电路设计 Jobs

Need a concept schematic which will have real-world use for an emergency shutoff button inside commercial freezers which sends alarms to public officers

I am looking for someone who can install a NEMA 14-50 outlet in my garage. My home's current electrical setup is 240V. The installation is not for an electric vehicle charger, but for another purpose. I would like the installation to be done in my garage. The ideal candidate should have experience in electrical installation and be knowledgeable about NEMA 14-50 outlets.

DC-DC Boost Converter Project I am looking for a freelancer who can design and build a DC-DC boost converter to meet the following requirements: Input Voltage Range: 18-36V Desired Output Voltage: 180V regulated; adjustable between 50-180V through a 10K pot. Required Output Current: 1A-5A Ideal Skills and Experience: - Experience designing and building DC-DC boost converters - Knowledge of power electronics and circuit design - Proficiency with simulation software (e.g. LTSpice, Simulink) - Familiarity with components and materials used in power electronics The completed project should include: - Schematic and PCB design files - Bill of materials - Test results and performance data If you have the skills and experience required for this project, please submit a proposal with your app...

Specific replies considering the project content will be preferred choosen! Task: From a previous project, we received a PCB design but unfortunately, it has some mistakes like the following. - line spacing not homogeneous and not with > 50µm spacing) - lines are not centered within the contact pad - lines are ending without being connected - solder stop layer not correctly applied => A few more modifications need to be done: please check the file "" and the description. I will provide the .dxf and the gerber data. => I expect the corrected .dxf and Gerber data back in and .BRD files within five working days after the project acceptance. Within the attached files, you can see the "misstakes" to be corrected.

I am looking for a skilled freelancer to assist me with my personal project involving Ltspice Electrical simulation. The goal of this project is to simulate a specific circuit, and I am looking for someone who has experience in troubleshooting and designing new circuits as well.

I need a consultant for a Solar micro inverter design with maximum power 750W , 1500W and 2000W ( multiple inputs with 250W per input). Detailed spec will be explained during discussion. Our company has electronics engineers so we need a consultant with solid experience in designing solar micro inverter. Please do not bid if you haven't done a successful micro inverter. Also I do not respond to generic bid messages. Please be specific with your Solar micro inverter experience. Start your bid message with "SOLMICINV" to make sure that you have read it fully

We would like to make some changes to our PCB. I will forward attachements and descriptions of changes to be made once we have made contact vie email.

i need pcb design of raspberry pi which includes schematic , layout , bill of material and gerbers .

I am looking for a professional to create a 3 phase auto starter for my motor, Using HOLTEK HT66F0021, I have shared ckt diagram for that I just need code . It should also have a feature for phase reversal protection, as well as an enclosure made of plastic. I am hoping to find someone who can deliver a reliable and effective product within the specified timeframe. I welcome any suggestions and advice from experts in the field and will be happy to discuss any additional requirements as necessary.

Hi! I'm looking for an experienced PCB design engineer to create a custom audio PCB design for a project I am working on. This project requires a large design (over 5 square inches) for audio processing purposes, with a focus on 5.1 decoding. The engineer should have extensive experience in PCB design and must be proficient in various aspects of the development process, including component selection, circuit analysis, prototyping, debugging, and validation. Knowledge of audio processing concepts, such as signal filtering, sound effects, and equalization, is essential. The chosen engineer will be required to implement the most cost-effective solution and create a product that meets all functional requirements. If you believe that you have the skills and knowledge necessary to complet...

I am in need of a skilled electrical/electronics engineer to design a circuit for my consumer electronics project. The ideal candidate will have experience in circuit design/ firmware development and be able to work quickly to meet my tight deadline of less than 1 week. Specifically, I need someone who has the following skills: - Circuit design/ MIcrocontrollers/ PCB - Ability to work quickly and efficiently - Experience with consumer electronics If you are an electrical/electronics engineer who meets these requirements, please submit your proposal. Thank you!

I am looking for a skilled professional who can build a PCB board for me. The purpose of the board is for power supply, and the preferred power input is AC voltage. The dimensions required for this project are large (greater than 10cm x 10cm). The ideal candidate for this job should have experience in designing and building PCB boards, and be knowledgeable about power supply and AC voltage. The project requires attention to detail and accuracy, with a focus on producing a high-quality PCB board that meets my specifications.

I am seeking a skilled Device Design Engineer to create a wire-heating device for my project. The device needs to be powered by a rechargeable Lithium-Ion battery designed to heat wire to a temperature below 100°F. The wire length is between 3-5 meters. I attempted to build a similar device using a steering wheel heating wire I purchased on eBay (0.03ohm) and a 4-cell 6V battery box, but it consistently overheats. Therefore, I seek an expert who can design a reliable and efficient solution. The ideal candidate should have experience in designing small and lightweight devices. The required voltage for the Lithium-Ion battery is yet to be determined, so your expertise in selecting the appropriate battery configuration will be valuable. Note: Any suggestions or alternative approaches t...

I am in need of an electrical engineer with experience in crypto mining power distribution. My current mining setup has a total power consumption of more than 5 kW and I am using ASIC miners. There are industry-specific regulations that need to be followed for this project. Ideal Skills and Experience: - Experience in designing and implementing power distribution systems for crypto mining setups - Knowledge of industry-specific regulations for electrical systems in crypto mining - Familiarity with ASIC miners and their power requirements - Proficient in creating electrical schematics and diagrams - Ability to work with contractors and suppliers to procure necessary equipment - Experience in troubleshooting and repairing electrical systems in a timely manner.

