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5″ FPV Drone Build On Budget 2024
Here's an in-depth guide to crafting the most economical yet high-performance 5-inch FPV drone in 2024, coupled with recommendations for budget-friendly radio gear, LiPo chargers, and FPV goggles to round out your setup.
Assuming you’ve got the necessary tools on hand, building the cheapest 5″ drone with decent performance will set you back around $304.
For essential equipment like the radio, goggles, and charger, you’re looking at an additional $150. To put things in perspective, that’s a pretty solid deal. Take, for instance, the BetaFPV’s FPV drone kit, which is a basic kit featuring a small 2S tiny whoop—it already costs around $300. This budget-friendly setup will be a reliable companion for quite some time before you even think about an upgrade.
Building the 5'' FPV Drone
Frame: Consider the Source One V5 frame, priced at $29.99, known for its affordability, durability, and versatility. Its open-source design allows for extensive customization with various 3D printed components, catering to diverse preferences and flight styles. The spacious layout ensures easy installation and maintenance of components, making it suitable for beginners and experienced builders alike.
Flight Controller and ESC Stack: Explore the MEPS ESC and FC stack, priced around $120-$140, acclaimed for its stellar performance and reliability.Especially for MEPS 60A and MEPS F7 HD, the price is about $136. Alternatively, the MEPS f722 mini flight controller and MEPS 45A Stack offers similar performance and reliability, it is the best esc for drone.
Motors: For budget-conscious builders, consider the Velox V2207 V2/V3 and Emax ECO II motors, ranging from $14.9 to $15.99 each. These motors strike a balance between cost-effectiveness and performance, suitable for various flying styles such as freestyle, racing, and cinematography. Their sturdy construction ensures longevity and dependable operation.
Video Transmitter: Opt for the Flywoo GOKU HM600 VTX, priced at $19.99, boasting a feature-rich design ideal for budget builds. Its compact form factor and wide input voltage range ensure compatibility with different setups. With a power output of up to 600mW, it guarantees reliable video transmission over extended distances, perfect for both leisurely flights and competitive racing.
FPV Camera: Invest in the Foxeer Razer Micro, priced at $17.99, renowned for its exceptional image quality and affordability. With its crisp and clear video footage, this camera delivers an immersive FPV experience, capturing every moment with precision. Alternatively, consider upgrading to the Runcam Phoenix 2 Special Edition at $24.99 for superior image quality and enhanced performance in challenging lighting conditions.
Radio Receiver: For reliable signal reception and stability, opt for the BetaFPV ELRS Lite tower antenna version, priced at $11.99. Its compact design and robust construction make it suitable for various FPV applications, ensuring smooth and responsive control during flights. With easy setup and compatibility with a wide range of transmitters, it provides pilots of all skill levels with a seamless flying experience.
LiPo Battery: Select high-quality LiPo batteries from reputable brands like CNHL and RDQ to optimize performance and reliability. Aim for 6S batteries in the 1100mAh to 1300mAh range to strike a balance between flight time and power output. While platforms like AliExpress may offer tempting deals, prioritize safety and quality to avoid potential issues during flights.
Propellers: Experiment with different propeller brands and types to fine-tune your drone's performance. While basic propeller sets typically cost $3-$4, investing in high-quality propellers from trusted brands like HQProp, Gemfan, and Dalprop can significantly enhance flight characteristics such as agility, efficiency, and stability. Consider factors like material, pitch, and blade count to find the optimal propeller configuration for your build and flying style.
Budget FPV Equipment:
Radio: Consider the Radiomaster Pocket at $64 for its essential features and affordability. Its compact design and user-friendly interface make it suitable for both beginners and experienced pilots. With compatibility with ExpressLRS receivers, it offers reliable control and customization options, ensuring an enjoyable FPV flying experience.
FPV Goggles: Opt for the EV800D goggles, available for approximately $100-$120, for their reliable performance and affordability. Equipped with features such as a built-in DVR and adjustable focal length, they offer an immersive FPV experience without breaking the bank. With a comfortable fit and wide field of view, they provide pilots with clear and vivid visuals, enhancing navigation and maneuverability during flights.
Charger: Invest in a reliable LiPo charger like the SkyRC B6Neo at $26 for efficient battery maintenance and charging. With multiple charging modes and safety features, it ensures the longevity and safety of your LiPo batteries. Alternatively, consider the iSDT 608AC charger, available for approximately $64.99, for its compact design and versatile charging capabilities. Whether you're at home or in the field, it provides convenient and reliable charging solutions for your FPV batteries.
