This is a versatile LED or filament bulb flashing kit. As we shall see the user can add almost any number of LEDs they want to from 1 up to about 160. It was first published in the UK magazine Everyday Practical Electronics in December, 2002. We have modified the design to use a ULN2803A chip instead of all the transistor/resistor combinations which allows not only for quicker construction but even more LEDs than the original design. The PIC code is the code as supplied on the EPE website.
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