• ¥140元 Single phase grid tie power inverterter

    状态: 未托管 关注: 截止交稿时间: 2019-01-26

    fr(中文版)

    I am looking for a designer to design an inverter with the following characteristics:

    - Single phase

    - Bidirectional

    - Grid tied

    - High voltage dc input ( around 300-450) to 230v 50hz ac (power around 500w)

    - Efficiency is the top priority. Component costs is not a limit.

    - It must use stm32 cortex-m mcu. Programing is not needed

    What I need:

    - Schematic and layout in Altium designer

    - BOM

    技能: 电路设计, 电機工程, 电子, 印制板布局

    查看更多: perl single phase digital meter circuit, single phase induction motor, single phase induction motor speed control, single phase induction motor mosfet, single phase inverter pcb, grid tie inverter schematic, speed control single phase induction motor using, single phase inverter design, single phase motor speed control, single phase inverter orcad, control single phase induction motor, single phase sine wave inverter, single phase sine wave inverter microcontroller, single phase sine wave inverter design, single phase inverter layout, grid hybrid power simulink simulation, simulink model single phase active power filter, grid tie power inverter circuit, grid tie power inverter schematic

  • ¥11元 Looking for LongTerm Electronics Engineer to answer questions

    状态: 未托管 关注: 截止交稿时间: 2019-01-26

    fr(中文版)

    Hi all,

    I'm looking for a electronics engineer to answer questions that I have on projects that I am completing on a case by case basis. I'm looking for someone who can respond in a reasonable time and is able to answer a broad array of questions. I'll be looking to hire on a per 1 / 5 / 10 / 15 / 30 minute basis, depending on what the prefer of the engineer is.

    All the best,

    Trent

    技能: 电路设计, 电機工程, 电子, 工程, 机械工程

    查看更多: cartoon character (looking for long term, cartoon character looking for long term, d imaging - looking for a good long term designer, d imaging looking for a good long term designer, i m looking for a web to answer my engineer hw, illustrate something looking for long term, looking for freelance arduino electronics engineer, electronics engineer interview questions and answers pdf, interview questions for electronics engineer, interview questions for electronics engineer in lec, looking for a bi lingual english hungarian speaker for long term freelance cooperation with the newsletters department of pmr, looking for electronics engineer and design, looking for ui developer bay area ca for a long term contract position, we are looking for a php angularjs developer for a long term position, long answer questions, We\ re looking for a visual designer to work with on a long term basis for this project and many others. , We\ re looking for a visual designer to work with on a long term , We\ re looking for a visual designer to work with on a long term basis for this project and many others. This contest is somethi, professional engineer required for a long term engagement, professional engineer required for a long term engageme

  • ¥20元 Hire an Electrical Engineer for a small task

    状态: 未托管 关注: 截止交稿时间: 2019-01-26

    fr(中文版)

    I need to Extract the ACM parameters of NMOS in Cadence. i have all the specifications needed for this task. please get in touch with me for further details

    技能: 电路设计, 电機工程, 电子, 工程, 印制板布局

    查看更多: hire electrical engineer sg, hire electrical engineer, i need a crestron engineer for small project, i need an electrical engineer to build, i need an electrical engineer, i need electrical engineer employment, i need to hire a computer chip engineer, i need to hire a electrical engineer indiana, i need to hire an automotive engineer in south florida, i need to hire an electrical engineer for a small job in houston, i need an electrical engineer nz, i need an international job advertising for doctors needed in south africa, dubai company who hire electrical engineer, hire electrical engineer freelance, hire electrical engineer mumbai, i need an advise about electrical engineer, i need state of america electrical engineer supervisor jobs, i need to hire an electrical engineer, i need to hire an electrical enginner short term, i would like to hire electrical engineer

  • ¥140元 Looking for an electronics engineer who lives in India

    状态: 未托管 关注: 截止交稿时间: 2019-01-26

    fr(中文版)

    Find out why MAX20331 High-Voltage Protection 3.5mm Audio Line OVP IC is important in India market.

    Rumor says MAX20331 was designed for India mobile market because there's a chance that high voltage can get into mobile phones's 3.5mm headphone jack. Why this case happens in India but not in other countries like USA?

    Is it because there's a similar looking jack on their cars/trucks/scooters that people can plug into the wrong hole by mistake?

    Please help me investigate and find out the reason, provide detailed use scenario with photos.

    I want to know why every cell phone selling in India wants a MAX20331 inside to protect the 3.5mm headphone jack, but cell phones selling to other countries don't need this IC?

    技能: 电路设计, 电機工程, Electronic Design, 电子

    查看更多: alpha electronics engineer, looking altium engineer, freelance wireless engineer matlab india, pro engineer certificate india, environmental engineer looking for job in india, find an electronics engineer, find electronics engineer, how to find an engineer in india to design electronic controls, looking for freelance arduino electronics engineer, looking to hire an engineer from india, can an electronics engineer find job in italy, find an engineer in india, find electronics engineer freelancer jobs, find work as an electronics engineer online, german company looking engineer for india, looking for electronics engineer and design, where can i find an electronics engineer, where i can find hardware integration engineer in india, how to find an electronics engineer, freelance electronics engineer india

  • ¥20元 Analog circuit analysis and description

    状态: 未托管 关注: 截止交稿时间: 2019-01-26

    fr(中文版)

    We have an existing circuit that is an H-bridge for controlling a thermoelectric cooler. It works and is controlled by software as far as the control algorithm, but this circuit has two resistors that set the heating and cooling current limits. We want to change these fixed resistors to trimpots, so that the heat and cool current limits can be adjusted. We also need to know the relationship between the voltage at the opamp side of these current limit resistors, and the current limit, so that when we dial up the current limits by adjusting the trimpots we can measure what the current limits are that we are setting.

    Attached is a schematic of this circuit. We feed in the voltage from a DAC (0-3.3V), and this is multiplied by x7 by U1B. The output of U1B determines which MOSFET pair in the H-bridge fires to heat, or cool. If the voltage out of U1B is less than Vtec (input at J4 over a range of 5 - 20V), then the system cools. If this voltage is greater than Vtec the system heats. We monitor the load thermistor as well as Vtec with our microcontroller and run the control algorithm.

    The cooling limit resistor is R6 (fixed at 20K now) and the heating current limit is R8 (fixed at 15K now so the the heating limit is somewhat less than the cooling limit). With these values, the maximum current is equal to Vtec/4, and we want to know why that is the case, and how R6 and R8 determine this.

    All of this works, and we only want to change R6 and R8 to trimpots, and know the relationships between their values and the heat/cool current limits. Also, we need to know the relationship between the voltage at the opamp sides of R6 and R8, and the cool and heat current limits so that we can measure the current limits as we adjust R6 and R8 (after changing these to trimpots).

    技能: 电路设计, 电機工程, 电子, 微控制器, 印制板布局

    查看更多: freeware version multisim circuit analysis, analog circuit simulator, freelance circuit analysis, worst case circuit analysis, circuit analysis project, circuit analysis works, audio digital analog circuit schematic, circuit analysis mathcad, multisim files circuit analysis, rss worst case circuit analysis, worst case circuit analysis services, multisim circuit analysis software, multisim circuit analysis, draw circuit analysis problems, assignment circuit analysis, circuit analysis problems, ac circuit analysis report, analog circuit projects outsourcing