By meticulously selecting each component and considering budget-friendly options, you can build a high-performance 5-inch FPV drone without exceeding your budget. Whether you're a novice exploring the world of FPV flying or a seasoned pilot seeking a cost-effective setup, this guide equips you with everything needed to embark on an exhilarating FPV journey.
Continue readingIntroduction
Within the realm of drone technology, a plethora of flight controllers (FC) and electronic speed controllers (ESC) are available, catering to both performance-oriented and budget-conscious enthusiasts. This review aims to compare four budget-friendly FC/ESC stacks, evaluating their features, value propositions, and suitability for various flying styles.
SpeedyBee F405 V4 Flight Controller
Value Proposition: The SpeedyBee F405 V4 emerges as a leading contender in the budget segment, offering exceptional value at $69.99. This stack integrates a feature-rich flight controller with an upgraded 4-in-1 ESC, delivering performance on par with higher-priced alternatives while remaining affordable.
Design and Build Quality: While retaining the signature features of its predecessor, the V4 introduces significant enhancements, including an aluminum alloy heatsink in the ESC for enhanced cooling and durability. Despite a marginal increase in weight, the overall design maintains user-friendliness, featuring large solder pads for simplified installation.
Enhanced 4in1 ESC: The upgraded 4-in-1 ESC boasts a higher current rating of 55A and improved heat management capabilities, ensuring dependable performance during demanding flights. Additional enhancements, such as a built-in TVS diode for surge protection and a thicker copper layer PCB, enhance durability and heat dissipation.
GEPRC Taker F405 50A FC/ESC Stack
Value Proposition: Priced at $64, the GEPRC Taker F405 offers competitive features at a slightly lower cost compared to the SpeedyBee F405 V4. With a similar processor, gyro, and connectivity options, it presents an appealing option for budget-conscious enthusiasts.
Design and Connectivity: Featuring a versatile design with both solder pads and connectors, the Taker F405 caters to varied installation preferences. Inclusion of connectors for various peripherals, such as HD VTX's and GPS modules, enhances compatibility with diverse drone builds.
Performance Considerations: While delivering comparable performance to the SpeedyBee F405 V4, the Taker F405 features a slightly lower-rated BEC and lacks Bluetooth connectivity, which may be a factor for users preferring wireless configuration options.
MEPS 45A ESC and Micro Quadcopter Flight Controller
Performance: The MEPS 45A ESC and F7 Mini Micro Quadcopter Flight Controller offer exceptional flight performance, characterized by robust power output and precise control. Advanced sensor technology and customizable firmware enable smooth and stable flight characteristics, suitable for a wide range of flying styles. It is regarded as one of the best 20x20 ESC options.
Usability: Installation and setup of the MEPS 45A ESC and Flight Controller are straightforward, facilitated by their compact form factor and comprehensive documentation. Compatibility with popular flight control software platforms allows for extensive customization, catering to the needs of both novice and experienced pilots.
MEPS 60A ESC and MEPS F7 FC
Versatility: The MEPS 60A ESC and MEPS F7 FC offer unparalleled versatility, accommodating diverse flying styles and preferences. With support for multiple flight modes and extensive customization options, this stack empowers pilots to tailor their drone's performance to suit their unique requirements, from freestyle maneuvers to aerial photography missions. It is among the standout products from MEPS electronic speed control.
In summary, each of the reviewed FC/ESC stacks presents unique value propositions, addressing varying budget constraints and flying preferences. Whether prioritizing affordability, versatility, or performance, there exists a suitable option for drone enthusiasts looking to enhance their aerial experience without exceeding their budget. These selections encompass some of the best drone ESC and FPV flight controller with gps options.
Unlocking the skies with micro FPV drones demands precision, reliability, and innovation, all encapsulated within the heartbeat of the craft: the flight controller. Let's explore the realm of these miniature marvels and delve into the essential considerations for choosing the perfect 1S flight controller.
Exploring AIO Flight Controllers
AIO (All-In-One) flight controllers emerge as the indispensable nucleus of micro FPV drones, orchestrating the symphony of flight with seamless integration. By melding the pivotal components - flight controller, video transmitter (VTX), and power distribution board - into a singular, compact entity, AIO boards revolutionize drone assembly. Beyond mere consolidation, they empower pilots with features like overcurrent protection, voltage monitoring, and integrated receivers, fostering versatility and ease of use.
