Sine wave inverter circuit pcb design jobs
I'm in need of a freelancer who can provide me with an accurate and simple industrial machine wiring diagram. It's crucial that you have an in-depth understanding of electrical circuits and wiring systems for industrial machines. Responsibilities: - Prepare a wiring diagram for a simple machine circuit. - Make sure the diagram is easy to understand without oversimplifying the essential elements. Required Skills and Experience: - A strong background in electrical engineering. - Extensive experience creating wiring diagrams, preferably for industrial machines. - Solid understanding of machine simplistic circuits. - Attention to detail, accuracy and consistency in diagram creation. - Excellent communication skills to clarify any ambiguous points.
The project is to create Inverter automation to start export, stop export and charge the battery automatically using a microcontroller that can subscribe to the server to get spot prices to run the automation. Objectives: 1. Modbus read and write 2. ESP32 Webserver 3. Spot price subscribe 4. Calculation / rules 5. MQTT Service (Server) 6. Price Service (Server) 7. Device Dashboard (Server) Project scope and system architecture are referred to the project brief documentation "Inverter Automation Project "
I'm looking for a skilled professional in Proteus and KiCad to assist with an electronic simulation and PCB design project. - I require assistance primarily with circuit design, schematic capture, and component selection and placement. - I already have specific electronic components in mind for this project, so I would need your expertise in helping me integrate these into the design. - The primary purpose of the electronic device I'm designing is for control and automation. Ideal Skills and Experience: - Proficiency in Proteus for electronic simulation - Proficiency in KiCad for PCB design - Experience with circuit design, schematic capture, and component selection and placement - Previous projects focusing on co...
...an industrial setting. Key Job Responsibilities and Deliverables: - Design and develop an IoT device capable of monitoring, controlling and analyzing energy consumption and environmental management for an entire property. - Implement IoT solutions with MQTT, AWS, LoRaWan & Datalogger technologies. - Establish industrial process controls via IoT to enhance energy efficiency and environmental management. Ideal Freelancer Qualifications: - Proven experience in IoT device development, preferably within an industrial setting - Familiarity with MQTT, AWS, LoRaWan and Dataloggers - Proven track record in energy and environmental management - Ability to deliver accurate, property-level data precision. - Full PCB layout, design and development Your advanced skills a...
We are working on a power converter board and looking for an expert in MCU stm32. We are using the stm32G474ret6 and having several issues that we are not being able to explain . The main issues are : startup state of MCU systick clock for hal_delay non functional Debugger resetting MCU in middle of operation code not stored in memory after powercycle . We are looking fo...stm32. We are using the stm32G474ret6 and having several issues that we are not being able to explain . The main issues are : startup state of MCU systick clock for hal_delay non functional Debugger resetting MCU in middle of operation code not stored in memory after powercycle . We are looking for somebody that is very used with stm32 MCU and know about electronic schematics and circuit for mcu integratio...
...force behind a key industrial project, I'm currently in the market for a talented and meticulous PCB board developer. Your knowledge of the Internet of Things will be challenged, with the board needing to achieve: - Seamless Wireless connectivity - Comprehensive Sensor integration - Precise Data logging capabilities What's the end goal? Enhanced industrial monitoring. This board will lie at the heart of our operation, gathering and transmitting valuable, real-time data back to us for accurate monitoring and decision making. The must-have communication protocol for this board? WiFi. It's a non-negotiable, ensuring our board remains connected and efficient. If you're well versed in PCB design, experience with WiFi connected devices, and have a...
I'm in need of an Electronic Technician who can design a PCB board. I would provide the schematic diagram drawing, dimensions and a bill of material of all the components. All I need is the PCB design in a format that I could send to print. Simulation is a plus. Key Responsibilities: - Designing and developing the PCB board. Ideal Candidate: - Proficiency and experience in designing PCB boards. - Understanding of electronic devices and their components. Please include a detailed project proposal in your application.
I need an electrical engineer with a strong background in designing and building high resistance measuring circuit solutions. You'll specifically be working to design an electrical module that focuses on two main functions: 1. Measuring Circuit Resistance - The module should be able to accurately measure high levels of resistance, specifically, greater than 100 ohms. 2. Fault Identification and Display - The module should be able to not only detect a fault in the circuit but also display this fault for an operator to see and diagnose. Ideal candidates should have: - Strong knowledge and background in electrical engineering, specifically circuits. - Experience with designing for high resistance applications. - Understanding of fault diagnosis and re...
