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Count down timer for UV PCB exposure boxes using PIC16F877 microcontrollerMay 2, 2012

kentar.net63.net writes:

This device is a countdown timer specially designed for PCB exposure box.You can set how many minutes will be on UV light device , store this time in PIC’s EEPROM . Pressing start button lights are on until preset time ends. When lights are off an audible signal is heard. Microcontroller used is Microchip’s PIC 16F877. I used Mikroelektronika Mikropascal compiler to program the chip. Delay time 1-255 minutes.

To know how to migrate from 16F877 to 16F877A chips, read the following doc.

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Via: Electronics-lab, Source: Kentar

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