Tech News

Human Skin as a Touch-Screen Interface

The mobile industry started their journey with bulky handsets and huge keypads. With emerging technologies they were able to reduce the size and bring in more features. All this has been replaced by touch-screens and smart phones, with better user interface, and great features. As a next step to this evolution, here come smart phones […]

Tech News

3-D Printer Technology Helps Build Artificial Blood Vessels

Doctors have been successful in replacing dead intestines and tracheas, designed by tissue engineers. But, the same process on larger organs has been a little slow as they could not design blood vessels like capillaries that deliver the wanted nutrients to the other tissues. If the nutrient supply is stopped or cut-off at intervals, the

Tech News

Wi-fi Technology Helps in Analyzing Patients’Breathing

Researchers from the University of Utah were successful in making a wi-fi device that could detect and analyze breathing patterns. This device will not only pave way for cheap and easy breath monitoring systems, but will also help doctors to get a faster and more efficient analysis of patients suffering from breathing problems like sleep

Tech News

Heat Hack – A New Method to Steal ATM Pin Codes

  A team of UC San Diego security researchers presented a paper on how your Automatic Teller Machine (ATM) pin code can be stolen using the heat that our fingers leave behind. With the help of a digital infrared camera, the person immediately following you can know the keys you pushed, with 80% accuracy. Frightened?

Radio Circuits

AM radio circuit.

AM radio circuit using TDA1572. The circuit shown below is of a high performance AM receiver designed based on the TDA1572 IC from Philips. The TDA1572 is an integrated AM receiver circuit that has all essential circuitries like RF amplifier, mixer, IF amplifier, AGC circuit, signal strength indicator driver, audio pre amplifier, controlled oscillator etc

Radio Circuits

FM receiver circuit

CXA1019 FM receiver circuit A high quality FM receiver circuit based on CXA1019 IC is shown here. CXA1019 is a bipolar silicon monolithic FM/AM radio receiver IC from Sony. Built in circuitries inside the CXA1019 include RF amplifier, mixer, oscillator, IF amplifier, quadrature detection circuit, tuning LED driver electronic volume control, detector etc. FM section

Audio Circuits

Digital volume control circuit

Digital volume control circuit. MAX5486. A two channel digital volume control circuit based on IC MAX5486 is shown here. MAX5486 is a 40K dual digital volume / balance controller that has a pushbutton interface. The IC has a built in bias voltage source that eliminated the need of an external circuitry for the same purpose

Amplifier Circuits

TDA2822 amplifier circuit

TDA2822 amplifier circuit ( BTL & Stereo ). TDA2822 is a monolithic integrated audio amplifier circuit that can be configured in stereo mode or bridge mode (BTL). The IC has low crossover distortion, low quiescent current and is available in 16 pin power DIP package. The TDA2822 can be operated from a supply voltage range

Inverters

PWM inverter circuit

250W PWM inverter circuit SG3524. A 250W PWM inverter circuit built around IC SG3524 is shown here. SG3524 is an integrated switching regulator circuit that has all essential circuitry required for making a switching regulator in single ended or push-pull mode. The built in circuitries inside the SG3524 include pulse width modulator, oscillator, voltage reference,

Amplifier Circuits, Audio Circuits

100W MOSFET power amplifier

100W MOSFET power amplifier. A 100W MOSFET power amplifier circuit based on IRFP240 and IRFP9240 MOSFETs is shown here. The amplifier operates from a +45/-45 V DC dual supply and can deliver 100 watt rms into an 8 ohm speaker and 160 watt rms into a 4 ohm speaker. This Hi-Fi amplifier circuit is suitable

Remote Circuits

5 channel radio remote control

TX-2B / RX / 2B  5 channel radio remote control. This article is about a simple 5 channel radio remote control circuit based on ICs TX-2B and RX-2B from Silan Semiconductors. TX-2B / RX-2B is a remote encoder decoder pair that can be used for remote control applications. TX-2B / RX-2B has five channels, wide

