2025-06-03T17:38:24-05:00

Price: 299.95

Electron Smart Box ER-40 Retract Controller. With built in Braking Gyro and Door Sequencer

Designed for the ER40 Sets

The smart choice for those who want more.

Everything that has to do with your landing gear, controlled by one device only. The SmartBox allows full control over your retracts and gear doors. If you want it all, this is your choice.

Easier than ever

Intuitive full color touch screen

Setting up your landing gear has never been easier. Navigate through comprehensive and colorful menus with the touchscreen to configure and adjust your system to suit your needs.

8 protected door outputs

GEAR DOORS, READY TO GO

Synchronize your doors and retracts

Our powerful sequencer allows to set up the retract and door sequence with full control over all aspects. The timings for door opening and closing be adjusted individually for each of the 8 protected door outputs, adding 50 sequencer steps, your imagination is the limit!

And of course, if you would rather use our Linear Actuator instead of a servo motor, you can do that.

Two battery inputs

DIFFERENT VOLTAGES?
NO PROBLEM

Compatibility guaranteed

Electronics evolve, and so do working voltages. And that is why the SmartBox has two battery inputs. If your door servos need a voltage different than your retract, you can use a second battery just for them.

Both battery inputs feature reverse polarity protection, preventing any damages and mishaps that could ruin your day.

Landing perfectly straight

STRAIGHT LANDINGS

Beyond de basics

To keep you on the right path, the SmartBox has the right tools for the job. Differential braking for taildraggers, ABS to avoid wheel blocking and a gyro that will make your landing perfectly straight without any deviations.

Desktop App

ALWAYS UP TO DATE

Don’t miss anything

With the Electron Retracts desktop App, you can easily update your controller with the latest firmware and newest features.

Technical Information:

Weight | 80 g |
Weight with screen | 155 g |
Dimensions | 81 x 61 x 16,5 mm |
Screen dimensions | 78 x 56,5 x 12,4 mm |
Input Voltage BATT 1 | Check the voltage required for your retract |
Input Voltage BATT 2 | Up to 13 V |

Inputs

• GEAR signal input (PWM)
• BRAKE signal input (PWM)
• STEERING signal input (PWM)
• 2x Battery Input (XT-30 male socket)

Outputs

• USB-C port (for PC connection)
• 3x Retract outputs (XT-30 female socket)
• 2x Brake outputs (JR-servo female socket)
• 1x Steering Servo output (JR- servo female socket)
• 8x Door outputs (JR-servo female socket)
• Screen output (USB-C socket)

Max. current per retract output | 7 A (Peak: 10 A) |
Max. current per brake output | 6 A |
Max. current per door output | 5 A |
Steering Servo max. current output | 6 A |
Temperature range | -10°C to +85°C