200 kHz OOK RF Link Design - PRICE will very as per Deliverables can be from your side.

@cpp2048

Can you explain why you need such a long wave as carrier signal ? Unless there is specific need this is an impractical choice to use 200KHz as carrier for OOK. Nowadays there are more efficient off the shelf parts available to do just that. More practical aproac to transmit signals over 40 meter, more power efficient, more immune to noise as well as antenna would become small. receiving side of this 200KHz carrier is not a problem, but to reliably transmit on this band needs atleast a loop antenna for transmiter and this requires more energy for single bit transmission. would love to discuss in details.

@hayteekeys

HI, PLEASE READ THROUGH MY PROPOSAL I will deliver a complete, ready-to-build 200 kHz OOK transmitter-receiver pair (separate TX + RX) achieving reliable 40 m open-air range outdoors, with low-power battery operation (>2 days runtime) and temperature-stable performance. MY APPROACH ✅ Design low-power TX using 200 kHz crystal oscillator + MOSFET OOK switch for clean pulse modulation ✅ Build super-regen RX with automatic gain and simple pulse detector (GPIO output) for fast, low-power OOK decoding ✅ Use small whip antennas (15–20 cm) with optimised matching networks for 40 m LOS ✅ Select only in-stock, low-cost parts (LCSC/DigiKey) with wide temp range and humidity tolerance ✅ Add MCU (ATTiny85 or similar) for clean pulse generation/decoding and low-power sleep modes ✅ Provide full KiCad schematic + PCB layout, BOM, firmware snippets, tuning guide and bench verification data DELIVERABLES - Complete KiCad files + Gerbers for both boards - BOM with stock links and assembly notes - Firmware snippets (Arduino/ATTiny) - Short tuning & range test guide + verification photos/screenshots QUESTIONS 1. Target battery type and capacity (e.g. 18650, CR123, LiPo)? 2. Exact OOK pulse width and repetition rate you need? 3. Any maximum size limit for TX or RX PCB? 4. When can you start and what is your target deadline? Ready to start immediately

@tshibsamuel477

Hi there, I’ve carefully read your project description and I fully understand the requirements: designing a matched 200 kHz transmitter and receiver pair for reliable outdoor OOK pulse detection, battery-powered operation, and stable performance over at least 40 meters line of sight. With my background in mechatronics and embedded electronics, I have solid experience in RF-related hardware design, low-power embedded systems, analog signal conditioning, PCB design, and practical outdoor electronic systems. I can design both the TX and RX sections, select sensible in-stock components, and provide the supporting firmware snippets needed for clean pulse generation and detection. I can deliver the full schematic, PCB layout, BOM, native design files, and a concise tuning and test guide so the system is practical to reproduce and verify. My focus will be on stability, repeatability, battery efficiency, and real-world robustness. Given my experience, I’m confident I can handle this efficiently and professionally. Just send me a message and we can get started right away. Best regards, Samuel Tshibangu

@cesur135

With my extensive experience in the fields of industrial automation, including electrical and electronic systems, I am ready to bring my skills over to your RF project. I understand the unique demands your project presents and believe I can rise to the challenge. I have ample experience in circuit-level design, firmware development, and even creating a test setup that meets specific needs. My familiarity with tools like KiCad and EPlan P8 will ensure smooth design file handovers as per your preferred format. My proficiency with enclosures that can withstand various environmental conditions could prove invaluable. I have designed systems that effectively dealt with temperature swings, sunlight, and moisture without compromising on functionality. Moreover, my skill set extends to point-to-point tests as well as quality assurance measures to ensure stability, sensitivity, and performance within specific ranges—in line with your request for validated carrier frequencies and accepted range threshold. Considering the complexity of your project and time constraint at hand, it's essential to tap into proven expertise for a successful implementation and completion. My track record in RF-oriented work includes fabricating transmitter-receiver pairs that catered to unique requirements like yours. My past experiences mirror the challenge at hand—often emerging victoriously through solving complex equations which demanded not just technical know-how but resourcefulness too.

