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I have a working shortlist of LTE and power-supply components and now need a specialist to bring them together on the hardware side. The goal is a compact, battery-powered board that boots the chosen LTE module reliably, meets the module’s peak-current demands, and stays within the battery’s safe-discharge limits. What I already have • Datasheets and purchase links for the selected LTE modem, SIM socket, PMIC, Li-ion cell, and protection circuitry. • Preliminary schematic drawn in KiCad. What I need from you • Review and refine the schematic and PCB layout to eliminate power-rail dips, EMI issues, or antenna detuning caused by poor grounding. • Specify or validate in-line components—inductors, caps, TVS, fuses—so the battery section passes basic safety and CE/ETSI emissions. • Deliver updated KiCad files (schematic + 2-layer PCB) and a brief test-procedure document that shows how to verify current draw, thermal rise, and LTE link stability. Acceptance criteria 1. LTE modem starts and registers to network on a 3.7 V Li-ion cell down to 3.3 V. 2. In transmit bursts the voltage drop at the modem pins stays above 3.2 V. 3. Quiescent draw in idle ≤2 mA. 4. Gerbers pass DRC at JLCPCB. KiCad, Altium, or even Orcad experience is welcome, though I will ultimately need the final files back in KiCad format. If you have tackled LTE power domains or battery-powered IoT boards before, let’s talk timelines and any clarifications you might need.
Project ID: 40562771
16 proposals
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Active 2 days ago
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16 freelancers are bidding on average $27 SGD/hour for this job

Hi, Hope you are well. It sounds like a great job and aligns with where I'd like to take my career. I'm eager to learn more. I have experience over the past fifteen years as a PCB Design Engineer at Global Engineering services and RWR Private Ltd. You can visit my freelancer profile page; https://www.freelancer.com/u/ahsanfreelancer7 I’ve been consistently committed to Specific goals, skills or traits the new job entails. Could we schedule some time to discuss about opportunity in more detail? I’d welcome the opportunity to learn more about the role and share how my skills and experiences would benefit you. I’m available to talk at any time. I look forward to speaking with you. Best, AHSAN ULLAH
$25 SGD in 40 days
6.4
6.4

Hi there, As an Electronics Design Engineer (UET Taxila) with over 8 years of experience specializing in high-speed, battery-powered IoT hardware, I can deliver your reliable, production-ready KiCad design. I frequently optimize ESP32/STM32 + LTE cellular layouts, ensuring strict compliance with peak-current demands (preventing 2A transmit drops) and minimizing quiescent current to <2mA. I will refine your KiCad schematic, design a robust 2-layer PCB optimized for JLCPCB DRC, and handle EMI/antenna grounding. You'll receive optimized KiCad files, a test-procedure document, and guaranteed CE/ETSI-ready power integrity. Let’s discuss your timeline! Best regards, Muhammad Adeel
$25 SGD in 40 days
6.6
6.6

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq
$25 SGD in 40 days
5.2
5.2

Hello my name is Collins and I am a robotics and automation engineer specializing in embedded hardware design and am well-equipped to finalize your LTE-enabled IoT board. Proficient in both KiCad and Altium Designer, I understand the critical challenge of managing high-current LTE TX bursts while maintaining voltage stability and Li-ion safety. My approach ensures: Power Integrity: I will optimize your decoupling network to handle peak modem currents, preventing UVLO events during transmission. EMI/Layout: I will refine your layout to mitigate antenna detuning and EMI, ensuring robust signal integrity. Compliance: I will validate your safety components (TVS, fuses) to align with CE/ETSI expectations. Relevant Experience: I recently designed a power-delivery circuit for an industrial module requiring precise voltage regulation under fluctuating loads. By reducing parasitic inductance through strategic component placement, I eliminated intermittent reboots and achieved stable performance. I am fully comfortable migrating your Altium concepts into production-ready KiCad files. I am ready to deliver the updated schematics, PCB layout, and a comprehensive test procedure to meet your acceptance criteria. I look forward to discussing your current design and timelines.
$25 SGD in 40 days
4.8
4.8

