Engineering of RCD

We need a design engineer or a spring design specialist with experience in calculating and developing design documentation. Required tasks: calculate spring parameters according to specified technical requirements and samples; select the optimal material according to operating conditions; determine the main geometric parameters (wire diameter, outer/inner diameter, number of turns, pitch, length, etc.) from the provided sample; perform verification calculations (stress, working stroke, resource, safety margin); prepare drawings for further production; provide a specification indicating the material and main technical characteristics. Types of springs: compression springs; extension springs; torsion springs (if needed). Requirements for the performer: experience in spring design; knowledge of standards (DIN, EN, ISO, GOST or similar); understanding of spring manufacturing technology; At the beginning of cooperation: The development of several springs is planned. If the cooperation is successful, long-term collaboration with regular orders is possible.

We are preparing to open a primary healthcare clinic (first floor, ~200 m²). There is a current layout plan with dimensions (PDF in attachments) and photos of the premises. The main area is an open space of 109.26 m² with panoramic windows along the arc and round columns. What needs to be done: Planning solution. Place 4 additional doctor’s offices in the open area of 109.26 m², while maintaining the reception, waiting area, access to the procedure room, restrooms, and emergency exits. The offices should be approximately 10–14 m², preferably with natural lighting. The solution should be budget-friendly: lightweight partitions (aluminum/drywall, as in the photos already installed), without major changes (but we are ready to consider alternatives). Minimal interior design concept. A unified palette and materials for the entire clinic (walls, floor, lighting, reception, waiting area), navigation within the premises. No expensive decor — clean, bright, modern, “medical.” 2–3 visualizations of key areas (photorealism is not mandatory). We have a brand book. Facade concept. The exterior appearance with the clinic sign and window decoration, 1–2 angles. Minimal interventions, no reconstruction. Drawings. Updated plan with dimensions and explication — PDF + output (DWG or similar). In your response, please indicate: cost (can be phased: plan → design → facade), timeline, examples of similar work (medical/commercial premises — a plus). We are open to considering options from beginners.

“Good day! I need to develop a drawing of a machine (device) for stitching sheets of agricultural crops. I will provide photos and video materials. Main requirements for the project: Simplicity of design: The machine should be as simple as possible to manufacture and assemble. It is preferable to use readily available materials that can be easily purchased. I understand that some parts will still need to be made individually (custom-made). There are no obstacles with shaping (bending) sheet metal and welding work. Reliability and minimal maintenance. Desired power supply is 220 V. However, I leave the final decision to you — as specialists, you know better which option will be better and easier to implement. Below, I am adding videos with examples of similar machines, as well as videos of similar devices for stitching brooms — perhaps some design solutions can be borrowed from there for our project. Have a great day, I look forward to your proposals!” https://youtube.com/shorts/rT6q4pa_VSY?si=_6iCZLlPV0YXvtUo https://youtu.be/V9nMWLxpIbA?si=xfFpMIFf6qxE0WRB

Output data: Existing building: single-story office building; structural scheme — frame-less brick; external walls thickness 380–640 mm; internal load-bearing walls thickness 380–510 mm; ceilings — precast reinforced concrete hollow-core slabs; foundations — columnar with FBS blocks; approximate dimensions of the building — 40.34 × 28.84 m; building area — about 747 m². Planned: dismantling of the existing rafter system and roof; addition of a second floor with glued laminated timber structures; installation of a new wooden roof structure; reconstruction of the existing building with partial changes in loads on load-bearing structures.Required to perform: Analysis of the provided technical report on the building inspection. Verification calculation of existing foundations, walls, and ceilings for the perception of additional loads from the addition. Development of structural solutions regarding: installation of reinforced belts; strengthening of brick walls; strengthening of foundations (if necessary); ensuring spatial rigidity of the building; nodes for load transfer from glued laminated timber structures to the existing building. Calculation and justification of the adopted solutions. Issuance of a set of drawings for the stages of KB/CM/KZ (depending on the adopted solutions). Consulting support during the development of wooden structures and implementation of the project.Output documentation: Scientific and technical report on the building inspection. Measurement drawings. Architectural solutions for the addition. Preliminary concept of glued laminated timber structures.Requirements for the contractor: availability of a design engineer certificate in terms of ensuring mechanical resistance and stability; experience in the reconstruction of existing buildings; experience in designing the strengthening of brick or stone buildings; preferred experience working with additions of wooden structures or glued laminated timber.Message text for Freelancehunt Good day. We are looking for a designer to participate in the project of reconstructing an existing single-story brick office building with a subsequent addition of a second floor made of glued laminated timber. It is necessary to take on the development of structural solutions regarding: reinforced belts; strengthening of existing brick walls; if necessary — strengthening of foundations; ensuring spatial rigidity of the building; load transfer from new wooden structures to the existing building. A technical inspection of the building and measurement drawings have been completed, which will be provided to the contractor after preliminary discussion of the project. Preferred experience: reconstruction of existing buildings; development of solutions for strengthening stone or brick structures; work with additions or wooden structures. Please include in your response: a brief overview of your experience; examples of similar completed projects; available certificates; estimated budget and timelines for the work. We are ready for long-term cooperation on similar projects.

We are looking for a physicist engineer or a design engineer with experience in developing induction chargers, Qi/Qi2, and working in KiCad. We already have: a ready-made wireless charging board for two devices; two coils for charging a phone and headphones; the case design and 3D models. What needs to be done Add a third charging channel for Apple Watch. Select and calculate the coil, electronic components, and connection scheme. Resolve the issue of correct Apple handshake and compatibility with Qi/Qi2. Check if the system can stably charge three devices simultaneously. Calculate the required power of the power supply, heating, and main electrical parameters. Consider the shielding of the coils, as the charger is installed inside a wooden case. Prepare or refine the schematic and PCB in KiCad. Provide recommendations on design, safety, and further certification of the device. We are considering two work formats: full development and preparation of files; engineering consultation with calculations and recommendations that our specialist can implement. Please, when responding, write: whether you have experience with wireless chargers Qi/Qi2; whether you have worked with Apple Watch or MFi components; whether you can perform calculations for coils, power, heating, and shielding; attach examples of similar projects.