@nichitav7

Hello I will design a robust 200 kHz OOK RF link optimized for outdoor stability and reliable 40 m performance using a proven low-frequency architecture. Confirmations: -Stable 200 kHz carrier (±1 kHz) using crystal-referenced or calibrated LC design -Reliable 40 m LOS with small whip antennas (impedance matched) -Clean OOK generation (TX) + noise-resilient detection (RX) -Outdoor-ready: temperature drift mitigation, moisture-tolerant layout -Battery operation ≥ 48 hours (low-power design + duty optimization) Technical Approach: -TX: Low-power oscillator + buffered PA stage, fast OOK gating -RX: High-sensitivity super-heterodyne (preferred over super-regen for stability) -Narrowband filtering + envelope detection + comparator for clean GPIO output -Careful antenna matching + ground strategy for LF efficiency Deliverables: -Schematics + PCB (Altium & KiCad) -BOM with in-stock, cost-optimized components -Gerber + STEP files -MCU snippets (OOK generation + pulse decoding) -Tuning & validation guide (bench setup, measurement steps) -Proof: frequency capture + range test results Scope Notes: -Pulse detection validated for 0.1 ms – 10 ms -Design focused on repeatability, not one-off tuning -Iteration included if initial range target needs refinement Let’s align on battery constraints and enclosure size—I can start immediately. Best regards, Nichita.

@Karuri101

I would be honored to develop this robust 200 kHz OOK system for you. With extensive experience in low-frequency RF design, I will deliver a high-stability transmitter and a high-sensitivity receiver (utilizing a discrete superheterodyne architecture for superior selectivity outdoors) capable of exceeding the 40 m range requirement using compact whip antennas. My solution focuses on thermal stability by utilizing C0G/NP0 capacitors and a precision crystal-based or MEMS oscillator to ensure the carrier remains within the $\pm 1 \text{ kHz}$ tolerance despite sunlight or temperature swings. I will provide a comprehensive package including KiCad design files, a BOM with active stock from major distributors, and lightweight MCU snippets for pulse handling, all while optimizing power consumption to guarantee a 48-hour battery runtime. I can provide spectrum snapshots and range verification logs immediately upon prototype completion to ensure a quick and successful project hand-off.

@Ryan15222

Hi, I’m very interested in your 200 kHz TX/RX project. I have solid experience in RF, analog front-end design, and battery-powered embedded systems, and can deliver a stable, low-frequency solution tailored to your requirements. I understand you need a matched transmitter and receiver operating at 200 kHz (±1 kHz), capable of reliable OOK detection (0.1 ms–10 ms pulses) over at least 40 m outdoors, with low power consumption and compact antennas. My approach: • TX: Stable carrier generation (crystal or precision timer) with clean OOK switching and efficient output stage • RX: Superheterodyne architecture for high sensitivity and noise immunity, with band-pass filtering and clean envelope detection • Antenna: Compact whip with proper matching for maximum efficiency at low frequency • Power: Optimized for ≥2 days battery operation • Robustness: Components and layout selected for temperature stability and outdoor use Deliverables: • Schematics + PCB (KiCad), Gerbers, BOM (in-stock parts) • Firmware snippets for OOK generation/detection • Frequency verification (measurement proof) • Test & tuning guide + build notes I can start immediately and will provide clear, testable results matching your acceptance criteria. Best regards,

@engrhasan01

Hi,Are you looking for a stable, low-frequency RF link that reliably transmits and detects clean OOK pulses over 40 m in outdoor conditions?I am an Electrical & RF Design Engineer with 5+ years of experience in low-frequency communication systems, analog front-end design, and PCB development. I have worked on custom TX/RX links, oscillators, and sensitive receiver architectures, ensuring stability under environmental variations. For your 200 kHz system, I will design a low-power transmitter with a stable carrier (±1 kHz) and a high-sensitivity receiver (super-het preferred for reliability) optimized for OOK detection. The design will include efficient antenna matching for compact whips, low-noise amplification, and filtering to ensure clean pulse recovery across 0.1–10 ms ranges. Battery life will be optimized for 2+ days continuous operation. Deliverables: • Complete schematics & PCB layouts (KiCad + Gerbers) • Verified BOM with in-stock components • TX/RX firmware snippets (OOK generation & detection) • Test & tuning guide with measurement validation • Build notes for repeatable results Timeline: 5–7 days (including testing & documentation).I’m ready to start immediately and can share similar RF design experience if needed. Best regards, Hasan