PCB Design for USB C Powered LED Project

PCB Design for a USB-C Powered LED Project

We will select a freelancer within 12 hours. Once the project begins, the design must be completed to a manufacturing-ready standard within 12 hours.

We are looking for an experienced PCB designer to create a simple PCB featuring a USB-C connector. Preference will be given to candidates with experience in designing PCBs that meet specific power requirements and who can develop efficient layouts for LED integration. Please provide examples of similar work you have completed in the past.

The system will use a custom cable—not a standard USB-C cable—that carries only +5V and GND connections and must support up to 30W. The main PCB will include a USB-C connector and a brightness control (dimmer) button. There will be an LED PCB (1x2 cm) equipped with four bright LEDs facing different directions (the light will be diffused through a 3D-printed diffuser). Additionally, the design includes four 1x1 cm daughter boards, each featuring a specialized LCD. Beyond the LEDs, a specific line may draw up to 5V 2A. If the power supply is insufficient to run the entire system, the logic must automatically dim the other LEDs to ensure that at least 5V 1A is reserved for that specific line. In short, the system requires logic to prioritize power allocation to a designated line while adjusting the brightness of the remaining LEDs.

The brightness control button, located next to the USB-C connector, should cycle through the following brightness levels: 70 → 80 → 90 → 100 → 90 → 80. Due to extremely tight time constraints, this project will proceed directly to the production of 1,000 main PCBs and 1,000 sub-board PCBs, skipping the prototyping (sample testing) phase. While there is no separate compensation for the PCB design itself, you must provide access to the design files for manufacturing purposes. By accepting this project, you agree to these terms.

Final payment will be issued only after the PCBs have been received and verified to function exactly as designed. In the event of a dispute, we will cover the shipping costs to send the units to you so that you may personally verify any errors. If you remain unsatisfied, we will arrange for the products to be sent to you directly via PCBWAY. Please be assured that we have no intention of withholding your earnings unfairly. If the products function correctly and the project is completed successfully—meeting all requirements despite the tight schedule—the agreed-upon payment will be made. If even a single error is discovered, the project will be considered a failure, and no payment will be issued. In such a case, we would incur a significant loss from the production of unusable PCBs. The payment we provide is not for the PCB design itself, but for the delivery of a fully functional product within the required, urgent timeframe.

The project milestones are structured as follows: An initial payment of $100 will be made for the PCB review and the placement of the order with the manufacturer. The remaining balance will be released as 'Milestone 2' once the products have been received from the manufacturer (PCBWAY) and verified to be fully functional, with all features operating perfectly. Every function must work flawlessly.

This project must be completed within 24 hours. Applicants will be selected within 12 hours.

Proposed BOM (Bill of Materials):

Board 1 (Design to be as compact as possible)
1x USB Type-C female connector (TYPE-C-31-M-12): Must protrude from the PCB to allow for cable insertion.
1x 90-degree push-button (PBH2UEESNPNAGX): Intended for a 'soft-touch' operation; please position it 0.5 cm to the right of the USB Type-C female connector.
1x 2-pin header for a battery charger (supporting up to 5V 2A).
1x Scroll wheel for master dimming: Must allow for 100% brightness control. For example, if the scroll wheel is set to 50% and the push-button is pressed to toggle to 100%, the final output should remain at 50%. (Suggested component: COM-09806; feel free to propose an alternative if you know of a more suitable part.) Given that the LEDs may generate significant heat and the product enclosure is made of plastic, this is a critical design consideration. It is highly likely that this value will be permanently fixed at a very low level. This is extremely important! + Added a safety feature to the board: the power supply will cut off completely if the total power consumption exceeds 50W.

Board 2 (2.5 cm in length, 1 cm in height)

4 units of SPMWH1228MD7WNWYVK (or an equivalent component) – Warm-colored LEDs, distributed evenly across the PCB.

Board 3 (3 cm x 1.5 cm; consists of 3 rows, each 0.5 cm wide, with LEDs positioned in the center of each 0.5 cm segment)

7 units of SPMWH1228MD7WNWYVK (A) – Warm-colored LEDs
2 units of JE2835AGR-N-0002A0000-N0000001 (B) – Green LEDs
1 unit of JE2835AFR-N-0001A0000-N0000001 (C) – Red LED

Layout:

A - - - - -
A B B A A C
- A - A - A

If you are able to complete the task within 12 hours,

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來源：Freelancer.com | 出價次數：8 | 剩餘時間：7 日 | 專案類型：固定預算