Engineering, Polytechnic and Vocational Training Equipment-> Embedded Control Interface Modules

1 [2] 3 [«Back ||Next »]   Click to Enlarge SERIAL- 3 WIRE - 12 BIT ADC INTERFACE MODULE. MODEL IBL-EBS-8 Most of the real world applications require analog signals as inputs. The analog inputs can be from temperature, pressure, flow, level, sound, displacement etc from respective transducers after proper signal conditioning. The signals so conditioned need to be connected to a controller for data logging. In order to perform this task, varieties of analog to digital converters are available. The PIC controllers need specialized converters in terms of hardware. These are classified as 3,4 or 5-wire ADC data transmission interfaces. The serial interface module offered is an 8 channel,12 bit ADC module. The maximum input for this is +4.8V DC only. This works on the principle of successive approximation. The conversion rate is approximately 6-10 uSec. This module has an additional precision reference level hardware to select quantization that is needed for precision logging. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. See Enlarge Click to Enlarge SERIAL- 3 WIRE - 12 BIT ADC INTERFACE MODULE. MODEL IBL-EBS-9 This ADC module is same as the one above. The only difference is the maximum analog input for this is ?10V DC. The special hardware of this ADC has capabilities to accept analog input signals beyond the supply voltage, which is +5V DC. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. See Enlarge Click to Enlarge PWM DIGITAL TO ANALOG CONVERTER EXPERIMENTAL MODULE. MODEL IBL-EBS-10 Digital to analog converter is just the opposite of ADC. DAC accepts binary value and converts to analog output. This makes use of suitable Microcontroller for performing this task. The duty cycle of a pulse train generated by the controller decides the analog output voltage when followed by a charging discharging hardware. This hardware does not use any conventional DAC. PWM is one other way to design DAC. This controller has the ability to change the duty cycle by appropriately setting the 8 bit data, hence it controls the DAC output. It is possible to set the output voltage in the range of 0 to 5 V DC in this experimental module. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. See Enlarge Click to Enlarge R ?2R LADDER NETWORK DAC EXPERIMENTAL MODULE. MODEL IBL-EBS-11 This DAC makes use of R-2R ladder network using precision resistor chain. Using this method, it would be possible to set the output voltage in the range of 0 to 5V DC. The output of this is suitably buffered to allow interfacing with following electronics hardware. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. See Enlarge Click to Enlarge 12 BIT, 3 WIRE SERIAL DAC EXPERIMENTAL MODULE. MODEL IBL-EBS-12 This is a 12 bit serial DAC experimental module. This makes use of 3 wire serial interface with the PIC controller. The output can be set in the range of 0 to + 5V DC depending on the Vref settings. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. See Enlarge Click to Enlarge DIGITAL POTENTIOMETER INTERFACE MODULE. MODEL IBL-EBS-13 This is an 8 bit, 3 wire Serial Peripheral Interface (SPI) digital potentiometer experimental module. This module has two DPs integrated in the same module. This is made of semiconductor device instead of a conventional wiper mechanism. The principle of a potentiometer however remains the same. The resistance of this pot is 1K?. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the VR latch. Resistor terminals A, B, W has no limitations on polarity with respect to each other. Each variable resistor offers a completely programmable value of resistance, between the A-terminal and the wiper or the B terminal and the wiper. In short this is a programmable variable resistor. You must use this potentiometer as a control signal generator only. This should not be used in power systems. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. This finds extensive applications in the field of a. Power supply output voltage adjustment b. Automatic gain control c. Volume control and panning d. Programmable filters, delays etc. See Enlarge Click to Enlarge INFRARED TRANSMITTER AND RECEIVER INTERFACE MODULE. MODEL IBL-EBS-14 The infrared transmitter is intended to convert the modulated light into digital signals. Using this technique, it is possible to transmit and receive the data. The firmware within the controller can then be programmed to accomplish a defined task. The most common task that is frequently used is, in remote control hand held device in our TV receiver. However this concept can be utilized to operate several appliances and devices. The necessary software for any specific device must be written by you and embed in the controller, before it becomes operational. This interface module comes in two parts, a Transmitter hardware and a receiver hardware. This transmitter sends a series of pulses in a coded fashion and is received at the receiver. The data is sent in the form of a packet of 12 bit data along with button code. The data to be transmitted is first modulated with precise time slots at the transmitter, and then demodulated at the receiver. The experimental module is intended to understand how these are taking place, and study rudiments of these techniques. In order to make the experiment more flexible, it is better to use the 4 X 4 matrix push button interface also as part of this interface. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. See Enlarge Click to Enlarge WIRELESS RADIO TRANSMITTER UNIT (RTU) INTERFACE MODULE. MODEL IBL-EBS-15 This is a Remote Control Radio Transmitter and Receiver Unit (RTUs) interface module. This is a RF interface module. This works on the principle of modulation. The data (message) is superimposed on a carrier on the radio wave, known as carrier wave. Amplitude modulation is used in this module. This AM radio transmitter operates at UHF frequencies in the range of 475MHz. The maximum range of transmission is restricted to 100 meters. The range of transmission is restricted to 100 meters, due to local regulations. The baud-rate of transmission and reception is upto 2400 BPS. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended. See Enlarge Click to Enlarge SINGLE WIRE TEMPERATURE SENSOR INTERFACE MODULE. MODEL IBL-EBS-16 This is a single wire temperature interface module. This is a specialized temperature sensor, in the sense, this sensor has built in ROM, a unique serial number signature, scratch pad RAM. Power for reading, writing, and performing temperature conversions can be derived from the data line itself with no need for an external power source. The transmission of data to and from the sensor follows strict communication protocols. The communication with the controllers is on a single wire. The controller which is in communication with the sensor reads the current data from the scratch pad non volatile memory and saves in the controller?s memory. The process of reading the sensor must be accomplished at regular intervals to detect the current temperature. It can measure temperatures in the range of 0 to 1000C in increments of 0.50. Each temperature sensor contains a unique silicon serial number, multiple temperature sensors can exist on the same 1?Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings, equipment or machinery, and in process monitoring and control. See Enlarge Click to Enlarge PROXIMITY SENOR INTERFACE MODULES. MODEL IBL-EBS-17 Proximity by the very name, suggests that an object is detected or not detected or decides how close the collision object is near the transmitter. This is done with Infra Red detection by using the principle of detecting the bounced light. The other method is by using Ultrasonic ranging. This works on the principle of detecting the reflected sound signals. However the built in controller must decide what action to take place, if detected. For this purpose, two distinct interface modules are designed. Using these interfaces, the student experiments how these devices function and logs the reflected signal on to a controller. The software and the hardware together form an embedded system. The applications of these depend on the ingenuity of the student. However the interface modules provide a means to understand these underlying principles of interfacing. The experimental modules by themselves do not offer any object-oriented actions. See Enlarge Click to Enlarge TWO AXIS INFRARED INTERFACE MODULE. MODEL IBL-EBS-18 This is an interesting IR interface module. This works on the principle of detecting the bounced light. The intensity of bounced light varies depending on the reflecting surface. The assumption is that emitted light follows the rectilinear propagation of light theory. This interface module has two sensors strategically placed to avoid collision with distance gauge. The distance measurement is by counting the number of reflected signals in comparison with the emitted count. Thus the distance can be gauged. While it is not possible to measure the actual distance, it can display the distance in 3 levels. Ie; far from the transmitter, near the transmitter or close to the transmitter by 3 different coloured LEDs. This can be approximated as the reflecting object to the left, center or right of the transmitter. The built in controller does the function of ranging, and indicating the approaching object. This is a good experimental tool to study the direction control of a simple ROBOT. See Enlarge Click to Enlarge ULTRASONIC INTERFACE MODULE. MODEL IBL-EBS-19 This interface is same as the above, except the sound is used as the medium for detection. The distance of ranging is done by a concept called as Time of flight. Time of flight is the time taken from the transmitter sending its PING, to the receiver detecting its ECHO. The transmitter is a speaker and the receiver is a microphone. Since the reflected sound is composed of several noises generated by the surrounding articles and people etc, certain amount of filtering is essential when compared with the transmitted signals. However this is very unique to the place where this interface module is located. Hence a filed adjustment is always essential. These are to be further processed by suitable amplifiers and then given as logged signal to the controller. This is a good interface to make study in the context of embedded control system. See Enlarge Click to Enlarge H-BRIDGE DC MOTOR INTERFACE MODULE. MODEL IBL-EBS-20 This is a DC motor controller. The controller is programmed to change the direction of rotation. The change of direction is controlled by a switch. The controller is programmed to switch the direction. This interface module highlights what is an H-Bridge configuration is all about. An external power supply 12V DC @250mA is required or power supply Model SP512 is recommended. See Enlarge Click to Enlarge ACCESS CONTROL INTERFACE MODULE. MODEL IBL-EBS-21 This interface provides you a means to understand and program a control required to enter any restricted area. This is called as gaining an access to a restricted area of a building or a department in an industrial setup. These are very common in multistoreged apartment blocks or office complexes. The access can be gained only by using password. This interface module essentially consists of a numeric keypad, with access control keys. On successful entry of the password, an electronic lock opens the simulated door. The access control will be disabled once the door is closed, or when against a specific time interval is elapsed. Since this contains all the necessary hardware interfaces, several of your schemes can be experimented. See Enlarge Click to Enlarge SPEECH PROCESSOR INTERFACE MODULE. MODEL IBL-EBS-22 This speech processor has 16 seconds of speech memorizing capabilities. Several smaller messages can also be recorded to remember short messages. In order the accomplish this the controller has a push switch S3, which when pressed enables the processor to remember the speech. An LED indicates that the processor is in record mode. By pressing another switch S2 the recording stops. To listen press Switch S1 and S2 together. An LED indicates the finish of reading the prerecorded message. The student experiments in this module to study how the controller is a handle all these events. This has a built-in speaker and a microphone. See Enlarge 1 [2] 3 [«Back ||Next »] Go to Top