DC18-AC220V Inverter Project

I have several ready-made samples of steam fireplaces, including a model that serves as a reference for quality, design, and functionality. The task is to develop a proprietary product under our own brand based on the analysis of existing solutions. Main tasks: complete technical analysis of existing samples; disassembly of the structure and components; determination of the operating principle of all units; preparation of technical documentation; creation of a bill of materials (BOM); selection of alternative suppliers for components; cost evaluation of production; development of the concept for our own product; preparation of a plan for transitioning from prototype to mass production.

Develop a control program (G-code) for a CNC milling machine for cutting parts from a solid blank using the nesting method (optimal packing). Initial data: — 3D models of parts in the format you need — Material of the blank: polystyrene — Size of the machine table and blank: 1200×1200×150 mm — Machine: three-axis milling (to be discussed) — Diameter of the cutter: to be discussed — Number of axes: 3 Requirements for the result: — Optimal placement of parts with minimal material waste — Correct allowances for tool diameter (radius compensation) — Technological bridges (tabs) to hold parts during cutting — Order of passes: rough pass → finishing — Post-processor for the specified machine controller — G-code file + screenshot of the trajectory simulation Experience that is mandatory: — Work in a CAM system (Fusion 360 CAM / Mastercam / SolidCAM / ArtCAM or similar) — Experience in nesting parts — Understanding of cutting modes and feeds for specific materials In your response, please specify: — The CAM system you are working in — Machine controllers for which you have written post-processors — An example of a completed similar work

Good evening! It is necessary to assemble a lamp using electronic components that are sold in the USA, specifically on specialized sites. If you can design the casing where these components will be inserted - great, if not, that’s fine too. The components need to be selected so that minimal effort is required for connection. Two options are needed: Option 1: A bedside lamp that can be charged via USB-C in 2-3 hours and the charge lasts for at least 100 hours of operation + battery discharge indicator + touch activation. Option 2: The same but with added Wi-Fi and connection to smart home systems like Google/Amazon Alexa and others + the ability to charge via wireless charging, so include wireless charging. Work stages: 1. Provide a list of components and connection instructions to assemble without designing the casing. 2. We assemble the model and check that it works. 3. We close the project.

Development of a mechanism for alternating the flipping of plastic cupsProject Goal It is necessary to develop only the mechanism for flipping plastic cups "every other one" for an automatic production line. The device must ensure the following sequence: 1st cup — without flipping (0°) 2nd cup — flip 180° 3rd — without flipping 4th — flip 180° and so on. As a result, the output should produce the sequence: 0° → 180° → 0° → 180° → ...What is already available The cups move along the conveyor in a single row. Before the mechanism, all cups have the same orientation (lid up). Only the flipping unit needs to be developed.Proposed Operating Principle The following scheme is considered: A dividing screw synchronizes the flow of cups. All cups gradually rotate to the position of 90°. Then, the cam mechanism acts only on every second cup. Every second cup returns from the position of 90° back to 0°. The others continue rotating to 180°. As a result, we get: 0° 180° 0° 180° If the performer offers a simpler, more reliable, or more technological solution — we are ready to consider it.Requirements1. Develop a complete 3D model in SolidWorks It is necessary to model: dividing screw; flipping mechanism; cams; guides; shafts; mountings; all necessary parts.2. Perform kinematic verification It is necessary to ensure that: the mechanism operates without jamming; there are no intersections of parts; the cups are flipped correctly; the mechanism is suitable for manufacturing.3. Conduct Simulation / Motion Study It is necessary to perform an animation of the mechanism's operation in SolidWorks Motion. It should be visible: the movement of the cups; the rotation of parts; the sequence of flipping every second cup.Work Result The performer must provide: source files SolidWorks (*.SLDPRT, *.SLDASM); assembly; Motion Study; animation video; STEP file of the assembly; drawings of the main parts.

Project Description:I am looking for an electronics engineer for a paid technical consultation on repairing network equipment.Problem Summary:There is a 4-channel GSM-VoIP gateway GoIP4. The device has started to go into a cyclic reboot (the relays click every 2 minutes, it does not accept calls, and it resets authorization).What has already been checked:The power supply has been replaced with a known working one (12V/2A) — the problem persists.SIM cards have been removed and checked — the symptoms are the same without them.The problem is 99% likely to be in the hardware (internal power circuit on the board, degraded capacitors, or a burnt-out DC-DC converter).What is required from the contractor:Consult on typical issues with this board and suggest which power circuit elements should be checked first with such symptoms.Important: If you are located in Cherkasy (or are willing to accept the board via Nova Poshta), we can arrange for physical diagnostics and re-soldering of components as part of this project.Please respond if you have experience in component-level repair of motherboards, routers, or similar telecommunications equipment.