Title: Development of electrical schematics (EasyEDA) for data acquisition modules (STM32, precision ADC, galvanic isolation) Task Description: We are looking for an experienced circuit engineer to develop the schematic diagrams for two boards (PCB design is not required at this stage). What needs to be designed: Master module: power input of 24V and communication with the external world via hardware-isolated RS-485. Analog input module: digitization of two channels of industrial sensors (0-10V / 4-20mA). Based on a precision ADC (type ADS1248). A mandatory condition is the presence of an internal digital isolation barrier after the ADC. The boards communicate with each other via SPI. Key requirements (Strict!): Environment: only EasyEDA (Pro or Std). Components: 100% of parts must have part numbers (C-parts) from the LCSC Electronics catalog, as the boards will go for automated PCBA. Base MCU: STM32F103 (or your suggestions for modern equivalents). A detailed, well-written technical specification with a ready reference architecture from Texas Instruments will be provided to the candidate. Bonus: For the specialist who diligently and competently completes this stage (circuit design), a second paid stage — routing of these printed circuit boards (PCB Design) — will be guaranteed.
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Vladimir Dudchenko 24 August 2020Хотелось уточнить резка будет происходить на гильотине или лазерная ? Сможете погнуть с 4 сторон или нужно делать низ и верх отдельно ?
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Dmitry Lysenko
24 August 2020
Добрый день.
Резка лазером, но нужен оптимальный раскрой из листа 1,22 х 2,5
По гибке должен уточнить, но станок не ручной, а какой-то модный с ЧПУ
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Vladimir Dudchenko 24 August 2020
и уточните какими радиусами гибки он может гнуть.
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Dmitry Lysenko
24 August 2020
Это будет иметь важное значение?
Дело в том что порезку и гибку будет осуществлять сторонняя организация, наши пока только сварка и покраска, и нам бы не хотелось привязываться к конкретному оборудованию. Возможно в дальнейшем подрядчик поменяется.
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Dmitry Lysenko
24 August 2020
Может лучше сделать общий чертеж, а под конкретное оборудование пусть уже подгоняет исполнитель?
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Vladimir Dudchenko 24 August 2020
Можно и так. Как хотите но это все нужно оговорить с заказчиком. Просто при развертке нужно указывать радиус гиба чтоб посчитать размеры общей Может лучше сразу делать раскрой обечайки низ и верх который приваривается.
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Sergey Kushnir 27 August 2020ну, в таком случае - "общий чертёж" у вас уже есть
а под конкретное оборудование - подрядчик сделает чертежи
потому что - да, возможности оборудования имеют значение при проектировании.
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Sergey Golovko 25 August 2020Чертежи шкафов малогабаритных, приборных - не интересуют?
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