I need Altium Designer expert to review the schematic/PCB, change the dielectric material to Rogers RO4003C, resolve DRC issues, correct any issue in the PCB , and ensure that the PCB is manufacturable. The designer should also generate the necessary files required for manufacturing and assembly. The PCB is already routed, but some modifications may be required. The PCB is a simple 6-layer PCB with 2 through-hole connectors, and all other components are surface-mount with 2 or 3 terminals. All changes should be documented in detail.
...and a forward-thinking approach. • Solution-Oriented: Aitify helps businesses unlock valuable insights from their data. The logo should subtly communicate problem-solving and data analysis capabilities. Design Preferences: • Style: Modern and minimalist, yet approachable, suitable for a technology-focused company. The design should be clean and not overly complex, ensuring it is easily recognizable and scalable for various uses. • Symbols: Consider incorporating elements that symbolize AI, data analysis, and technology, such as neural networks, data graphs, or circuit patterns. The design should subtly reflect the analytical and technological nature of our services. • Typography: Sleek, professional typeface. The font should be moder...
I need a hardware engineer adept at handling Power Supplies, particularly, Switched Mode Power Supply (SMPS). The core task will be: * Designing an SMPS circuit Ideal candidates should have: * Extensive experience with SMPS circuit design * Profound understanding of Power Supplies in general * Strong problem-solving abilities for any potential complications during design phase * Ability to work efficiently and meet project timelines If you're equipped with these skills, I encourage you to place your bid. Your expertise will be vital to the success of my project.
I'm looking for someone with the right skills to help me design a schematic and PCB layout for an electronic personal gadget. It's essentially a miniaturized, spherical device. Your work will be key to bringing this gadget to life. I need a skilled engineer to design the schematic and PCB layout for a compact video projector encased in a spherical, medical-grade silicone housing. Here are the specifications for the PCB: - The PCB should be circular. - It must have a maximum diameter of 15 millimeters. - The memory should be at least 10 MB, ideally 16 MB, to ensure ample storage. - The memory needs to be capable of supporting PDF files, though text files or images are acceptable alternatives. - The projector should be able to display con...
I need an electrical engineer to perform circuit design and troubleshooting tasks using a hardware simulator, specifically for .HDL files. Your primary task will be to install an electrical system with the help of the simulator. Key Responsibilities: - Circuit design using the simulator - Circuit troubleshooting - Electrical system installation I require you to be proficient in using a hardware simulator, especially with .HDL files. You should also have a solid understanding of circuit design and troubleshooting. Time is of the essence, so the quicker you can complete the project, the better.
I'm in need of an experienced electronic embedded system developer to create a cutting-edge blood pressure monitor medical device. The project involves schematic, pcb, firmware development, as well as algorithm creation, testing and monitoring. Additionally, the device should be able to interact with an Android app for display and control purposes. Key features: - Bluetooth connectivity: The device should be able to connect to other devices wirelessly. - Real-time monitoring: The device should provide continuous data so that users can monitor their blood pressure in real-time. The Android app should include: control device and viewing data with scheduling. Regulatory Standards: - CE (Conformité Européenne): The device must adhere to European standards for healt...
...basic single-layer PCB prototype. Here are the essentials: - This circuit creates a pulse amplitude modulated signal which is amplified at high power. The signal is genrated within the circuit so no user input is required. - This project has been worked on before and an added varible resistor and mosfet will be needed as well as the most important part which is power management which can be done with component selection or circuit alterations. - The purpose is a prototype development, which means you'll be instrumental in bringing my concept to life and preparing it for eventual manufacturing. - The PCB design will incorporate analog components, so expertise in working with these components is a must. You should be comfortable explain...
We are seeking an experienced PCB designer to develop a custom printed circuit board for a Raspberry Pi 4 Model B application. The project requires integrating specific components and ensuring the design can be enclosed within a standard industrial box. The successful applicant must have experience with power management and GPIO pin utilization. Key Requirements: - Experience with Raspberry Pi designs and GPIO pin functions. - Ability to integrate electronic components such as 5V relays into the PCB with high precision. - Familiarity with standard industrial connectors and terminals. This project aims to create a highly functional and reliable hardware system. Only applicants with a strong track record in custom PCB designs and the ability to work to e...
