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Build me a LCD countdown timer clock

I'm working on a prototype for a project and I need to source a circular LCD countdown display timer - see attached rough sketch.

The clock (timer) must only countdown days automatically, not hours, minutes or seconds, and be operated by a battery that you would normally see in a digital wrist watch or car key fob. It needs to be simple and basic in functionality. If I want to set the timer to countdown from 10 days then I push the + button until I get to 10 and if I leave it for 3 seconds it will set on this number. It only requires 3 digits so the max number of days is 999. Ideally, when the timer reaches 3 days the display changes color to yellow and when it reaches 0 days, red.

Size - it should be 1.5 inches diameter, 2 inches max, and as thin as possible.

It will need a thin plastic or rubber transparent cover to protect it from water but at the same time this should not impact its visibility or functionality of the +/- buttons. If this was not possible then I'm sure I could have this done at my end.

Evner: Elektrisk Ingeniørarbejde, Elektronik, Microcontroller

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Om arbejdsgiveren:
( 0 bedømmelser ) Dublin, Ireland

Projekt ID: #19645779

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Dear sir I have more than 10 years experience in embedded systems design, i can make the required display using small size OLED display or any other LCD display you would like to propose, please message me so that we Flere

€155 EUR in 3 dage
(232 bedømmelser)

3 freelancere byder i gennemsnit €140 på dette job


I am Excellent at the following:  Embedded C Programming.  VHDL/Verilog  Microcontroller like Arduino,RaspberryPi,FPGA, AVR, PIC and STM32.  IDEs like Keil MDK V5, ATmel studio and MPLab XC8.  IOT Technolog Flere

€155 EUR in 3 dage
(23 bedømmelser)

Hello Sir I get your requirement and I read it carefully Depending on my expedience I'll be a great fit for your project you can check my profile for more about my projects and circuits So I can do it complet Flere

€111 EUR in 5 dage
(12 bedømmelser)