Factors to Consider in Choosing the Best 1S Flight Controller
In the labyrinth of 1S flight controllers, discerning pilots navigate a myriad of factors to unearth their ideal match:
- Reliability: Amidst the tumultuous skies, reliability reigns supreme. The chosen flight controller must weather the storm of crashes and turbulence, emerging unscathed to ensure uninterrupted flight bliss.
- Weight Optimization: In the weight-conscious world of micro FPV, every gram counts. Selecting a lightweight controller injects agility into the craft's DNA, enhancing maneuverability and extending flight durations.
- Integration Prowess: Streamlined builds beckon with integrated functionalities. Flight controllers boasting integrated components such as SPI receivers, VTXs, and OSDs pave the way for clutter-free installations, optimizing space and simplifying wiring.
- Functionality Fusion: Tailoring functionality to match individual flying styles elevates the FPV experience. Whether craving advanced flight modes, telemetry support, or customizable LED outputs, the chosen controller serves as a conduit for aerial ambitions.
Best AIO Flight Controller
Exploring the Flight Controller Pantheon: Amidst the celestial expanse of flight controllers, several stellar options beckon to micro FPV enthusiasts:
MEPS 1S AIO Flight Controller for Racing Whoops: Engineered for the adrenaline-fueled realm of 1S racing whoops and long-range explorations, this controller boasts a 32-bit ESC chip and a plethora of adjustable parameters, setting the stage for thrilling flights.
MEPS F4 Drone Flight Controller for Micro: Ascending to the zenith of 1S ESC technology, this integrated marvel blends a 4IN1 ESC, SPI ELRS 2.4G receiver, Analog VTX OSD, and 25/50mW Analog VTX into a compact package, simplifying setups and ensuring flawless FPV escapades.
iFlight SusseX Whoop 1S: Embarking on a journey of integration and simplicity, the SusseX Whoop 1S merges flight controller, ESC, and VTX functionalities into a harmonious whole, captivating micro FPV enthusiasts with its streamlined design and impeccable performance.
Happymodel Diamond F4: Crafting a diamond amidst the micro FPV landscape, the Diamond F4 fuses flight controller, ESC, receiver, and video transmitter capabilities into a featherweight masterpiece, unlocking boundless skies for intrepid pilots.
In Conclusion: As micro FPV enthusiasts ascend to new heights, the choice of flight controller emerges as a pivotal decision, dictating the trajectory of aerial adventures. Besides the MEPS AIO, MEPS has other models of flight controllers such as the f722 mini flight controller. Whether entrusting their skies to MEPS, iFlight, or Happymodel, pilots embark on a journey fueled by innovation, reliability, and boundless possibilities.
Understanding the Core of AIO Flight Controller
In the realm of FPV drones, an AIO (All-in-One) flight controller reigns supreme, acting as a centralized hub integrating crucial components essential for drone control. These components include:
- Flight Controller (FC): Acting as the brain of the drone, the FC processes sensor data to stabilize the craft and execute flight commands.
- Electronic Speed Controllers (ESCs): These modules regulate motor speed and power delivery, ensuring smooth and controlled flight.
- On-Screen Display (OSD): Providing real-time flight data such as battery voltage and altitude on the pilot's FPV feed, enhancing situational awareness.
- Receiver: Facilitating communication between the pilot's radio transmitter and the FC, allowing precise control over the drone.
Advantages Offered by AIO Flight Controllers
The utilization of AIO flight controllers brings forth a myriad of benefits:
- Streamlined Build: By consolidating multiple components onto a single board, AIOs simplify the drone build process, reducing overall complexity.
- Weight Optimization: AIOs contribute to weight reduction, improving the drone's agility and flight performance.
- Compact Design: Ideal for micro and mini FPV drones where space is limited, AIOs offer a compact form factor without sacrificing functionality.
- Enhanced Aesthetics: AIOs contribute to a clean and organized build layout, enhancing the visual appeal of the drone.
Considerations When Using AIO Flight Controllers
Despite their advantages, AIO micro flight controller has certain limitations:
- Limited Upgrade Options: AIO boards may limit the ability to upgrade individual components, potentially restricting customization.
