Radio Shack RS-4000 installation manual Finding Constant and Ignition Power, Using Wire TAP-INS

Page 11

49-840in.fm Page 11 Thursday, August 19, 1999 10:47 AM

FINDING CONSTANT AND IGNITION POWER

Your system operates from 12 volts and draws up to 15 amps of current. In addition to constant 12 volts, the system needs a source of power that is on only when the ignition is on (usually referred to as ignition power).

Follow these steps to find constant and ignition power.

1.Locate the wire bundle going to your vehicle’s ignition switch.

2.There is a large red or striped red wire going to your ignition switch. With the ignition switch in the OFF position, touch one lead from a 12-volt test light or volt meter to a metal part of your vehi- cle. Use the other lead with a wire-piercing probe to probe the wire. Confirm that the light turns on or the meter indicates 12 volts.

3.Mark this wire with its function

(CONSTANT POWER).

4.Turn the ignition to ON. Probe for a wire under the dash that has 12 volts only when the ignition is on. Confirm this by turning the ignition on and off while probing each wire.

5.Mark this wire with its function

(IGNITION POWER).

USING WIRE TAP-INS

We recommend you use wire tap-ins to make all connections.

Notes:

•Because of the extreme tempera- tures that occur inside a vehicle, we recommend you never use black electrical tape to insulate a connection.

•If you choose to solder connec- tions, use heat-shrink tubing to insulate the connections.

•Do not strip either wire when using a wire tap-in.

1.Snap the tap-in’s grooved chan- nel over one of the wires.

2.Put the other wire in the other channel.

Need Help? Call 1-800-598-2527

11

Page 10 Page 12
Image 11
Page 10 Page 12
Contents Installation Manual RS-4000 Auto Security Alarm SystemIntroduction Time ChecklistAfter you complete this section Estimated Contents Status Indicator with Bracket and Grommet Before YOU Begin the InstallationUsing Wire Piercing Probe Adapters Type a Switch Test InstallationDetermining Your VEHICLE’S Power Door Lock Type Type C Switch TestFailed All Tests Determining Your VEHICLE’S Door Switch Power TypeType B Switch Test Finding the Starter Wire Finding Your VEHICLE’S Parking Lights Wire Using Wire TAP-INS Finding Constant and Ignition PowerMounting the Main Module Installing the Status IndicatorMounting and Connecting the Siren Mounting and Connecting the ANTI- Carjacking Switch Connecting to PowerConnecting the Starter Disable Module Connecting to the Parking Lights Connecting to Power Door LocksConnecting to the Door Switch Connecting Additional SensorsConnecting Accessory Devices Completing InstallationVolts Max Volts Min Source mA Load mA, Max SpecificationsMaster Wiring Diagram 49-840in.fm Page 19 Thursday, August 19, 1999 1047 AM RadioShack Division of Tandy Corporation Fort Worth, Texas

RS-4000 specifications

The Radio Shack RS-4000 is an iconic piece of technology that embodies the spirit of innovation in the consumer electronics industry during the late 20th century. Launched in the 1980s, this personal computer made a significant impact on the home computing landscape, appealing to hobbyists, educators, and early computer enthusiasts alike.

One of the standout features of the RS-4000 was its affordability, which made technology accessible to a broader audience. The computer was powered by a Zilog Z80 microprocessor, a popular choice at the time due to its reliable performance and efficiency. With a clock speed of 4 MHz, the RS-4000 provided basic computing capabilities that were sufficient for word processing, simple programming, and educational software.

The RS-4000 came with 64 KB of RAM, expandable up to 256 KB, allowing users to enhance the system’s performance as their needs grew. For data storage, the computer utilized an external cassette tape interface, which was a common method for saving and loading programs during that period. This tape system was ultimately replaced as technology progressed, but it represented a significant step forward in personal computing.

Another notable aspect of the Radio Shack RS-4000 was its comprehensive range of input and output options. The machine featured basic keyboard input, a built-in speaker for sound output, and compatibility with various peripherals, including printers and modems. Additionally, it provided both video output to standard television sets and the option for users to connect external monitors, bringing versatility to the display options.

The RS-4000 supported a variety of programming languages, including BASIC, which allowed users to delve into programming and develop their software applications. This capability contributed to the rise of a generation of computer coders and technology enthusiasts who would go on to shape the digital future.

In summary, the Radio Shack RS-4000 was more than just a computer; it was a catalyst for creativity and innovation during the formative years of personal computing. With its user-friendly design, expandability, and a growing library of software, the RS-4000 played a crucial role in helping individuals understand and embrace the digital age. Although technology has advanced significantly since its release, the legacy of the RS-4000 remains in the hearts of those who experienced it, marking a pivotal moment in the evolution of personal computers.
Top Page Image Contents