I am in need of a custom RF meter (100Mhz - 90 Ghz. , 20.000 sampling rate per second). Therefor looking for an electrical engineer (project manager). I am needing to build an RF meter that can outperform an ENV RD-10. RD-10 specs: RF Frequency range 100MHz to 8GHz RF measuring range -60dBm to +5dBm RF Typical accuracy ±6 dB I am in need of a meter that can go beyond 8Ghz. Preferably 100Mhz - 90 Ghz. The issue at hand. ''Professional equipment'', like Narda for example, for political reasons; work with a low sampling rate (mostly 5/second sampling rate). I am in need of a high sampling rate (20.000/second sampling rate). Price is open for discussion.

I am in need of a custom RF meter, but dont have any electrical skills. Therefor looking for an electrical engineer (project leader). Long story, in extremely short. I am needing to build an RF meter that can outperform an ENV RD-10. RD-10 specs: RF Frequency range 100MHz to 8GHz RF measuring range -60dBm to +5dBm RF Typical accuracy ±6 dB I am in need of a meter that can go beyond 8Ghz. Preferably 100Mhz - 90 Ghz. The issue at hand. ''Professional equipment'', like Narda for example, for political reasons; work with a low sampling rate (mostly 5/second sampling rate). I am in need of a high sampling rate (20.000/second sampling rate). Price is open for discussion. [Reposted due to freelancer error]

The project should pass by the followings steps : -Draw a general architecture of the module. -Components, ICs, controllers selection. -Draw the schematic based on what is needed as functions. -Simulate, and test… -Design the PCB in Multi-layers -Produce some samples to be tested with battery packs ( it is needed to know what kind of test should be done ) After achieving every step, it is needed to get our approval to pass to the next step. Below please find the main futures of the BMS we intend to develop : -Control of battery packs composed of 7 to 15 cells connected in series -Measurement of the voltage of each cell with resolutions of 1 mV; -Measurement of the current pack in charging and discharging with a resolution of 10mA; -Monitoring the temperature (2 channels) of the...

My team and I need help installing an SDR Communication System on an offroad military vehicle. This specialized system needs to be installed for a key search and rescue mission. The desired frequency range needed is VHF/UHF. We already have a specific brand/model in mind that we would like to be used but are open to recommendations. We look forward to hearing from experienced professionals with experience in the field. On urgent basis we need to tailor the proper documentations (Electrical drawings & BOQ) in max 24hrs after we agree so we can join the bid, the devices are listed in the attachments, car model is Toyota LC 79 series single cap. Requirement: Technical drawings for system integration with the car plus supervision over installation it self, and BOQ

We are seeking a highly skilled individual capable of effectively solving complex Electronics Circuit questions within a tight deadline. The following topics are of utmost importance for these questions: red ones rectifiers diode circuits Zener diode Fixed Base Bias Circuit Fixed Base Bias with emitter resistor (Emitter stabilized bias circuit) Voltage-Divider Bias Circuit AC analysis and DC analysis Operational amplifier If you possess expertise in these areas and have a proven track record of delivering accurate and timely solutions, we invite you to apply for this project. The successful candidate will be expected to demonstrate proficiency in tackling intricate Electronics Circuit problems and providing comprehensive solutions. Please note that a short deadline is involved, so the...

I am looking for a skilled and experienced freelancer to create a remote controlled hoverboard for transportation purposes. The hoverboard should have a long range and low speed capability. Additionally, I have specific design requirements that must be met. I have already purchased the Hoverboard and have two ESP32 to use as a remote control (I will need additional Parts) I have the whole build out of the requirements but need some assistance The Purpose of this project will be to carry roughly a 60lb load, and be powered and steered by the front two wheels of the hoverboard and the rear wheels will be caster wheels. i want to be able to wirelessly control it using the esp32 or other cheap methods. The github and everything is already done. Just need the help programming it and conn...

Circuit Designer Electronics Project

I am looking for a skilled senior hardware designer with at least 10 years design experience to review my current schematic for the NXP LS1046A processor. The main objective of this review is to identify any potential issues that may arise during production and to optimize performance. It is crucial that the design is compatible with other components in the system. Ideal skills and experience for the job include: - Strong knowledge of NXP LS series processors - Experience in hardware design review and troubleshooting - Familiarity with PCB layouts and schematic design - Attention to detail and ability to identify potential issues - Effective communication skills for collaboration with the client and other team members.

I am looking for freelancer who can design stereophonic player of audio stations available on internet. There will be 3 blocks in the audio player 1) Wi-fi receiver 2) processor to connect to URLs 3) stereo amplifier.

We have a schematic for a power supply design. We need the PCB designed in Eagle 7.5. BOM with package data will be shared. • Bid only if you have past experience in designing power supplies. • Design will have to consider EMI/EMC aspect for certification. • There are approx. 48-50 unique components and about 115 total. • PCB is double-layered. Size isn’t a criterion, just not too large - 150mm x 150mm (f.e.). • You can use generic libraries and open-source libraries. Please check the attached pdf for more details.

Using cst 1)Design a high efficiency reflector feed antenna based on the following reference with a 5% bandwidth. - Kishk, A.A.: 'Technical memorandum: Simple primary focus feeds for deep reflectors', IEE Proceedings H (Microwaves, Antennas and Propagation), 1989, 136, (2), p. 169-171, DOI: 10.1049/ip-h-2.1989.0030 a. Centered at 10 GHz à feed 1 And Design a reflector antenna using this feed design to produce 40 dB of gain at the center frequency. Plot efficiency curves, gain and radiation patterns. Finally 2)Design the most compact right-hand circular polarized patch antenna with the following specs: a. The axial ratio below 3 dB. b. The matching level is below -10 dB d. Operating from 20 GHz to 20.4 GHz over 40 mils thick RO3003 substrate e. Plot co and cx radiation ...