About life, robots and cats!
summary
A DIY pet feeder named Sasha uses a Raspberry Pi, Johnny 5 and RasPiO with NodeJS to dispense two servings a day for two cats, solving cost and space constraints by driving multiple servos from one dispenser. Problems include choosing the correct servo type and PWM pin limits, a broken npm timer that released food every hour, and tuning continuous-rotation behavior; an email-trigger feature gets added and the system ends up reliably feeding the cats.
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