The Analog World Microcontrollers are capable of detecting binary signals: is the button pressed or not? These are digital signals. When a microcontroller is powered from five volts, it understands zero volts (0V) as a binary 0 and a five volts (5V) as a binary 1. The world however is not so simple and likes to use shades of gray. What if the signal is 2.72V? Is that a zero or a one? We often need to measure signals that vary; these are called analog signals. A 5V analog sensor may output 0.01V or 4.99V or anything inbetween. Luckily, nearly all microcontrollers have a device built into them that allows us to convert these voltages into values that we can use in a program to make a decision. What is the ADC? An Analog to Digital Converter (ADC) is a very useful feature that converts an analog voltage on a pin to a digital number. By converting from the analog world to the digital world, we can begin to use electronics to interface to the analog world around us. Not every p
Want to make everything wireless..??? Huh.!! Then u r at right place. There are many wireless technologies like ir,DTMF,rf etc of these IR and DTMF are covered in earlier posts. So now its time for radio frequency communication.. Dont be get puzzled In this post I will direct you how make simple RF remote.. So for making remote,components that you required are *HT121D *HT121E *RX TX MODULES *1.1M ohm resistor *55k ohm resistor Now its time to know about encoders and decoders.encoders is a thing which creates some data at transmitter end. Decode is opposite for those encoders it simply decode the data which has been transmitted by encoders..so from this we conclude that encoders should always lies at transmitting section and decoders lie at receiver section MAKING A TRANSMITTER: MAKING A RECEIVER: This is how rf MODULES looks
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