Hi, i have experience with low power device, i have a power profiler tools to monitor consumption, i think i can help you design LTE board, i've been 11 years working in embedded system and kicad/altium is my main tool, so let me know if you are interested. We can start soon
$30 SGD in 40 days
4.4
4.4

Hi, I can review and refine your LTE battery-powered hardware design in KiCad, focusing on stable LTE boot, peak-current handling, battery safety, EMI control, antenna grounding, and JLCPCB-ready outputs. The best solution is to first review your LTE modem, SIM socket, PMIC, Li-ion cell, protection circuit datasheets, and current KiCad schematic/layout. Then I’ll validate the power path, bulk/decoupling capacitors, inductors, TVS/fuse selection, grounding, antenna clearance, and routing to prevent voltage dips during LTE transmit bursts. I’m comfortable with LTE module power design, Li-ion battery circuits, PMIC review, low-power IoT hardware, KiCad schematic/layout, 2-layer PCB routing, EMI/ESD protection, antenna layout concerns, JLCPCB DRC checks, and hardware test documentation. Deliverables will include: * Updated KiCad schematic * Refined 2-layer PCB layout * LTE power rail review * Battery protection validation * Capacitor/inductor/TVS/fuse checks * Grounding and EMI improvements * Antenna layout review * JLCPCB-ready Gerbers * Current draw test procedure * Thermal and LTE link test notes I’ll focus on making the board reliable, compact, and safe, so the LTE modem can register properly from the Li-ion cell and remain stable during transmit peaks. Best regards Ankit
$25 SGD in 40 days
3.5
3.5

Hi, I can review and optimize your existing LTE hardware design to ensure reliable battery-powered operation, stable LTE communication, and manufacturing readiness. Since you already have the component selection and an initial KiCad schematic, my focus will be on refining the power architecture, and improving PCB layout. I have experience with embedded hardware design, battery-powered IoT devices, PCB layout optimization, power management circuits, EMI reduction, and KiCad-based schematic and PCB design. The final design will be optimized for reliable LTE operation, low power consumption, and straightforward manufacturing through JLCPCB. Proposed Approach • Review the existing schematic and PCB layout to identify power integrity issues, grounding problems, EMI risks, RF layout concerns, and component placement improvements • Optimize the battery power path, decoupling network, protection circuitry, voltage regulators, and peak current handling to ensure the LTE module operates reliably throughout battery discharge • Validate or update supporting components including capacitors, inductors, TVS diodes, fuses, filters, and antenna matching recommendations while maintaining good RF layout practices and CE/ETSI-friendly design principles Deliverables • Updated KiCad schematic • Optimized 2-layer PCB layout • JLCPCB-ready Gerber files
$20 SGD in 96 days
2.3
2.3

Hi, I can review and refine your battery-powered LTE IoT board to ensure robust power delivery, stable RF performance, and compliance with your strict power budgeting. I work extensively in KiCad and specialize in optimizing low-power systems that face high peak-current demands. Technical Approach: Power Integrity: LTE burst transmissions can draw up to 2A bursts, causing catastrophic voltage dips. I will optimize the layout right at the module pins using low-ESR bulk capacitors (such as tantalum or specialized polymer caps) combined with local decoupling to ensure the voltage drop stays safely above 3.2V, even when the Li-ion cell discharges to 3.3V. RF and EMI Protection: I will enforce a proper 50-ohm coplanar waveguide for the antenna trace, clear keep-out zones under the antenna/module pad, and an unbroken ground plane to prevent detuning. Stitching vias will be placed strategically to suppress EMI. Low Quiescent Draw: I will review the leakage paths of the chosen PMIC, SIM interface, and level shifters to guarantee your idle current meets the under 2mA requirement. Deliverables: Refined, production-ready KiCad schematic and 2-layer PCB layout files. Manufacturing outputs (Gerbers, drill files, BOM, Pick and Place) passing 100 percent clean on JLCPCB DRC. A concise Hardware Test Procedure document detailing current draw profiling, thermal rise tracking, and LTE link stability verification.
$20 SGD in 40 days
1.4
1.4

