About Remote Controls


GAMA Electronics RF transmitters and receivers are designed to provide solutions for your toughest remote control applications. Operating in the 340MHz, 433MHz and 940MHz UHF frequency bands these low power transmitters and receivers are typically used for remote control of AC & DC motors, hoist/lift controls and lighting devices. The FCC requires all RF transmitters to be tested and certified to their stringent standards. Our transmitters have been FCC certified for unlicensed operation. Most applications for our devices are custom in nature due to unique requirements requested by individual customers. We have, however, designed the basic products so they can be modified quickly and inexpensively to provide a variety of custom options. A number of standard transmitter/receivers incorporating the most popular features are available from stock.

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Features:

  • FCC Certified: No user license required
  • Typical transmission range 100 feet to 1 mile
  • Secure Encoding
  • Addressable
  • AC/DC Designs
  • High Current Motor Controls
  • Custom and standard designs available




RF Receivers

GAMA RF remote control receivers are microprocessor controlled, radio frequency devices designed for industrial and commercial applications. The enclosed parts, encased in epoxy resin, are constructed to withstand at least IP64 operating conditions. However, external wiring and terminals must be protected.

  • Multifunction designs
  • Standard off-the-shelf products
  • Momentary, latching, and reversing functions
  • Digitally encoded messaging
  • Addressable
  • Indoor and outdoor designs
  • FCC approved
  • Ranges up to 500 feet

RF signals are amplified and demodulated by either a 340MHz, 433MHz or 900MHz receiver. Signals are routed as a serial data stream to the logic control section. Communication and control logic is handled by an on-board micro-processor. Our talented engineering staff write their own software using assembly language. Although more difficult and time consuming than higher level languages, firmware written in assembly language produces lightning fast, reliable response to user input.

Output power is connected to loads through electromechanical relays. Relays may be isolated or non-isolated depending on the model you order. In an isolated configuration, power must be supplied from an external source. This is appropriate if you want to control an AC motor using a DC powered receiver, for instance. In the non-isolated configuration power to the load(s) comes from the same source that powers the receiver, thereby minimizing wiring cost.

Most GAMA RF receivers occupy a footprint smaller than 5x8 inches and are suitable for external mounting or installation inside a non-metallic enclosure. Standard packaging includes generic ABS molded box with cord connector and integral antenna. Options such as those found in our long-range RF receivers, provide for installation in metallic enclosures by placing the antenna outside the box.

Leveraging existing designs is a rational approach to custom manufacturing, and our RF receivers are a good example. We've invested years of research and development in the hardware and software features that place our RF remote control products at the top of the list. Three categories define our RF receiver family: standard, long-range and extended-range.




Standard

Standard receivers operate in the 340MHz band. Our 340MHz transmitters use on-off keying (OOK) sometimes called amplitude shift keying (ASK). This is the same type of modulation used for over a century to transmit Morse code and is common in present day remote applications such as garage door openers. This radio technology offers good range performance, high efficiency and a cost effective, proven design. Available in standard off-the-shelf configurations. Also suitable as custom integration components.




Long Range

Long range receivers operate in the 340MHz band, use on-off keying, and have better range performance than our standard models thanks to placement of an external antenna. The external antenna's design provides additional gain and is removed from the inherent interference generated by the receiver's own electronics. This simple cost effective enhancement is available in several standard off-the-shelf products and, as always, a custom component.




Typical Range Performance

The FCC regulates the power of all RF transmitters. Our transmitters fall into the category of "Low Power Transmitters". Because of their limited range, no user license is required for operation.

Range performance of a transmitter/receiver pair will vary depending on the specific application. As the transmitter sends a data stream to the receiver when a button is pressed, the receiver must receive a pre-determined data pattern before it responds to the command. If erroneous data is received, the receiver ignores the command. Thus, the shorter and simpler the data stream, the more likely it will be received correctly. As the data stream becomes longer and more complicated, error probability increases. Other factors include multiple transmitters operating in the same area and RF interference from electrical equipment. The greater the distance between receiver and transmitter, the weaker the signal becomes and the greater the likelihood that noise or interference will prevent a valid signal from being received. Another factor that will affect range is the location of the receiver. For example, if the receiver is located inside a closed steel building or enclosure and the transmitter is outside.

The type of control required also is a factor in range. A typical garage door opener uses a single pulse to activate the receiver. Limit switches then determine direction and duration of travel. This type of control is called intermittent duty. A continuous duty signal is one where a switch on the transmitter must be pressed continuously during the entire duration of an operation. It is much easier to transmit a single intermittent pulse to a receiver and thus the range will be much greater for this type of transmission. Typical transmission range will be in the area of 100 feet for a key fob transmitter and standard receiver. For a long-range receiver the expected range is in the order of 300-400 feet. Our extended range radios can operate bidirectionally up to one mile.







Standard RF Transmitters

GAMA Electronics produces four standard configurations of RF transmitters. They are available as off-the-shelf products or can be customized for your own application. The basic models have 2, 3, 4, or 12 buttons.

Two button key fob style transmitters are for controls employing a single UP/DN, FWD/REV or similar bidirectional function. The most common actuator type used with this control is a permanent magnet DC (PMDC) motor. Rotation of a PMDC motor can be changed simply by reversing polarity of the power source. Several of our off-the-shelf products are capable of polarity reversal.

Three button key fob transmitters add stop function capability. Some systems, such as overhead door controls, use a momentary start/stop feature. This means that once the door is set in motion (either direction) another control action must take place to stop movement. It could be a limit switch, a safety switch, or in this case an operator initiated signal from the transmitter's third button.



Waterproof RF Transmitters

One of our newer RF transmitter designs features IP64 environmental protection. Using a silicon rubber shield to cover the keypad and electronic components, this transmitter is protected from dust intrusion and water (splashing from any direction). It operates in the 340MHz band using OOP keying and is powered by a 12V A23 battery having an expected life of approximately 6 months with normal usage. Buttons are backlit with energy efficient LEDs. This transmitter is compatible with GAMA Electronics standard and long-range 340MHz receivers. May be programmed for up to twelve unique command messages including on/off. One example of a typical application is four bidirectional actuators plus a master.

This product is a non-stock item, only available as a custom component for OEM applications at this time. The example shown is one of many packaging options available. Our expert electrical and mechanical engineering team will be glad to help you design a custom enclosure, branded to your specs, or integrated into your existing equipment.




Touchscreen RF Transmitters

Another new addition to the family is our touchscreen transmitter. Still in development, this very capable unit operates in the 340 MHz UHF band, using our own trusted OOK messaging protocol. The 320x240 pixel resolution screen measures 1.75x2.3 inches and displays 65,768 colors. The screen is recessed for protection. Expect up to 15 hrs continuous operation on two AAA batteries. A single tactile switch turns the unit on and off.

Since there are no hardware function switches, other than the on-off button, the programmability of this transmitter is practically unlimited. With ample memory already in place, the number of HMI elements easily exceeds the requirements of most receivers. On power up, the unit displays a "splash screen" which can be customized with your company's logo and other information, all in full color. Our talented staff is ready to create the splash screen and custom HMI elements (graphic buttons and other touch sensitive objects) that will clearly convey your brand and set your product apart from the rest.

This product will be produced as a non-stock item, only available as a custom component for OEM applications. The example shown is a prototype unit which will closely resemble the production models. Packaging options will be limited due to the form factor of the screen which is the key component of the unit. Our expert team will be glad to help you with branding and programming to your requirements.