How do I make a small flashing led light that flashes avery 7 seconds. The board needs to be about the size of a silver dollar and could be powered by a watch battery.
- posted
17 years ago
How do I make a small flashing led light that flashes avery 7 seconds
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- posted
17 years ago
There's an LED flasher chip. If you live in the UK, they have (or had?) beginner magazines also.
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17 years ago
If it can be powered by 3 or more volts, a 74C14, one resistor, and one capacitor make a fine flasher. google for "schmitt trigger cmos oscillator". Use one gate for the oscillator, the other five in parallel to drive the LED.
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17 years ago
If you like software, you could use a PIC. (or any other tiny self-contained CPU)
Yes, that's way overkill for such a simple problem, but it doesn't require any external timing components and sometimes you can think of useful fancy things to do with the extra program memory.
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