Hi, I am interested in supporting your LTE IoT hardware development project. My background includes PCB design, embedded systems, power electronics, and battery-powered IoT devices, with experience optimizing mixed-signal layouts for reliable wireless communication and low-power operation. I can review and refine your existing KiCad schematic and PCB to ensure stable LTE operation, robust power delivery, and manufacturability. Special attention will be given to power integrity, grounding, EMI reduction, RF layout, and battery performance during high-current transmit bursts. My scope includes: - Review and optimization of the KiCad schematic and 2-layer PCB layout - Power integrity analysis to minimize voltage drop during LTE transmission - RF grounding and antenna layout recommendations - Selection and validation of inductors, capacitors, TVS diodes, fuses, and protection components - DFM review and JLCPCB DRC compliance - Battery power optimization to achieve low standby current - Complete manufacturing-ready documentation Deliverables: - Updated KiCad schematic and PCB source files - Gerbers, BOM, Pick & Place, and fabrication files - Power verification and test procedure document - Recommendations for CE/ETSI-oriented hardware practices - Support during prototype bring-up if required Best regards,
$50 SGD in 50 days
1.1
1.1

I understand you need to integrate specific LTE and power-supply components into a compact, battery-powered board that ensures reliable booting and meets peak current demands while respecting battery discharge limits. I previously designed a similar compact, battery-powered IoT device that successfully managed a cellular module's transient current spikes, achieving stable operation. I will refine your KiCad schematic, focusing on optimizing the power rails to prevent dips and mitigate EMI. This involves selecting appropriate decoupling capacitors, trace widths, and grounding strategies. For the PCB layout, I will ensure proper impedance matching for RF signals and thermal management for the PMIC and LTE module, producing Gerber files ready for fabrication. Could you clarify the expected operating temperature range for the device? Ready to start as soon as you confirm scope.
$30 SGD in 7 days
0.0
0.0

Hello, I would love the opportunity to work on your LTE hardware integration project. I have experience with PCB design, power management, and embedded hardware, and I understand the importance of designing stable power domains for LTE modules with high transmit-current bursts. I can review and refine your existing KiCad schematic and PCB, optimize the battery power path, verify component selection (capacitors, inductors, TVS, fuses, and protection circuitry), and improve grounding and layout to minimize voltage drops, EMI, and antenna performance issues. I will also ensure the final design is suitable for JLCPCB manufacturing by passing DRC checks. My deliverables will include updated KiCad schematic and PCB files, production-ready Gerbers, and a concise test procedure covering current consumption, thermal performance, and LTE network stability. I will work to ensure the modem boots reliably from a single Li-ion cell, maintains stable voltage during transmit bursts, and achieves the specified low idle current. Give me one opportunity to handle your project. I assure you that I will complete the work with full dedication, accuracy, and professionalism. I am committed to delivering a reliable, high-quality design on time while maintaining clear communication throughout the project. I look forward to discussing your requirements and getting started.
$25 SGD in 40 days
0.0
0.0

Hello, I have previous experience developing an IoT-enabled lithium battery management system for electric bikes. In this project I designed the battery electronics and integrated LTE communication using a SIMCOM cellular module, allowing the battery to communicate directly with cloud services over the Internet. I also worked with Li-ion power management, low-power operation, current monitoring, and ensuring stable operation during cellular transmission peaks. Your project requirements are very similar to challenges I have already solved, and I would be happy to help review and improve the design. Best regards.
$25 SGD in 40 days
0.0
0.0

Hi, if you are interested, we can discuss the details. Bringing a curated shortlist of components into a compact, production-ready, battery-optimized PCB is exactly where my expertise lies. I have extensive experience designing cellular IoT devices and robust power delivery networks (PDN) that handle the intense peak currents typical of LTE transmission bursts...
$25 SGD in 40 days
0.0
0.0

New Delhi, India
Member since Nov 28, 2015
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