Countdown timer for UV PCB exposure

September 15, 2007 | By admin In AVR Projects |
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If you need simple, reliable countdown timer for PCB exposure or even in the kitchen – this project is what you may need.

Countdown_timer.jpg

Circuit of this timer is very simple – AVR Attiny2313 microcontroller gets commands from three buttons (Time Up, Time down and Start), displays it on 2x16LCD. You can connect any device to be controlled to relay. After timer counting is over – it gives a sound signal via buzzer. Project schematic and PCB is developed with Eagle CAD software. Firmware is written in Basic language with Bascom. Time to cook.

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6 Comments so far

  1. coil on January 11th, 2009

    This link is bad it just leads to a spam website now

  2. coil on January 11th, 2009

    ps fix your buggy ass math proofer

  3. admin on January 12th, 2009

    Thanks for notice. Link removed. Couldn’t find a working link for this one – if you do so let us know.

  4. tibi on March 24th, 2009

    hi!
    how to download the bascom file?
    Or could you send by email?

  5. admin on March 24th, 2009

    It seems that site with files is gone. If someone find’s other place of files – please share here, or upload so they could be stored locally.
    Sorry for there inconveniences.

  6. dim on September 5th, 2009

    the project has moved to a new site: http://dselec.wordpress.com/timer/

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