Electromagnetic Interference: To control ON/OFF operation of ac devices we can use electromagnetic relay. This relay has both normally open and closed contacts. When a current is passed through the coil of the relay, the…
Stepper Motor Interface: A stepper motor is a digital motor. It can be driven by digital signal. Fig. 15.18 shows the typical 2 phase Stepper Motor Interface using 8255. Motor shown in the circuit has…
Transistor Buffer Circuit: The Fig. 15.12 shows the Transistor Buffer Circuit. In these Transistor Buffer Circuit, transistor is used as a switch. It can be switch ON or OFF with logic 0 or logic 1…
Types of LCD Displays: The Types of LCD Displays are one of the most fascinating material systems in nature, having properties of liquids as well as of a solid crystal. The terms liquid crystal refers…
18 Segment Display: The Fig. 15.5 shows the 18 Segment Display. They are used to display numbers and alphabets. Like 7-segment displays, 18 Segment Display are also interfaced through 8279 to the microprocessor. Here, instead…
BCD to 7 Segment Decoder using IC 7447: BCD to 7 Segment Decoder using IC 7447 are generally used as numerical indicators and consists of a number of LEDs arranged in seven segments as shown…
Sample and Hold Circuit: Four basic sample and hold circuit are shown in Fig. 14.141. In these circuits a JFET is used as switch. During the sampling time the JFET switch is turned on, and…
Sample and Hold IC: Sample and Hold IC - For accurate analog to digital conversion the analog input voltage should be held constant during the conversion cycle. If the analog input voltage changes by more…
IC 7109 Features: The IC 7109 Features are namely, IC 7109 is a 12-bit dual slope A/D converter. It has polarity and overrange bits. It has byte organized TTL compatible three-state outputs and UART handshake…
ADC0808 Pin Diagram: The ADC0808 Pin Diagram and ADC 0809 are monolithic CMOS devices with an 8-channel multiplexer. These devices are also designed to operate from common microprocessor control buses, with tri-state output latches driving…