Audio Circuits

Multi-channel audio mixer circuit using LM3900

LM3900 multi-channel audio mixer. A simple multi-channel audio mixer circuit using LM3900 quad amplifier is given below. The circuit consists of 4 channel quad amplifier (LM3900). Two mic audio inputs and two direct line inputs are available in this circuit. By adding the same circuit parallel with this, you can increase the number of inputs

Tutorials

TeraHertz Transistors

Terahertz transistors are the new generation semiconductor transistors developed by Intel Corporation. The researchers in Intel had developed a new transistor structure that maintains Moore’s law and would lead them into the discovery of these high speed new generation transistors. The terahertz transistor basically has higher speed (in GHz), High power efficiency, and high heat

Industrial Circuits, Test & Measurement Circuits

Digital thermometer circuit

Digital thermometer circuit. CA3162, CA3161 & LM35. A simple digital thermometer circuit with out a micro controller and having a seven segment LED read out is shown here. The circuit is based on three ICs: CA3162, CA3161 and LM35. CA3162 is a monolithic analogue to digital (A/D) converter that has BCD output. The A/D converter

DIY FM transmitter
Radio Transmitters

Stereo FM transmitter

PLL Stereo FM transmitter circuit How cool will it be if you can create a gadget that can transmit audio from your phone to your home stereo wirelessly? That’s exactly what we tried with this project, we were trying to create an FM transmitter for home use. There are such gadgets available to buy in

101-Announcements

CircuitsToday Launches Forums and Crossed Ten Thousand Subscribers

Greetings to everyone 🙂 This is a day of celebration for everyone here at CircuitsToday. Today, we achieved a milestone of 10,000 daily E-mail subscribers. At this joyous moment, we are announcing the launch of  our new Forums – Community of Electronics Professionals,Students and Hobbyists. The community portal is divided into different sections with specific

Hypersonic Sound System technology
Guides

Hypersonic Sound Technology

Image Credit Hypersonic Sound (HSS) is one of the most revolutionary digital sound reproduction technologies of this century. It is considered one of the most innovative approaches to sound engineering. This technology was developed by American Technology Corporation. The biggest advantage of this technology is that it does not include any complex electronic circuits having

Security & Saftey

PIR Sensor Based Security System

The circuit of an inexpensive and highly secure electronic security system is explained below. This electronic security system can be used in banks and other high security areas. A normal electronic security system will have a transmitter and a receiver. The transmitter sends out an IR laser and this will be received by the receiver.

Tech News

‘Cling-Film’ Solar Cells – A New Revolution for Renewable Energy

Solar panels available nowadays pave way for great energy savings and better environmental protection (since the energy is renewable). But solar panels acquire a huge space to install and are really expensive. Only a few countries provide subsidies to build a domestic or industrial solar project. What if a solar film that is a thousand

Tech News

The World’s Largest Fusion Reactor

Since, 1932, researchers have been successful in combining hot fusion with nuclei. Till then the concept of cold fusion was used and did not produce any satisfactory results. The research in hot fusion is still continuing and they have been successful in providing danger-free, very good potential energy source without producing much wastes. Some of

Tech News

Magnetic Microprocessors Can Make High-End Computers in Future

We have already discussed different concepts of high-efficiency computers like Brain-like Computers, which is soon to become a reality. Two researchers at the University of California, Berkeley, Jeffrey Bokor and Brian Lambson are developing a new concept called “Magnetic Microprocessors”. According to them, this new concept would be so efficient that the energy consumed by them

Television Related

IC based TV transmitter circuit

TV transmitter circuit. A very simple and high quality TV transmitter circuit based on IC MC374 is shown in this article.MC1374 is an integrated TV modulator circuit that can be used in various TV transmitter applications. The MC1374 includes all necessary circuitries required for a TV modulator such as sound carrier oscillator, FM audio modulator,

Tech News

XREP – A Combination of Taser and Shotgun

  We have already discussed about StunRay Technology and its capability to substitute tasers and guns used in law enforcement. But, there are some limitations to the amount of damage you can do to the suspect if he is not in front of you. That is why tasers are considered more effective as it will

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