Testing

49-2020.fm Page 12 Wednesday, August 18, 1999 2:57 PM

To test the siren detector, hold down the smoke alarm’s test button until its siren sounds. The indicator on the siren detector flashes briefly and the base sounds an alarm. Press CANCEL on the base to si- lence the base’s alarm.

Notes:

•You might have to hold down the smoke alarm’s test button for as long as 15 seconds. The siren detector has a delay function to help prevent false alarms.

•We suggest you perform this test once a week to be sure the siren detector operates properly.

49-2020, 49-2011, 49-2010 specifications

Radio Shack, a name synonymous with electronics retail, offered a variety of intriguing products that captivated hobbyists and tinkerers. Among these, the Radio Shack 49-2010, 49-2011, and 49-2020 models stand out for their unique features and capabilities.

The Radio Shack 49-2010 is a compact infrared remote control transmitter and receiver that allows users to send and receive commands wirelessly. This device operates at a frequency of 38 kHz, making it ideal for a variety of applications, from simple remote controls to complex control systems for robotics projects. One of its main features is its versatility; it can be programmed to control multiple devices using preset commands, enabling users to design custom remote systems. Additionally, the 49-2010 is equipped with an easy-to-read LED indicator that signifies operation status, making it user-friendly for beginners.

The 49-2011 model builds on the 49-2010 with enhanced functionality. This unit also utilizes infrared technology, but it introduces a broader range of programmable features and improved sensitivity. The 49-2011 can simultaneously control multiple devices, making it a fantastic choice for automation projects. It includes additional programming capabilities, allowing hobbyists to create more complex control setups. With its straightforward interface, users can easily configure it for various uses, including controlling appliances, lights, and even custom-built machinery.

The Radio Shack 49-2020 further advances the line with a focus on wireless communication. This model features a frequency-hopping spread spectrum technology, which significantly improves range and reliability. Unlike its predecessors, the 49-2020 is designed for use in environments with high electromagnetic interference, making it suitable for both indoor and outdoor applications. This robustness is complemented by enhanced battery efficiency, allowing for longer usage without frequent replacements.

In summary, the Radio Shack 49-2010, 49-2011, and 49-2020 provide a range of features catering to electronics enthusiasts and those engaged in DIY projects. From simple infrared remote controls to advanced wireless communication systems, each model brings forth various innovative technologies. These devices exemplify Radio Shack's commitment to empowering users with tools to explore their creativity in electronics and automation.