- Reduced Flexibility: Compared to separate components, AIOs offer less flexibility in component selection, limiting customization options.
- Troubleshooting Complexity: Troubleshooting issues with AIOs may be more challenging, as it often involves diagnosing and replacing the entire board.
Compatible Drone Sizes
AIO flight controllers cater to a range of drone sizes, including:
- Tiny Whoops: Designed for small and lightweight drones, Tiny Whoop-compatible AIOs typically feature compact form factors such as 16x16mm or 20x20mm.
- Toothpicks: Suited for slightly larger drones, Toothpick-compatible AIOs may utilize 20x20mm or 25x25mm configurations.
- Micro Quadcopters: Targeting medium-sized drones, Micro Quad-compatible AIOs often come in 25x25mm or 30x30mm sizes.
- Mini Quadcopters: Designed for larger drones, Mini Quad-compatible AIOs may feature standard 30x30mm or full-size configurations.
When selecting an AIO flight controller, it's essential to consider compatibility with the drone's frame size and mounting options.
Tips for Choosing the Best AIO Flight Controller
When choosing a flight controller for drone, consider factors such as:
- Size and Weight: Opt for a compact and lightweight controller to ensure compatibility with the Tiny Whoop frame and maximize flight performance.
- Features vs. Price: Balance the desired features with your budgetary constraints, ensuring that the chosen flight controller meets your needs without overspending.
In conclusion, selecting the perfect AIO flight controller involves careful consideration of compatibility, size, weight, features, and price, ensuring optimal performance and functionality for your FPV drone.
In this comprehensive guide, we will delve into the intricacies of connecting, configuring, and flashing BLHeli ESC, providing detailed instructions and additional insights to optimize your drone's performance.
Downloading BLHeliSuite_32 Software
To begin, navigate to the official repository and download the latest version of BLHeliSuite32. Ensure that you select the appropriate version tailored for BLHeli_32 ESCs. This software serves as the key to unlocking the full potential of your BLHeli ESC. You can find the download link in the "READ ME" section at the bottom of the BLHeliSuite32 page.
Understanding BLHeli_32 4in1 ESC
Before delving into the technical details, it is crucial to understand the significance of BLHeli_32 ESCs. Unlike their predecessors, BLHeli_32 ESCs offer enhanced performance, smoother operation, and advanced features such as telemetry support and bidirectional DShot communication.
Connecting ESC to FC
Begin by establishing a physical connection between the ESCs and the flight controller (FC). Keep the ESCs plugged into the FC, connect a LiPo battery to power them, and attach the USB cable to the FC. This setup enables the FC to serve as a conduit for accessing and configuring the ESCs.
Configuring ESCs in BLHeliSuite32
Prioritize safety by removing propellers before proceeding. Power up the ESCs with a LiPo battery and connect the USB cable to the FC. Launch BLHeliSuite32 and navigate to the "BLHeli32 Bootloader (Betaflight/Cleanflight)" interface. Select the appropriate COM port for your flight controller and establish a connection.
Once connected, explore the myriad of settings available in BLHeliSuite32. From motor timing to PWM frequency, fine-tune each parameter to align with your drone's specific requirements and flight characteristics.
Advanced Configuration
Delve deeper into the intricacies of ESC configuration by experimenting with advanced settings. Adjust parameters such as demag compensation and motor direction to achieve optimal performance and efficiency. Maintain detailed records of your configurations and monitor their impact on flight dynamics.
Flashing BLHeli_32 Firmware on ESCs
Before proceeding with firmware flashing, ensure that your computer is connected to the internet for firmware validation. Connect a fully charged LiPo battery, plug in the USB cable to the FC, and select the appropriate COM port. Use BLHeliSuite32 to read the ESC setup and verify firmware versions.
Initiate the flashing process, ensuring to confirm each step meticulously. Avoid disconnecting the battery during flashing, as it may result in irreversible damage to the ESCs. Once complete, verify the firmware versions and write settings to the ESCs if necessary.
Recommendations
Consider investing in high-quality components such as the MEPS F7 HD flight controller and MEPS 60A ESC for optimal compatibility and performance. These components are renowned for their reliability and seamless integration with BLHeli_32 ESCs. Prioritize safety at all times by adhering to best practices such as propeller removal and using a smoke stopper during initial power-up. Regularly inspect and maintain your drone's components to ensure continued functionality and safety. They are the best quad flight controller and the best 6s esc.
