2 Digit Count Down Timer is a utility Count Down timer project for upto 99 seconds of countdown time. This project can find many uses in your shack and home. The relay output remains on during the Count Down period, allowing you to interface load or alarm that you want to keep it on for a certain amount of time (in seconds).
Microcontroller based design for greater accuracy and control
Power supply input 12 VDC 200 mA
Two 0.5″ display segments to display time
12V SPDT (Single Pole Double Throw) relay for alarm use
Single key start and dual key alarm time set function
Power and Relay-On LED indicator
Terminal connectors for connecting power supply input and relay output to the PCB
Onboard regulator for regulated supply to the kit
Crystal resonator based design for better accuracy
Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)
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