...and clean design for a standard size envelope. It will be primarily used for business correspondence, hence, should convey a professional image. The design should be cogent, elegant yet minimalist. Key considerations: - Design should be unique, communicating business professionalism. - A keen eye for aesthetics and details will be appreciated. - Previous experience or portfolio in envelope, stationery or corporate-designs will be a plus. Please ensure your proposal includes links to some of your past relevant work. I'm hoping for a swift turnaround time without compromising on quality. Design Preferences: Colors: We prefer shades of blue (but feel free to get creative!). Design Elements: We envision a modern, sleek, and tech-inspired design...
I'm looking for an experienced electrical engineer to help with the redesign of my current circuit, which is in CircuitLab format. Your role will involve: - Adding or removing components as necessary - Reorganizing the layout to enhance clarity and organization - Possibly correcting errors you may encounter along the way Ideal skills would include proficiency in CircuitLab, a keen eye for detail, and in-depth knowledge of electrical circuit design and optimization. You should also be able to work independently and make recommendations for improvement where you see fit. Previous experience in similar projects would be beneficial.
We're looking for someone who can make a few changes to a PCB using Altium Designer and has experience and an education in electrical engineering. It would also be an advantage if you are familiar with the ESP32C3, creating circuits is not a problem for you, but it is also not a problem for you when troubleshooting, especially in the RF area. Out of discretion, we do not want to post the exact requirements publicly. However, we will send this to you in advance to discuss working hours and price if the requirements match your profile. Thank you
ARCA means new beginnings. The A is very important to stand out. I am looking for more creativity using the attachments as a reference. One idea could be For the logo to be the letter A . The letter A can be of a thicker size, please post different options. It could include a wave in the middle with the colors described? This is just an idea. Key Points: - Company Name: ARCA Marketing - Color Scheme: Purple (Transformation), Blue (ARCA going through a storm of chaos, new beginnings) - Design Style: Artistic, Creativity, Friiendly, App friendly Attaching some current logos as Ideas. Thank you
I need assistance in simplifying the library management of a Platformio project. I need the openDTU Project to be simplified so that all the network and mqtt stuff is removed. I want just the inverter control functionality in that library so that im able to control it with the ESP32 without internet connection.
I need someone who can simplify a c++ project for me. The project is the openDTU repository on GitHub () . I want just the inverter control functionality without all the web and cloud connection stuff. I want a library where I can add a device and control it on a ESP32 directly without connecting it to the internet.
I am looking for a proficient C++ develo...who can simplify the openDTU projekt so that I will have only the inverter control functionality without all the other protocols. I want to be able to control the inverter with the ESP32 directly. over the nrf24l01+ module. The Projekt is found at: The OpenDTU is a DTU which enables control of multiple different solar inverters. The Projekt uses a web app to add/delete inverters and show or control the values which the solar panels are producing. I want to use the inverter control functionality inside of my own project so that I need library where I have the same features than in the web app but controled in my own code. So the task is to simplify the openDTU project for just the inverter control functionality.
I require a professional with expertise in Electrical Engineering or more fields to design schematic and PCB layout for a mini videoprojector, and a sferic case which I can print. What I need for this PCB:
- Must be round
- Must have max 15 milimeters diameter (1,5 centimeters)
- The components used should be good quality
- Must have minimum memory capacity of 10 MB (I think 16MB it's more than sufficient)
- The memory must support pdf or text (pdf preferably, but text is also ok or worst case images)
- This minimalistic videoprojector must have an option to project this pdf/text/img in any way (like a normal projector on walls, it's ok if will be smaller projecting final image; or like kids toys, where you are looking into a magnifier and see images)
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...on a plane, resembling the effect of water droplets falling onto a surface. Current Progress: We have an initial setup that generates a basic wave-like pattern, but it needs significant enhancements. Requirements: Customization of Waves/Droplets: Ability to specify the number of waves/droplets, which should appear at random positions on the plane. Boundary Constraints: The outer edges of the plane must remain flat without any elevation from the waves. Falloff Control: The waves should decrease in intensity with distance from the center of each droplet impact. Randomized Intensity: While the falloff should be consistent, the peak height of each wave should vary randomly. Deliverables: A Blender file containing the fully functional geometry node setup as per the above sp...