By following these comprehensive steps and recommendations, you'll be well-equipped to unlock the full potential of BLHeli_32 ESCs, enhancing your drone flying experience to new heights.
Understanding Whoop FCs:
The Whoop flight controller boasts a 25.5×25.5mm mounting pattern. Commonly referred to as AIO FC, this single board integrates ESC, FC, and OSD. For weight-conscious enthusiasts, there are options with integrated radio receivers and VTX, with a recommended 45-degree rotation during installation.
Decoding Toothpick FCs:
Toothpicks, a distinct category of ultralight fixed-point video drones, feature slender, toothpick-like limbs. While Whoop style FCs were initially integrated into Toothpick setups, manufacturers have honed a specific FC for toothpick constructions. The mounting pattern matches that of Whoop FC (25.5×25.5mm), often slightly larger for additional solder pads. Notably, Toothpick FCs boast stronger ESCs, supporting up to 55A (6S).
Unveiling Mounting Patterns:
The official mounting pattern is 1 inch (25.4mm), but variations like 25.5mm, 26.0mm, or even 26.5mm exist due to a lack of standardization. Although the differences are negligible, adhering to 25.5mm is recommended to avoid surprises during frame installation.
Strategizing the Best Flight Controller Selection:
To streamline FC selection, consider specific criteria tailored to your build:
- Frame compatibility: Whoops or toothpick frames
- LiPo voltage support
- ESC current rating
- Motor connections: Direct solder or "plug and play"
- Integrated receiver and VTX
- Additional UART for peripherals like DJI Air Unit, Vista, GPS, etc.
Showcasing the Best All in One Flight Controller:
-
iFlight BLITZ F411 1S 5A AIO:
iFlight's Blitz F411 1S 5A flight controller, designed for little whoops, integrates VTX and a radio receiver (FrSky D8 or ELRS). The ELRS variant includes a built-in ceramic tower antenna, and the VTX output power ranges from 25/50mW. The board weighs 4.4g excluding the VTX antenna. -
BetaFPV F4 AIO 2-4S V3 (12A / 20A):
Tailored for 75mm, 85mm, and 95mm whoop frames, this board supports up to 4S LiPo. Despite its 26x26mm mounting, it can be adapted to a 65mm frame. Noteworthy is the absence of an integrated RX, necessitating external connections. The additional weight of an external RX has minimal impact on brushless whoops.
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MEPS AIO Flight Controller F411 15A:
Specifically crafted for 1S racing whoops and 1S long-range toothpicks, this FC incorporates a 32-bit ESC chip for swift response and customizable parameters. Features include small current plugging, high current soldering, and a plug-in motor plug, eliminating the need for welding. Recommendations include FPV Motor SZ0802 and FPV Propellers SZ1218, making it an exemplary choice for the best 1S esc&FC configurations.
Selecting the ideal flight controller for your FPV quadcopter can be a challenging task given the plethora of options available. Each controller offers unique features, and technological advancements have led to more powerful micro-controllers for enhanced optimization. This guide aims to simplify the process of choosing a flight controller tailored to your needs. Additionally, we'll highlight noteworthy offerings from MEPSKING, such as the MEPS F7 and MEPS 2306, which can benefit your FPV drone endeavors. Let's delve into the ESC landscape.
- What are the Quadcopter Flight Controllers?
Physically, a flight controller is a circuit board with electronic chips—a counterpart to a laptop's motherboard and processor. It serves as the drone's brain, housing intelligent electronics and software that monitor and control all drone operations. Flight controllers vary in size and complexity, much like the brains of different organisms.
- Flight Controller Processors
F1, F3, F4, and F7 are commonly used processors in mini quads. Advancements led to higher processing speeds, with F7 being the latest and fastest, capable of executing 216 million cycles per second. This increased speed enhances the controller's ability to execute commands swiftly.
Processor |
Operating Frequency |
---|---|
F1 | 72 (MHz) |
F3 | 72 (MHz) |
F4 | 168 (MHz) |
F7 | 216 (MHz) |
- Firmware
Various firmware options like Betaflight, Cleanflight, Raceflight, and KISS cater to specific functions. Betaflight, being open-source, boasts a large user base and a wide range of flight controllers. KISS, a closed-source firmware, limits users to proprietary flight controllers. iNav is suitable for those interested in automated flying and GPS waypoint missions.
