ESP8266 Automatic Turtle/Fish Feeder

thingiverse

Automatic Turtle/Fish Feeder That You Can 3D Print Yourself. The Automatic Turtle/Fish Feeder uses WeMos D1 mini (ESP8266) as its main board and features a food run out sensor. It can be powered either from USB or DC Jack (5V). ## Features * Telegram Bot with Out of Food Notifications * MQTT Client * Automatic Feeding Once a Day * Time Synchronized to NTP Server * OTA Updates * RGB Status LED ## Getting Started ### Parts * WeMos D1 mini (the one with mounting holes) * SG-90 Servo (or similar) * 12x12 Tactile Push Button (TC-1212T) and button cap * Standard 5.5x2.1mm Female DC Jack (I took out one from Arduino UNO) * 5mm Infrared LED (you can take one from old remote) * 5mm Infrared Photodiode * 5mm RGB LED with common cathode * 3x 220Ω Resistor * 100Ω Resistor * 2x 20mm M5 Hex Bolt * 2x M5 Washer (DIN 125) * 2x M5 Hex Nut * 4x Small Self-Tapping Screw (two for mount the servo, and two for mount the D1 mini) * 2x Small Silicone Washer (they often adding them to computer fans for silencing) * Some Wires (ex. from UTP cable) ### Tools Needed * Soldering Iron * Hot Glue Gun * Sandpaper * Cyanoacrylate Glue (ex. Super Glue) ### 3D Print Scale `spacer.stl` to the thickness of your aquarium wall (by default it's 5mm thick). All the parts you can print with standard PLA. #### Recommended Settings | Part | Infill | Supports | | ------------- |:--------:| ---------:| | `case.stl` | 30% | no | | `feeder.stl` | 25% | yes | | `hook.stl` | 25% | no | | `lid.stl` | 25% | optional | | `spacer.stl` | 25% | no | | `funnel.stl` | 100% | yes, see below| When slicing `funnel.stl` you must block generating supports near IR led and photodiode holes, like on the screenshot below.  To save some time and material, I suggest unticking "Use Towers" in support settings when using Cura. ### Assembly * Print all the parts * Solder wires to the IR LED and photodiode, about 8-10cm each * Solder 220Ω resistor to each anode of the RGB diode (longest leg is a cathode) * Attach the servo to the case using self-tapping screws * Place M5 hex nuts, push button, DC Jack and RGB LED inside desired holes for them * Secure the button using hot glue * Put the IR LED and photodiode cables through the side holes of the case. * Do all the wiring according to schematic below  * Secure RGB LED and DC Jack using hot glue * Secure WeMos using self-tapping screws * Attach `spacer.stl` and `hook.stl` to `case.stl` using bolts and washers. * Check if `funnel.stl` fits the `case.stl`, if not use sandpaper on the joints * Secure `feeder.stl` to the servo using cyanoacrylate glue * At this point, everything should look like this  _{^{Yeah, I know it looks quite messy}} * Attach carefully `funnel.stl` * Place the IR LED and photodiode inside their holes (they should hold inside them without any glue) * Upload firmware using USB cable and load it with turtle/fish food ### Firmware You can use [this firmware](https://github.com/kacpi2442/TurtleFeederFirmware) or write your own. Comment if you want me to add a link to your firmware here.