanka. I have 7 years of experience in the field of electronics. Currently I am working as a full time freelancer and I have state of the art electronic lab. Why you should h More

€140 EUR in 7 days
(41 Reviews)

Hello sir, I have experience in designing electronics circuits and can program all kinds of microcontrollers. You can discuss your project with me in chat and we can move on right away. Thank you.

€150 EUR in 10 days
(31 Reviews)

Hello. your requirement is clearly. I will use atmega and Eagle designer. I am also programmer. Regards.

€200 EUR in 7 days
(29 Reviews)

Hello. After reading over your project this looks like a perfect fit for my skill sets. I have 10+ years of Microcontroller and PCB experience. I have many experience uesd Microchip and Atmel recently. Please refer to More

€150 EUR in 7 days
(13 Reviews)

We are a team of Electrical and Electronics engineers and we are Excellent in the following areas: • Embedded C Programming. • VHDL/Verilog • Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC and STM32. • ID More

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€444 EUR in 10 days
(11 Reviews)

Dear Employer, I am an Electronics Engineer, programmer and a PCB designer. I can do this project. I already worked with RS232 in an Industrial project. I used timer for my many project. I can design professional PCB' More

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(14 Reviews)

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Вы хорошо описали техническое задание, в отличии от многих других. Этот проект меня заинтересовал. Relevant Skills and Experience Занимаюсь разработкой PCB и схем, цифровой и аналоговой электроникой. Программирую микр More

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I am an electrical engineer. I work in a team of electrical and electronics engineers. We have good experience in electronics design and microcontrollers, especially in Microchip and Atmel microcontrollers.

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(0 Reviews)

Hi Sir, I am an electrical engineering department student and I am interested in your project concerning a pcb + software for a board tells which switch is pressed through rs232 protocol, I read the discription well an More

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