"JS" <bos### [at] yahoocouk> wrote in message 
news:web.46fc4425260418cdb6429ee0@news.povray.org...
> Sorry, no picture, I'll try again...
>
Lots of fun things you can do with a 555 (or 556)
See 
http://www.kingcharlesschool.co.uk/admin/files/Public/Departments/5/Downloads/555TIMER.pdf

Some years ago I built a 555-based metronome.
The biggest problem was making a properly calibrated dial for a rotary pot.


DLM

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