[chbot] Come on all you retro engineerss!

Charles Manning manningc2 at actrix.gen.nz
Thu Jan 27 20:53:56 GMT 2011

555s... remember them?

Here's an opportunity to dust off your old skills and prove that your brain 
hasn't fully calcified.


My favourite 555-based device is by metal detector which uses 6 555s. These 
days you'd replace that all with a single 8-pin AVR.

-- Charles

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