- How to Choose the best Flight Controllers for Quadcopter?
Whether you're a novice or an experienced pilot, consider the following when selecting a flight controller:
- Size and Mounting Pattern: Ensure the controller fits your drone's frame and mounting pattern.
- Features: Assess if you need features like a built-in OSD, black box, or additional modules like SpeedyBee Bluetooth/WIFI tuning.
- Performance: Opt for a controller with a fast processor (F4 or F7) and reliable sensors for improved flight performance.
- Peripherals: Consider the number of available peripheral plugs for devices like video transmitters, receivers, buzzers, LEDs, etc.
- Pad Layout: A well-designed pad layout simplifies cable management, and some controllers offer plug-and-play ports for convenience.
- Customer Support: Choose a brand with reliable customer support, especially crucial for beginners.
Keeping these factors in mind will help you make an informed decision when choosing the right flight controller for your drone.
We'll go over the foundations of Electronic Speed Controllers (ESCs) and their important function in First Person View (FPV) drones in this article. This thorough summary seeks to offer crucial details on voltage and current ratings, the benefits of various ESC kinds, and an ESC's internal construction. We'll also highlight some notable MEPSKING items that you could find useful for your FPV drone, including the MEPS ESC. Now let's explore the realm of ESCs.
MEPSKING is a well-known brand in the industry, specializing in 6S brushless motor, FPV drone ESCs, and drone flight controllers with sixteen years of experience in UAV propulsion systems. Establishing a recreational e-commerce platform with an emphasis on FPV propulsion technology advancement is their objective.
1. Recognizing ESCs
An FPV drone's ability to control motor speed is mostly dependent on its ESC, or electronic speed controller. In order to operate the brushless motor and reach the intended speed, it decodes throttle signals from the flight controller. Considering all the variables that affect performance, choosing ESCs of superior quality improves the whole flying experience. Direct current (DC) from the LiPo battery powers ESCs, which then take motor instructions from the flight controller and convert them into three-phase alternating current to power the motor.
2. Types of ESCs
The 4-in-1 ESC and the single ESC are the two main categories of ESCs. Four distinct ESCs, each controlling a different motor, are combined into a single circuit board to form a 4-in-1 ESC. 4-in-1 ESCs, which often match the size of the flight controller, make it simple to stack and install quickly with fewer solder connections, which minimizes the amount of wiring and soldering that is required. The ease of 4-in-1 ESCs is undeniable, but it's important to remember that if one ESC breaks, the entire board needs to be replaced. Nevertheless, the tremendous reliability of contemporary 4-in-1 ESCs reduces worries about these kinds of incidents. In the past, single ESCs—which regulate just one motor—were more common; but, lately, their use has decreased. Noteworthy products from MEPSKING, such as the MEPS 45A and the MEPS 60A ESC, are popular choices available in their store.
3. Establishing the Needs for the ESC
Make sure the ESC you choose for your FPV drone can manage the current draw from your chosen motor and propeller and is compatible with the voltage of your battery.
3.1 Ratings for Voltage
To avoid damage, be sure the ESCs you have chosen can handle the voltage of your battery. ESCs can handle input voltages as low as 6S, where 6S and 4S stand for the number of cells in your LiPo battery.
3.2 Present Assessments
The maximum current an ESC can handle without breaking is indicated by its ESC current rating, which is expressed in amps. The amp rating can only be too low; it cannot be too high. At the moment, there are two rating types: burst and continuous. Burst current specifies the maximum current for brief intervals, usually less than 10 seconds, whereas continuous current indicates the sustained current the ESC can safely take.
4. Choosing ESC Firmware
Since there is not much of a performance difference between BLHeli_S and BLHeli_32, any option is acceptable. Bi-directional DShot is now supported by both firmware versions, allowing RPM filtering in Betaflight. Even though BLHeli_S ESCs are more affordable, they may require more work to enable RPM filtering because doing so may require flashing third-party firmware (like Bluejay). By comparison, BLHeli_32 functions flawlessly right out of the box. The more recent model, BLHeli_32, has more sophisticated features like RGB LED support and ESC telemetry, however these features don't really affect flight performance. If you want an ESC that is more future-proof, go with BLHeli_32; if cost is a factor, go with BLHeli_S.