RadioMaster ER12 PWM Dual-band Gemini & Gemini-X Receiver

Name: RadioMaster ER12 PWM Dual-band Gemini & Gemini-X Receiver
Brand: RadioMaster
SKU: 35864
Price: 89.95 AUD
Availability: OutOfStock

$89.95 AUD

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Out of stock

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Order in H, M, Seconds (before 1pm Sydney time) for same day despatch.

Fast dispatch from Somersby, NSW Easy returns Australian warranty & local support

Pickup availability

1/80 Somersby falls RD, Somersby NSW

Unavailable for pickup

Product details

SKU: 35864

Categories: Drone RC RX Receivers, ELRS Express LRS Receivers & Modules, FPV Antennas, Radio Gear, Radiomaster

Tags: 2.4ghz, ELRS, Receiver

Why buy from Phaser FPV?

Dependable — Phaser started in 2014. Long reputable history and 5 star reviews.
Speed — All stock is in our retail store in Somersby NSW Australia. We ship express today; you often receive tomorrow. Shipping details.
Transparent stock — If it says in stock, we ship today. If we know the ETA, we show it on the product.
Experience — Across our staff you'll find people who fly, build, and use this gear. Not sure what to buy? Call us — we'll help you avoid buying twice.
Free gift on first and recurring orders
Active on social media — tag us or DM us
Large Facebook community for like-minded pilots
GST registered — handy if you need to claim GST (some niche FPV stores are not)

Are you looking to buy RadioMaster ER12 PWM Dual-band Gemini & Gemini-X Receiver in Australia?

The ER12 is designed for larger fixed-wing aircraft that require a higher channel count and robust power handling without unnecessary complexity. Its full-size layout and straightforward integration make it well suited to multi-servo, higher-current installations.

Features

ExpressLRS Performance: Low latency, high reliability, and excellent link quality with flexible configuration options.
Dual-Band Gemini-X RF System (2.4GHz + Sub-G 900MHz): Utilizes both frequency bands to provide enhanced link reliability across a wide range of operating environments.
12 PWM Outputs + Serial Support: Full 12-channel PWM output with dedicated bidirectional UART and serial interfaces for system integration and expansion.
XT30 Dedicated Power Input: Provides stable, high-current power delivery for demanding servo systems and larger aircraft installations.
PWM Signal Amplification: Amplified PWM outputs help maintain signal quality over long servo leads and extension cables. They also improve compatibility with larger, high-torque servos, helping ensure reliable control signal delivery throughout the aircraft.
Independent Multi-Source Voltage Telemetry: Monitor up to three power sources simultaneously using dedicated ADC channels: EXT-V (up to 70V), receiver supply voltage (V-PWM) (up to 12V), and XT30 input voltage (up to 12V).
External UART Port: Dedicated interface for telemetry, external devices, and system expansion.
Wi-Fi Updates & WebUI: Configure settings and perform firmware updates wirelessly without disassembly.
Robust MMCX Antenna Connectors: Secure, serviceable antenna connections for easy maintenance and long-term reliability.
Durable Injection-Molded Housing: Provides consistent protection and structural durability for demanding installations.
Application: Designed as a PWM receiver for large fixed-wing aircraft, especially where multiple servos and higher current loads are involved.
Compatibility: Compatible with all ExpressLRS transmitters and modules, including radios with built-in ELRS.

Built on the ExpressLRS platform and equipped with dual Semtech LR1121 transceivers, the ER12 utilizes a dual-band Gemini X RF architecture operating on both 2.4 GHz and Sub-G 900 MHz. The result is a stable, consistent control link across a wide range of operating environments, with an architecture that prioritizes dependable operation.

The ER12 uses amplified PWM outputs to help maintain reliable servo signals over long leads and extension cables commonly used in larger aircraft. The amplified outputs also help ensure clean and consistent signals when operating larger, high-torque servos that place greater demands on the control system. The receiver also features three independent voltage telemetry channels with dedicated ADCs, allowing simultaneous monitoring of the receiver supply voltage (V-PWM) (up to 12V), the XT30 power input (up to 12V), and an EXT-V input for monitoring external battery voltages up to 70V. Serial connectivity is available via a dedicated 4-pin JST-GH locking UART/CRSF port for telemetry devices and other serial peripherals.

From installation to operation, the ER12 focuses on practicality, with a clean PCB layout to reduce interference, MMCX antenna connectors for easy serviceability, and a durable injection-molded housing built for long-term use.

Important

XT30 Power Input:

The XT30 provides direct battery voltage to the receiver and PWM power rail. Output voltage matches the input voltage. Use only servos rated for the applied voltage. High-voltage systems (2S LiPo/Li-ion) require HV-rated servos. Standard 5V servos must be powered through a regulated 5V supply or the standard servo power input pins.
When using the XT30 to power the receiver and servos, the ESC’s 5V/BEC wire must be disconnected to prevent back-feeding and possible damage.

EXT-V Power Input:

The EXT-V input is accessed through the 2-pin JST-GH connector. Connect the red wire to the positive (+) terminal of the battery or ESC. The ER12 provides independent ADC channels for monitoring V-EXT and V-XT30, allowing it to accurately detect and report the appropriate input voltage for your installation.
Designed for large-scale systems using multiple servos and long wiring runs.