Amethyst AUV Components List

While Amethyst is universal platform which can be extensively customised, there are some accessories which are virtually integrated in to the design by their exact proportions. Its brushless motor, servo, o-rings and 26650 Li-Ion batteries. These four exact parts you should buy to start your build upon open source files. Special part is acrylic tube, wich can be from other materials or even 3D printed, but exact dimensions of tube are must be respected. Other accessories at this page are optional. Use of those parts depending exclusively on your goals, preference, budget or creativity, but if you use them, you are sure they will work together with Amethyst concept.

List updated: 1. 6. 2019

Basic setup essentials

    • Amethyst AUV Brushless Motor
    • Brushless Motor

      Amethyst AUV Platform now using these cheapest Chinese motors. There are plenty of producers out there and unfortunately not all of the motors are then identical - in therms of diameters and quality of wiring. Here is one of proven sellers at AliExpress providing these motors with good price and quality guaranteed. link

    • Amethyst AUV Servo
    • Servo

      This is most common and most cheapest servo you can find. We use them for dive planes and rudder. Their quality and power of 9g is just ok.

    • Amethyst AUV Batteries
    • 26650 Li-Ion Batteries

      Amethyst has two battery packs wit 3 battery cells each. You need etleast 6 of this type then.

      Type of battery is essential, capacity and brand is up to your preferences.

    • Amethyst AUV O-rings
    • 70x3 O-Rings

      Used to water tight dry compartment. For one acrylic tube 4 o-rings are needed.

      Use internet to find your local vendor

    • Amethyst AUV O-rings
    • 60x2 O-Rings

      Used to water tight battery packs. For one pack one o-ring is needed. Amethyst has at least two packs so two o-rings are minimum.

      Use internet to find your local vendor

    • Amethyst AUV Tube
    • Acrylic or aluminium tube

      Dimension of 200x90x(84inner) mm. Acrylic is beter for use with internal camera. Aluminium will allow greater depths.

      Use internet to find your local vendor

Basic setup Arduino based modules

    • Amethyst AUV Compass
    • Digital Compass - HMC5883L

      I2C Digital compass standart.

    • Amethyst AUV Depth Sensor
    • Water tight preasure sensor - MS5540C

      Depth sensor

    • Amethyst AUV Voltage Sensor
    • AMP 2.8 Power Module with 5.3 DC BEC

      Used for Pixhawk controller by fly drones. Amethyst use this as voltage and current sensor.

    • Amethyst AUV Radio
    • 433Mhz HC-12 Sl4463 Radio

      Wireless serial communication between Amethyst AUV and remote controller.

    • Amethyst AUV Antenna
    • 433Mhz Antenna RF SMA - U.FL

      Extenal antenna for HC-12 radio module. They are in various shapes and in various lenghts. Should be exactly 433Mhz. Take those with U.FL female connector on "pigtail" cable. Check guide here.

    • Amethyst Power Hub
    • Power Distribution Board

      With BEC 5V & 12V.

    • Amethyst AUV GPS Module
    • NEO-6M GPS Module

      With connector for external active antenna - important!

    • Amethyst AUV GPS Antenna
    • 3M Car GPS Active Antenna

      With SMA connector. Check the connector type to fit counterpart on GPS module.

    • Amethyst AUV Ultrasonic Sensor
    • JSN-SR04T Waterproof Ultrasonic Sensor

      Car spare part with serial connection. It come as set of sensor and board.

    • Amethyst AUV ESC Speed Controller
    • BlHeli-S type ESC

      Speed controller. Lots of brands produce them. Check before buy if its able to be programmed to spin brushless motor in both directions. 20A type is enought.