• ¥500元 Auto Tuning Ultrasonic Sealing System

    状态: 未托管 关注: 截止交稿时间: 2018-06-25

    fr(中文版)

    We are developing a machine to seal lami & plastic tube using auto tuning ultrasonic tube sealing. We are looking for a person with previous experience in developing the same.

    The project would include the full system technology to be transferred for us to develop it.

    Requirements would need the following:

    1) Schematic, Gerber, BOM files of the PCBA

    2) Autocad drawings of all mechanical parts

    3) Firmware for PCBA

    技能: 电路设计, 电機工程, 电子, 机电一体化, 印制板布局

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  • ¥21元 electrical engineering report writer needed on microcontrollers

    状态: 未托管 关注: 截止交稿时间: 2018-06-24

    fr(中文版)

    Expert in electrical engineering reports needed

    技能: 电路设计, 电機工程, 电子, 工程, 印制板布局

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  • ¥140元 not sure but think building RISC in program called logisim

    状态: 未托管 关注: 截止交稿时间: 2018-06-24

    fr(中文版)

    sorry I have no idea about this project so please read the file in the attachment

    技能: 电路设计, 电機工程, 电子, 微控制器, Verilog / VHDL

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  • ¥500元 Boost converter and power charging module design

    状态: 未托管 关注: 截止交稿时间: 2018-06-23

    fr(中文版)

    Required is a boost converter & battery charging circuit design. Fabrication of the module is not required.

    Subject to the specifications below, required for delivery is:

    - circuit board BOM (incl manufacturer part numbers)

    - design files (preferably EasyEDA, but Kicad, Eagle or Altium OK)

    - detailed description of circuit operation

    Specifications:

    - 2.7-5v input

    - 12v, 1A output

    - 2.5cm/1" ^2 or less

    - 1A charging with under/over protection & low voltage cutoff

    - SMD parts US$2.50 or less at volume (1,000)

    技能: 电路设计, 电機工程, 电子, 印制板布局, 产品设计

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  • ¥250元 (Power Supply) ACDC Converter design on commercial level

    状态: 未托管 关注: 截止交稿时间: 2018-06-23

    fr(中文版)

    Hi there!

    I need an experienced employee who worked before in a power supply manufacturer company as R&D (designer) to design for me a full series of (Power Supply) AC-DC Converter. The designs needs to fulfill the international standards and should be implementable on commercial level.

    The prices below are just for one design. We will need many designs if the first one works well.

    Abdallah Hedaya

    技能: 电路设计, 电機工程, 电子, 印制板布局, 产品设计

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  • ¥135元 PCB ReDesign

    状态: 未托管 关注: 截止交稿时间: 2018-06-22

    fr(中文版)

    I have a tested PCB design, I simply need the design to be more space efficient.

    It drops the DC voltage from a battery network down to a lower voltage and uses an external 12VDC signal to trigger a relay to fire the shunt coil on an MCCB using the battery voltage as it's supply.

    The OHM and wattage of the resistors mounted externally can be selected to allow the PCB to work with different impedance shunt coils and different input voltages.

    I want to keep the components the same, just optimise the space use of the design.

    The PCB has to handle DC Voltages up to 800VDC + to - and 400VDC to Ground. This will need to be considered when advising what PCB Type and thickness to use and also the position of the PCB tracks.

    I want the connectors to be in the same places, however, I need the PCB to be as narrow as possible, the length as it is now is ok.

    We use a PCB mill in house to build the prototypes so the design needs to be able to be milled on a PCB mill.

    All the designs have be done in DesignSpark PCB. I will make these files available to the project winner.

    技能: 电路设计, 电機工程, 电子, 微控制器, 印制板布局

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  • ¥140元 arduino project

    状态: 未托管 关注: 截止交稿时间: 2018-06-22

    fr(中文版)

    My project is to use an arduino circuit like ATMEGA328P Pro Mini 328 Mini and a SIM 800L gprs GSM circuit board, prefered board to be smallest possible or ( if you can recommend better module for this project is fine let me know) conected to a the main alarm control panel and whenever there is an alarm this module call and send a text massage to the customers mobile number. So you need to write a program for the arduino to register the customer mobile number upto 5 numbers through sms ( numbered entered by sending text to the arduino) And also by sending a text massage customer can check the numberes which added and can delete them if want to. And by a receiving a text massage can get the sim card signal strengh and information if enquired. The arduino is activated by recieving negative 12v supply on one of its input. (Alarm activated) Another input should show the status of the alarm of it is set or unset.( negative applied is SET or negative removed is UNSET) send a text massage for each state. One of the arduino output is switched on and off by sending a text masage (pulsed) This is the basic purpose of the projects which the board is supplied from the 12v alarm supply so a small power circuit i needed to lower the voltage and supply the arduino. Please let me know if you are able to program and design the circuit for this purpose i may need one or two more function from the arduino input,output controlled by sms. Looking forward to hear from you. Thanks

    技能: Arduino, C 编程, C++编程, 电路设计, 软件构架

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  • ¥19元 build electronic system

    状态: 未托管 关注: 截止交稿时间: 2018-06-22

    fr(中文版)

    we are looking for freelancer for build electronic system HW\SW

    description will be delivered in conversation in PV

    技能: 电路设计, 电子

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