As someone passionate about electronics, I am looking to create a PCB layout specifically for large, rectangular, tri-color LED display panels - a design that goes from scratch. Here’s exactly what I am looking for: Requirements: - PCB Design expertise with a keen eye for detail. - Handle the complete PCB layout design process, starting from scratch. - Apply knowledge of tri-color LED panel technology in PCB design. - Assist in producing a PCB layout tailored for large, rectangular shaped LED panels. Skills & Experience: - Experience in PCB design & layout. - Hands-on experience with LED technology, specifically tri-color panels. - Proven track record of designing PCB layouts from scratc...
I'm seeking a professional with expert knowledge in precision analog design. Goal of the project is a small prototype board to measure K type thermocouple elements - with two different approaches. Additionaly obvisouly a MCU will take place - as well as RS485 communication. Absolut main aspect is an accurate (in sense of stability, low noise and absolute value representation) K thermocouple element measurement. Two approaches are forseen - using the high precision MAX31856 as well as the AD8495 in conjunction with a 20-bit SAR and 24-bit SigDelt ADC. Apart from the ADC proposition the project comprisis of a full circuit and PCB creation. Additionaly also the needed firmware for the respective communication (over SPI) shall be properly implemented (well structur...
...extensive checklist. The purpose of this project is to produce resources that our clients can use to ensure their websites and digital content are accessible and inclusive for all users. Specific Tasks: Tool Demonstration and Evaluation: ================================ Demonstrate and evaluate tools that analyze accessibility barriers and produce reports. Familiar tools you might consider include: - WAVE (Web Accessibility Evaluation Tool): A comprehensive tool for both visual and technical accessibility audits of websites. - Axe Accessibility Checker: An in-browser tool that identifies issues in real-time as you browse. - Google Lighthouse: An automated tool by Google that generates reports on various aspects of website performance, including accessibility metrics. Creation ...
I'm in need of a PCB design for prototyping purposes. The board's complexity is a double-layer one, and its dimensions are very small, up to 2 inches. The PCB design must be suitable for prototyping, so it should be well-structured, compact and efficient. Key details: - MCU: ESP32 - Interface: Wifi/Bluetooth - Number of sensors to be interfaced: 4 - Type: Prototyping - Complexity: Double-layer - Size: 40mm dia Ideal skills for this project: - PCB design experience, specifically in prototyping - Proficiency in designing double-layer boards - Ability to create compact and efficient designs - Familiarity with small form factor PCBs.
I'm currently in need of a proficient engineer who can handle an intermediate level task on Cadence Virtuoso. This complex project requires a mixture of analog and digital circuit designs. Here's what you'll need to bring to the table: - Proven experience with Cadence Virtuoso - Capability to work on intermediate level complexity designs - Understanding of both analog and digital circuit designs, as the project involves mixed-signal circuit designing You don't need to have Cadence Virtuoso on your PC, as you can access my system remotely via AnyDesk to complete the task. Looking forward to working with someone who can meet these requirements for a successful project completion.
...electronics engineer to develop a circuit board with a microcontroller with ethernet connectivity, POE power and addressable LEDs, with the design done using EasyEDA software to be fully manufactured by JLCPCB (or equivalent). The core functionality of this project focuses on power management. Your skills and expertise should include: - Comprehensive understanding of EasyEDA software (can take other suggestions) - Proven experience in multi-layer circuit board design - Extensive knowledge in PCB design for power management This project requires intricate knowledge of these areas, so please only bid if you're confident in your ability to deliver. Looking forward to working with experienced and dedicated specialists. Proven portfolio re...
I am looking for a specialized electronics engineer with a proven track record in printed circuit board (PCB) design, specifically tailored to handle sensor signals. In particular, the PCB should receive WiFi-based signals from sensors monitoring temperature, pressure, and vibrations. The scope of the project is as follows: 1. **Sensor-PCB Communication:** The maximum distance between the sensors and the PCB would be less than 10 meters. A strong understanding of short-range wireless communication is essential. 2. **Durability:** The PCB design needs to prioritize durability. Please demonstrate past work in creating robust and long-lasting PCB designs. 3. **Equipment Performance Tracking:** The primary purpose of the sens...
