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Simple circuit please for an adjustable flashing light which could be used as a crude metronome for band practice?

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Simple circuit please for an adjustable flashing light which could be used as a crude metronome for band practice?

hi, not looking for anythng fancy, in fact quite the opposite, would like something easy to build.  It only has to be time-stable over say 5 minutes say, i.e. one song (and NOT "sample-accurate!).  Don't need a digital readout, will adjust according to feel.  So need a circuit with a pot. I guess.  Doesn't need to power a big bulb, just as long as 6 people in a room can see it.  A LED would do if sufficiently bright - I'm not familiar with what's on the market these days.  Have dabbled with soldering iron in the past...  Thanks for reading.  P.S. The simple relay-based circuit might be ok if someone could suggest where to put a pot. and some values for Rs and Cs.  Don't want sound output.
asked Sep 3 by andrew1virginmedia-com (120 points)

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