ElectroDynamics Inc
Electronics and MORE for the Discerning Modeler!
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    EDR-103 Glow Drivers
      Single Cylinders & Twins
    EDR-105 Battery Monitor
    EDR-106 Pro Servo Reverser
EDR-107ADP Kill Switch
    EDR-108 Pow'R Back'R
    EDR-111 Pow'r Bus Pro
    EDR-117 LiteSys
    EDR-122+ Servo-Slo Plus
    EDR-124 BatMon Lite
    EDR-125 Gear Mg'R
    EDR-126 Gear Saver
    EDR-201 Current Probe
    EDR-203 ServoCiser
    EDR-206 Turbine Driver
    EDR-207L NanoTest
      Buffer-Amplifier Interface

    EDR-102 One-Clik
    EDR-103P Glowlite II
    EDR-107ADP Kill Switch
    SANYO eneloop Packs
    EDR-207L NanoTest
      A123 Tester

Ultra Switch II

    ED-Nano A123 Packs
    SANYO eneloop Packs
    Receiver Packs
    Transmitter Packs


    Switch Harnesses
    Amplifying Buffers
    Charge Cords

Festo Fittings


Heat Shrink Tubing

Ultra Precision Valves

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Tech Talk

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Got an "FM" radio and need a "PCM-style" failsafe?

What if you got "hit" by interference and the throttle is stuck or goes crazy??

Install the EDR-119 FM Failsafe or EDR-119P FM Failsafe Plus!
Safely and reliably idle or shut-down that engine.


  • Loss of radio signal or detection of low Rx battery voltage will activate the failsafe function, moving the servo to a pre-programmed position for safety -

  • E-Z, No-Hassle plug-and-play installation , add it in seconds to an existing airplane.
    • Plug in between the Rx and servo on the channel to be failsafed, just like an extension

    • Use it to reliably move the throttle to idle when "hit"

    • Or... use it to set any control surface to a safe "failsafe" position!

  • SMALL and LIGHT!!

  • Super-EZ programming - just use the Tx to move the servo to the desired failsafe position, touch the SET button, and that's it!

    • The EDR-119's remember the preset position, even when the Rx is switched off

    • Re-program at will.

  • LED indicators show Mode - Normal operation or Failsafe activated.

  •  EDR-119P FM Failsafe Plus! adds a LOUD Audible Alarrn for additional features!
    On failsafe activation, the LOUD audible alarm sounds.

    • Use it as a "Switch Off Rx!"reminder
      the audible alarm warns if the Tx is off and the Rx is on.

    • Use it as a "Lost Plane Alarm"
      with the Tx off, the audible alarm helps locate the airplane.

EDR-119 FM Failsafe


  • Operation Voltage: 4.8~6.0v
  • Universal connectors fit all radios
  • Power consumption: 2.3mA (4.8v) / 3.8mA (6.0v)
  • Weight: Approximately 7g
  • Dimensions: 38 x 20 x 9mm


  • Regular: $24.95

Introductory Price

Get yours today!

EDR-119P FM Failsafe Plus!


  • Operation Voltage: 4.8~6.0v
  • Universal connectors fit all radios
  • Power consumption: 2.5mA (4.8v)/4.0mA (6.0v)
  • Alarm Volume:95db @ 10cm
  • Weight: Approximately 7g
  • Dimensions: 40 x 21 x 8.5 mm


  • Regular: $29.95

Introductory Price

Get yours today!

2017 ElectroDynamics, Inc
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Orders: 1-800-337-1638; Info: (734) 422-5420; Fax: (734) 422-5338
31091 Schoolcraft Road; GAZ Commercial Center; Livonia, MI 48150