100 Tons Weighbridge controller PCB design with RFID
100 Tons Weighbridge controller PCB design with RFID
I'm looking for an experienced MATLAB-Simulink professional to help me simulate DC arc faults in PV system. Key Project Details: - The primary purpose of the PV system is power generation. - I n...Project Details: - The primary purpose of the PV system is power generation. - I need the simulation to provide details on basic electrical parameters and arc dynamics. - I need the simulation using different arc models (Cassie, Mayr, Habedank, Kema, Paukert, Modified Paukert, Heuristic). - The Pv system (20 kW) should be connected to the grid. - The Pv system should have a dc-dc converter and inverter. The ideal freelancer for this project should have: - Strong expertise in MATLAB - Simulink - Experience with simulating electrical systems - Familiarity with photovoltaic systems ...
I'm looking to upgrade my current ESP8266 controller to an ESP32 C3 Mini controlle...Mini controller. I am primarily interested in freelancers with specific experience in this upgrade. Here's what I need: Requirement -1 : 1. Update existing Master Controller board based of ESP8266 to support ESP32 C3 IPEX/ (EasyEDA PCB design) 2. Retain GPIO connections and other circuits and components. 3. Ensure the position of LEDs, buttons and interfaces are as in current design 4. Ensure that the device supports handling loads upto 3A total without any heat with each port support upto 1 A Requirement -2 : 1. Redesign existing Zone Expander PCB board from Eagle to EasyEDA 2. Add LED Power indicator option 3. Ensure that the Expander handle upto 3A without any ...
I'm in need of a talented PCB designer who can assist in creating a simple but effective PCB for a power supply. Key Responsibilities: Need a Small PCB which will contain NodeMCU, 4 Relay, AC to DC 5v. This board is for home automation project which will connect through WIFI, RF and control all home appliances. Ideal Skills: - Proven experience in PCB design. - Understanding of basic power supply principles. - Proficiency in PCB layout softwares, like Altium or Eagle. This is a straightforward project suitable for a skilled PCB designer looking to take on a quick gig.
I'm in need of a PCB design. The primary purpose of this project is for prototyping a simple layout. Key Requirements: - Design a single-sided PCB layout - The size of the PCB should fit in the small area you see in the attached photo, so it’s a unique shape. - There will be two automotive LEDs that connect to the PCB, so 4 wires, however, the 2x ground works be best connected and then the positive for each light. I’m considering using a magnetic Pogo connector for the output and it would need 4 connections. You’ll see in the second image, the wiring is for an indicator/brake/running led. So the brake/running are connected and it works as such. The running light is a dimmed red LED, then when the brake is pressed the red l...
(NO AI) I’m looking for a logo for my swimwear brand VKINI. I want an simple with small details of like ocean elements or water such as a wave, a mermaid tail, a shell etc. the logo should include VKINI in all caps I’m open to different fonts as long as vkini is clear. The logo should be neutral warm colors such as a beige off white, light blue etc. PLEASE be creative I want a clean looking logo that is sleek but you can tell it’s a swimwear or beach wear logo. I’ve attached images of some cool icons that can be incorporated and the vibe that I’m looking for. I added some color ideas in the attachments!
I am looking for a skilled PCB designer to create a prototype that fits within a medium-sized, 2 to 4 inch space. This PCB should be tailored to contain an Arduino Mini and a 12V to 5V buck converter, with 3 pin and 2 pin JST GH connectors. The configuration of components on the PCB should follow a clustered arrangement to maximize space efficiency. This job does not require mass production capability at this time, with the primary focus being on creating a single prototype. Ideal candidates should have experience with Arduino components and compact PCB design.
I have code for login trading accound and fetch token data. I need to update code with this field 52w High, 52w Low, Upper Circuit, Lower Circuit, Market Capital Data. I have already collect data from Time interval I need to get week Interval Ohlc data as well. If i chanage time interval it will display those data only. Stock Broker account: If Buy signal find it will automaticlly place Buy order,etc., Note: I dont know about coding, If you install the code and run successfully at my system thereafter I will hire you and release the payment. If you agree this term you will apply this task Budet is 600 INR and Good review, Dont expect more I am not big fish. it is difficult job dont come for Money you should waste you time for unrealish Expectation
I'm seeking an experienced hardware engineer to design a robust PCB which will fully support my Raspberry Pi 3 Model B+. This PCB is planned to be a part of a control system. The main requirements for the project are as follows: • Full Raspberry Pi 3 Model B+ compatibility support - Your design should take full advantage of all the features of this model. • Control system orientation - The PCB down the line will be used as a control system, all design decisions should keep this in mind. This project requires that the PCB has a 110/240 V input and have a 5V Output and 8 Relay Out of 10V. Some basic requirements for candidates: • Strong knowledge in Raspberry Pi and PCB design is preferred. • Prior expe...
