Hi All,
I came across these "QTC pill" sensors which look interesting:
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You can buy them here:
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Actually the whole of the above site is worth exploring. They have carbon fibre, polymorph, acrylic and lots of other stuff at reasonable prices.Gordan McComb describes similar "home made" sensors to the "QTC pill" (in his book "robot builders bonanza"), using antistatic foam and aluminium foil.
Another interesting component is the Maxim MAX471. This is a chip for measuring current flow. You could use these to measure the current used by a servo. The harder the servo works (against a load) the more current it will take. Use one for each leg of a walker and you should be able to see how each leg is supporting the bot.
info on these is at:
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I also came across a site in the UK that sells the hamamatsu sensor used in the "laser target finder sensor" shown at:
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And my own work in progress is at:
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Regards Sergio Masci
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