RC ERA C138 Receiver Board Flight Controller with Gyro & Optical Flow Module

Restore Optical Flow Hover, Fix Signal Disconnections, and Eliminate Flight Instability

A burnt, moisture-damaged, or signal-dropping main receiver board on your RC ERA C138 6CH RC Helicopter completely grounds your aircraft. Hard crashes or electrical surges can damage onboard optical flow processing chips and 6-axis gyro sensors, leading to erratic auto-hover drifting, unresponsive servo movement, or complete failure to bind with the transmitter. Installing non-factory flight controllers destroys the pre-calibrated optical flow positioning and altitude hold algorithms. This official RC ERA C138 Receiver Board provides a direct, plug-and-play factory replacement. Pre-loaded with official C138 firmware and micro-connector sockets, it restores rock-solid 2.4GHz signal reception, precise hands-free optical flow hovering, and crisp 6-channel flight responsiveness.  Ships worldwide.

Product Highlights

• Integrated Optical Flow & Altitude Hold Module: Pre-calibrated sensor circuit maintains pinpoint indoor/outdoor hover stability without manual pitch or roll corrections.

• 6-Axis Gyro Auto-Stabilization: Advanced gyro processing delivers instant attitude correction for smooth 6-channel flight handling and precision control.

• Factory Micro Servo & Power Connectors: Features dedicated pre-soldered pin sockets for instant, solder-free connection to main motor leads, tail motor, and servos.

• Compact Lightweight Form Factor: Custom PCB footprint seats perfectly into the internal chassis mounting bay, maintaining exact factory center of gravity.

Compatibility

For the RC ERA C138 6CH RC Helicopter only.
Full model page (specs & photos):
https://kadstoylover.com/en-us/products/rc-era-c138-6ch-rc-helicopter

What’s in the Box

• 1*RC ERA C138 6CH Receiver Mainboard

More Spare Parts & Accessories

Find exact-fit props, wheels, landing gear, servos and more in the dedicated parts collection: 

https://kadstoylover.com/collections/rc-era-c138-helicopter-spare-parts-accessories

Install Tips

• Securing Mainboard in Chassis: Apply thin double-sided foam mounting tape and seat the RC ERA C138 Receiver Board flat and parallel to the helicopter baseplate inside the main chassis frame.

• Connecting Motor & Servo Plugs: Carefully plug the main motor lead, tail motor wire, and micro servo connectors into their corresponding labeled board sockets until fully seated.

• Transmitter Re-Binding Procedure: Turn on your transmitter, insert a fresh 3.7V battery into the C138, and wait for the onboard LED indicator to turn solid, confirming signal bind.

• Pre-Flight Gyro & Optical Flow Test: Place the helicopter on a flat, well-lit surface, perform the transmitter stick gyro calibration sequence, and verify stable optical flow tracking before launch.

Support & Warranty

• 3-month warranty on manufacturing defects
• Ships worldwide