python gpiozero - Accumulated Countdown timer on ZERO raspberry pi W with 4 digits 7 segments displays.

Hi There, I can do it very quickly & effectively. I'm having more than 9 years of web development experience. Looking forward to work with you! Thanks!

Hello, I am Anthony from Sri lanka. I have 7 years of experience in the filed and I am very much interested in your project. Why you should hire me ? * As a full time freelancer I have my own PCB fabrication work shop and testing lab. So there is no problem doing live tests with you after the device has been developed. * My workshop is equipped with CNC machine, FDM 3D printer and DLP 3D printer. So there is no problem designing and printing plastic parts you required. Please contact me if you are interested. Thank you Anthony

Hello! I have briefly read the description on python-gpiozero-accumulated-countdown development project, and I can deliver as per the requirements however I need us to discuss for more clarity on the details, deadline and budget as well. I reach out to see whether the opportunity is still available. If the job’s no longer available, I’d appreciate you throwing my hat into the ring for any similar opportunities in the future. Thank you for your time, I look forward to hearing from you soon, Best Wishes, Kevin M.

Hi, In this project from your description what iahve understood is there will be two sets of 4 seven segment display (small and big)(?) There will be two modes clock and countdown timer. For clock mode I will write scripts for countdown and display the count down to the seven segment displays accordingly along with the total time of countdown. both will be on real time while running. the connection will be based on the 7seg. you use. I and use any of the standard displays. for this can use the gpiozero library to access the pins. as we cannot have 4*7*2 pins to control the display I will use multiplexing to reduce the pin nos.(based on the display you use. if it is not there I can make one for you). Also to take the inputs the buttons will be directly connected to GPIO and used using gpiozero library. You have not mentioned much about the clock mode. RPIs dont have any inbuilt real time clock. are you going to use one externally? For more details please ask in the chat. Thank you.

Dear Sir, I would like to present my self as prospective candidate to do your project. I have sound knowledge and experiences in Raspberry Pi programming using Python and C languages. And also digital circuit designing. Your project need all those knowledge to make it a success. Regarding your project, following are my proposed design. As you prefer 7 segment displays, and according to your description you will be needing 3 number of 4 digit 7 segment units. to drive all 12 digits directly you will need 84 pins. However raspberry pi only have 25 pins . Therefore I have 2 proposals (Actually 3). Fist proposal is to use 74373 Latch chip for each 7 seg. display to memorize each digit values. Also to latch each digit value you will be needing CD4514, 4 bit to 16 line multiplexer. also you could connect latch pins to Raspberry Pi directly as RPi has plenty of pins available. This method give out much clear 7 seg display. Second proposal is to run Displays as matrix. This method need no external components. but intensity of display will be low due to flicking. The programming and testing time is around 2 days after making circuit boards according to my schematic diagram. My third proposal is to use a computer display to show 7 seg counting. A GUI could be write using QT for Python. Please message me if you have any question, Expecting a favorable reply, I remain. Thank you...

Hey, I have worked on this type of project. I am new to freelancer and so I am doing project at low cost.

Hello, I can help you. I have the necessary components to implement it and show you the working code. I look forward to working with you.

i am embedded system engineer and android developper my last projects was wheelchair(raspberry pi) connected to android app and i have developed projects with 7 segments like smart traffic i will deliver the project in the deadline contact me to start work from now if you want