Electronics

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Condenser Microphone

Condenser Mic You might know that Condenser means Capacitor, the electronic component which stores electrical energy in the form of electrostatic field. As the name indicates the condenser microphone uses a capacitor to convert sound (pressure variations) to electrical signals. Hence it is also called Electrostatic Microphone. We all know that a capacitance will be created when two parallel plate conductors are separated by a distance. The created capacitance will be directly proportional to the area of the plates and inversely...

September 15, 2013By Ligo GeorgeElectronics, SensorsCondenser Mic, Mic, Microphone4 CommentsRead more...

ASK RF Modules - Trasmitter and Receiver

Wireless Transmitter and Receiver using ASK RF Module

A wireless radio frequency (RF) transmitter and receiver can be easily made using HT12D Decoder, HT12E Encoder and ASK RF Module. Wireless transmission can be done by using 433Mhz or 315MHz ASK RF Transmitter and Receiver modules. In these modules digital data is represented by different amplitudes of the carrier wave, hence this modulation is known as Amplitude Shift Keying (ASK). Radio Frequency (RF) transmission is more strong and reliable than Infrared (IR) transmission due to following reasons : Radio...

June 23, 2013By Ligo GeorgeElectronicsASK, RF161 CommentsRead more...

HT12D Decoder IC for Remote Control Systems

HT12D is a 212 series decoder IC (Integrated Circuit) for remote control applications manufactured by Holtek. It is commonly used for radio frequency (RF) wireless applications. By using the paired HT12E encoder and HT12D decoder we can transmit 12 bits of parallel data serially. HT12D simply converts serial data to its input (may be received through RF receiver) to 12 bit parallel data. These 12 bit parallel data is divided in to 8 address bits and 4 data bits. Using...

June 16, 2013By Ligo GeorgeElectronics, ICHT12D5 CommentsRead more...

HT12E Encoder IC for Remote Control Systems

HT12E is a 212 series encoder IC (Integrated Circuit) for remote control applications. It is commonly used for radio frequency (RF) applications. By using the paired HT12E encoder and HT12D decoder we can easily transmit and receive 12 bits of parallel data serially. HT12E simply converts 12 bit parallel data in to serial output which can be transmitted through a RF transmitter. These 12 bit parallel data is divided in to 8 address bits and 4 data bits. By using...

June 12, 2013By Ligo GeorgeElectronics, ICHT12E11 CommentsRead more...

IR Remote Control for Home Appliances

IR Remote Control for controlling home appliances can be easily made using Decade Counter CD4017, 555 Timer and TSOP1738 infrared receiver. By using this circuit you can easily control your home appliances using your TV, DVD Player remote control or using a remote control circuit described here. Remote Control Receiver Circuit Diagram IR Remote Control for Home Appliances 2nd and 1st pins of TSOP1738 are used to give power, Vcc and Gnd respectively. 100Ω resistor and 33μF capacitor is to suppress power supply...

June 4, 2013By Abhay Bajpai555 Circuits, Electronics, Hobby Circuits555, CD4017, TSOP173897 CommentsRead more...

IR Transmitter and Receiver using 555 Timer and TSOP1738

IR Transmitter and Receiver pair can be easily made using 555 Timer, IR LED and TSOP1738 IR Receiver. This can be used for remote controls, burglar alarms etc. TSOP1738 is a very commonly used IR receiver for PCM remote control systems. It has only 3 pins, Vcc, GND and Output. It can be powered using a 5V power supply and its active low output can be directly connected to a microcontroller or microprocessor. It has high immunity against ambient light...

June 1, 2013By Ligo George555 Circuits, Electronics555, IR, TSOP173827 CommentsRead more...

TSOP1738 – Receiver for IR Remote Control Systems

TSOP1738 TSOP17XX is a commonly used IR receiver for Infrared PCM remote control systems. It is used in TVs, DVD Players, Burglar Alarms etc. This component is built with PIN Diode, Preamplifier and internal filter for PCM (Pulse Code Modulation) frequency and its epoxy package is designed as an IR filter. These are available with different carrier frequencies out of which TSOP1738 is very common whose carrier frequency is 38KHz. The output of TSOP17XX receivers can be directly connected to a...

May 31, 2013By Ligo GeorgeElectronics, ICTSOP17383 CommentsRead more...

FM Generation using 555 Timer

In communication systems, Frequency Modulation (FM) is the process in which information (message signal) is transmitted over a carrier wave by varying its instantaneous frequency. The difference between instantaneous frequency and central frequency of the carrier will be directly proportional to the instantaneous value of the amplitude of message signal. 555 Timer wired in Astable Mode can be used for generating Frequency Modulated (FM) waves. Please read the article Astable Multivibrator using 555 Timer for more details about the circuit. In astable multivibrator we don't...

May 20, 2013By Ligo George555 Circuits, Electronics555, FM27 CommentsRead more...