This module is intended to conduct input / output interface experiments. It has 8 SPDT switches connected as input and 8 LEDs as output port. The student learns how to input 8-bit data from an external hardware, and display the same on external 4 -bit LED port. Each BIT of input or output is identified as an independent port. At the time of project design or prototype development, this can be used as a development module, whenever I/O operation is to be performed. It helps in validating the designed program. An external power supply 5V DC @250mA is required or +5V DC power supply Model SP5 is recommended.
Specifications:
Relay works under the principle of Electro-magnetic induction. An electric current passing through a coil wound on soft iron core. The iron core is magnetized as long as the current flows through the coil. As a result of this, a spring activated metallic contactor, is attracted towards this iron core, causing a mechanical movement. This principle is used to our advantage. There are two important principles demonstrated in this device, namely CAUSE & EFFECT. A relay connects
two devices working in different electrical conditions. I.e. mechanically connected and electrically isolated. For example: A digital system works at 5V DC and a fan works with 230V AC. Because the current flowing through a coil from a digital system, operating at 5V DC energizes the iron core; there is an effect of movable arm of the relay shifting its initial position. These switches ON a 230V AC operated bulb. The function of a Relay module is to show how a Microprocessor program can operate the relays and actuate high power devices. Some of the devices that can be actuated are like 230V AC lamps, blowers, contactors, fans, solenoids etc., which require 230 V AC supply for energisation. There are two relays placed on this module, which can be programmed by the Microprocessor either for ON or OFF condition. Each relay is housed in a transparent enclosure, to enable a student to see the movement of movable arm of the relay, while it gets actuated. The student is benefited by observing this phenomena.
The solid state relay module is similar to relay module. In this module a solid state device is used to turn ON/OFF the external 230V AC lamp, or a motor. There are two solid state relays placed on this module. The control signal required to open or close the gate of the device is to be provided by the external digital system. A Microprocessor trainer can be used for control.
This is used to show & design how an external keyboard can be interfaced to the PIC controller, While designing dedicated keypads. The keyboard has 16 keys placed in 4x4 array. This trainer provides a means to understand what is keyboard scanning, and how to achieve this. The user has to write the operating program to show how a calculator or a dedicated keyboard is accessed, and programmed to perform, various input output
operations or, arithmetic functions like addition, subtraction, multiplication, division programs can be executed. This interface also is used to design any dedicated system keypad. For example, keyboard for microwave oven.