I hope you are good. I have read your description carefully and understand everything. I’m Electronics engineer who have 25 year experience on analog design, renewable energy, power electronics, motor control, microcontroller coding and PCB design. I have used Arduino, PIC, MSP430, C2000 and STM32 for 8 years. I have developed several codes by using their IDE and compilers. I know all principles of them. And I can do microcontroller simulation by using Proteus. Proteus have microcontroller model and peripheral components to simulate the code. The code can be debugged by using COF file also. Simulation result is same with real time application.
I have code for login trading accound and fetch token data. I need to update code with this field 52w High, 52w Low, Upper Circuit, Lower Circuit, Market Capital Data. I have already collect data from Time interval I need to get week Interval Ohlc data as well. If i chanage time interval it will display those data only. Stock Broker account: If Buy signal find it will automaticlly place Buy order,etc., Note: I dont know about coding, If you install the code and run successfully at my system thereafter I will hire you and release the payment. If you agree this term you will apply this task Budet is 600 INR and Good review, Dont expect more I am not big fish. it is difficult job dont come for Money you should waste you time for unrealish Expectation
I need a single-layer PCB designed for a consumer electronics product. It involves the integration of sensors and a timer. Basically,, a very small circular pcb board that has 12 micro led lights. And all lights turn on when double tapping was detected, then last about 10 seconds then lights turned off. Using two 1.5v coin batteries. Just that, nothing less and nothing more. Oh, but it has to be very small. Approximately 30mmx30mm. Thank you Regards
I need assistance finishing a 12v circuit capable of effectively powering a LED light bar in a vehicle. Not ricer stuff, on an emergency vehicle. See attached diagram. Key job responsibilities include: - Designing a 12v circuit that fits my requirements - Adapting the design to the specific type of LED lights I use - Ensuring the configuration is optimized for 1-5 LED lights Ideal candidates should have: - Extensive knowledge of and experience with 12v circuits - Experience working with LED lighting systems - Strong problem-solving capabilities to troubleshoot potential issues and offer robust solutions - Excellent communication skills to explain the circuit design and any necessary precautions or maintenance tips. I value attention to detail and effi...
I'm in search of a skilled electronic engineer who can design and build a specialized electronic circuit for me. The purpose of this circuit is to measure pressure using a flat piezo element, read the analog data, and then transmit it via Bluetooth to an Android smartphone. Key Points: - The circuit needs to handle a range of 0-100 PSI. It should accurately measure the pressure and convert it into a readable format for the smartphone. - The circuit should be compact and user-friendly, allowing easy pairing and operation with an Android smartphone. Ideal Candidate: - Strong background in electronic engineering, particularly in designing circuits for sensor data processing. - Prior experience in working with piezo elements and pressure transducers...
...very much! I urgently need a qualified freelancer to produce both electrical and mechanical engineering drawings for a project. Requirements: - Expertise in Electrical Drawings: This should include detailed circuit diagrams specifically for a fire system control. - Proficiency in Mechanical Drawings: Expansive knowledge on creating and interpreting mechanical engineering drawings. Ideal Skills and Experience: - A degree in Electrical and Mechanical Engineering - Proficiency in using CAD software for creating and reviewing drawings - Previous experience in Fire System Control Design will be a plus. The project needs to be completed ASAP, thus the freelancer should be ready to begin immediately. Your proposal should clearly indicate your experience and ability to com...
I am searching for an experienced electronics technician with these qualifications: - Proficient in soldering - Knowledgeable in Integrated Circuit (IC) replacement - Skilled in troubleshooting The project involves repairing motherboards facing various issues, including overheating, power failure, boot up issues, among others. There's no single specific problem so I need someone versatile and adept in handling diverse issues. Please detail your experience working with similar projects in your application. Your expertise is crucial to ensuring the job is done properly and efficiently. Make sure that you are available around the mtwapa, kilifi Kenya.