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Development of a User-Friendly Sonar Depth Meter Project Description I am looking for an experienced electronics engineer/programmer to design and implement a sonar depth meter based on ultrasonic technology. The key requirement is the simplicity of operation on a "plug and play" basis (similar to the JSN-SR04T sensor) - without the need for complicated calibration by the end user. Scope of Work Electronic Circuit Design, including: Ultrasonic signal generator Transmitter driver for transducer control Receiver path with appropriate filter and signal detection circuit Control unit based on a microcontroller (STM32 suggested, but not mandatory) Temperature sensor for automatic sound velocity compensation User interface with LCD display and rotary encoder Factory pre-calibration of the system PCB Design, Production and Testing Electrical schematic in preferred format PCB layout design Component assembly Microcontroller Programming, including: Depth measurement algorithm with automatic temperature compensation Simple user menu without the need for technical configuration Automatic correction and filtering of measurements for greater stability Auto-calibration system at startup Waterproof Enclosure Development: Design and production of an enclosure with min. IP67 rating Installation of the piezoelectric transducer with waterproof sealing Technical Documentation: Detailed schematic diagram Bill of Materials (BOM) Simple user manual (plug and play) Source code with comments Technical Specifications Operating principle: plug and play Measurement range: 0.5 - 50 meters depth Measurement accuracy: ±10 cm or better Automatic temperature compensation in the range of 0-30°C Waterproof rating: minimum IP67 Power supply: constant 16V (power supply circuit is already designed) User interface: 16×2 LCD display with I2C interface, rotary encoder with button No need for manual calibration by the user Notes on the Piezoelectric Transducer The piezoelectric transducer can be: 200 kHz frequency Dual frequency 200/83 kHz Other frequency as recommended by the freelancer The choice of transducer and its driving technology is left to the discretion of the developer, depending on their experience and ability to achieve the best measurement results. Required Skills and Experience Experience in designing analog and digital electronic circuits Experience in microcontroller programming Experience in PCB design Ability to create intuitive user interfaces Knowledge of working principles with piezoelectric transducers and ultrasound Experience in creating waterproof devices Experience in designing "plug and play" devices Expected Results Complete sonar depth meter project, including: Full electrical schematic PCB design ready for production Working prototype meeting specifications Software providing "plug and play" operation Complete project documentation Testing of the device in real conditions Demonstration of operation and usage instruction Budget Project budget: [negotiable, depending on experience and scope of work] Interested parties please send a portfolio with examples of similar "plug and play" electronic projects and an initial project estimate.
Project ID: 39216083
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Active 3 mos ago
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Mikołów, Poland
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