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Arduino Pro Micro
Cat feeder brain
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ESP8266
WiFi module for polling the cloud server for feeding times
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DC motor with crank arm
Drives the feeding piston
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AMS1117-3.3V step-down buck module
Dropping the input voltage to a friendly 3.3V level for the ESP8266
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3.3V zener diode
5V to 3.3V Level-shifting for the ESP8266 serial transmission
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330 ohm resistor
Part of the level-shifting circuit
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Piezo speaker
Plays a short melody when food is served to lure the cats in (and for a little Pavlovian experimenting).
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Pebble smartwatch
Feeding times can also be set with a simple pebble.js app.
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SN754410
Motor controller (actually a bit too flimsy for this purpose as a stuck motor will quickly burn the chip)
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