The USM-RC-3 sound module is the successor to our proven USM-RC-2 sound module.  The module has been extensively revised, improved and expanded with some functions - and all of this with the same small design of 65 x 43 x 17 mm.

The sound module was specially developed for RC model making in order to equip all types of models with true-to-original and speed-dependent noises, numerous lighting options and additional servo movements.

Due to the extensive setting options, each model can be designed individually and uniquely according to your own ideas.  Over 140 preset projects for trucks, cars, ships, construction vehicles and planes make it easy and quick to get started.

All settings are saved on a micro SD card and can be changed at any time.  All you   need  is a PC, an SD card reader or the  K-USB-2   data cable  and our  USM-RC-3 Sound-Teacher   software  .  The program is compatible with all Windows versions.  With a free emulator such as WineBottler and Wine, the software can also be used with other operating systems.

For a true-to-original sound of the model, sounds can be selected for the following areas:

A loudspeaker with an impedance between 4 and 8 ohms and a power of at least 8 W can be connected to the sound module.  For an optimal sound, we recommend using a loudspeaker housing (resonance body).

The USM-RC-3 has 16 switching outputs to which LEDs, lamps and relays, for example, can be connected to enable various lighting effects.  Light functions such as dipped headlights, reversing lights, brake lights, turn signals, hazard warning lights, flickering lights, etc. can be easily implemented and controlled.  All light functions can be activated or deactivated automatically to match the sound and movement.

8 time-controlled output sequences can be set for automatically running lighting effects.  For each step it can be specified which outputs should be switched on with a certain brightness.  Different party lights, all-round lights and running lights or hazard lights can be implemented easily.

An extra high-current output with 3 A is available for connecting particularly strong consumers (with a high current consumption), such as smoke generators.

The sound module also has an extra output for connecting the IR transmitter diode for the light module LM-IR-16-4   or the Bluetooth transmitter for the light module LM-BT-16-4   .  In this way, the light and servo signals can be transmitted wirelessly to a semitrailer and trailer.

All light and additional functions of the sound module can be activated   via nautic and multiswitch modules   and via the SFR-1 controller   smartphone app being controlled.  The smartphone app can then be used as a graphic "multiswitch module", but it is not possible to control the drive, compared to the SFR series.

With four additional servo outputs, movements such as those of windshield wipers can be easily controlled and adjusted to the sound being played.  Speed ​​controllers can also be connected to the servo outputs in order to control additional motors.

Like its predecessor, the USM-RC-2 sound module has different operating modes.  These become relevant as soon as a standard remote control with a receiver and proportional channels is not used.

In 99% of the applications, digital operation (optionally with speed controller UFR-1230) is used, in which the sound module is connected to the receiver via the proportional channels in parallel to the speed controller.  Here the module receives the information on speed and steering and plays the correct driving sound and switches automatic functions, such as switching the indicators on and off or the hazard warning lights when reversing.

The analog and mixed operation is mainly used with non-standard RC remote control systems or with speed controllers with special functions, such as a cruise control.  The driving speed of the model is taken directly from the drive motor (s).  Various switches or switching modules for controlling the functions can be connected to 4 or 8 switching inputs.

The RC-3 unit comes with:

• 1x Speaker Cable
• 1x 40cm ribbon cable with IDC plug
• 2x 30cm receiver patch cables
• 1x fuse holder for the positive battery connection,
• 1x 32GB micro SD card with standard SD card adapter.