Subwoofer Protection Circuit

The home audio amplifiers such as subwoofer amplifier in our home audio system is usually powerful. The output of these amplifiers usually connected to a large power loudspeaker such as subwoofer. When we activates the power to the amplifier, the loudspeaker works with annoying "TTAP" sound and this will damage your loudspeaker. So this circuit keep the situation clear when you power up your home theater. It allows the sound to fade in to the speaker by activating a relay.

Design and Test Stripboard Projects Using LochMaster

Loch master is yet another tool from ABACOM, the software provider who gave Sprint-Layout, sPlan, Sprint Layout, Frontdesigner, Profilab and many other tools for design and simulation of electronic circuits. Lochmaster is basically a developers tool for strip board projects. The latest version available for download is Lochmaster 3.0

What makes this unique?

Battery Powered Soldering Iron

As we know, traditional soldering irons uses mains ac supply to get heated but this will be annoying when we want to use it in the absence of mains supply. Here is a simple inexpensive circuit which we can call it as a inverter for normal soldering iron (25W, 30W, 35W). The circuit can drive the soldering iron in the absence of power supply from mains. This cold soldering iron circuit uses eight transistors and few resistors and capacitors. The battery should be a 12 Volt 7Ah.

Data Acquisition Systems- Checklist

This post will give you a basic idea of Data Acquisition system and the daq modules that used for acquiring data, processing data, converting, transmitting and etc.
Data acquisition (DAQ) is the most important task for a system that involves the processing of signals. Collecting the correct data and analyzing it correctly is critical as its  application fall under many complex applications in health-care, automation, control systems and more. DAQ systems need to acquire data to test a system, then analyze it and give feedback signal to the system.

Temperature Controller For PC

 Click here to read best computer temperature control methods

Our computer may often heated up due to long use or the hot climate, temperature controllers are necessary.  You need to do a temperature measurement to ensure that the computer is work within the allowed range. To reduce pc temperature, here is circuit diagram of a simple temperature controller for your personal computer (PC) based on a temperature sensor LM35 and a comparator CA3140. The circuit turns off the PC when the temperature of the computer increases beyond a particular, optimum temperature value. This avoids overheating of some integrated chips (IC) that may not be able to dissipate heat fast enough.

How to Identify Failed Capacitor on Circuit Boards

This post will give a little bit of idea, how to identify a leaked / Bad capacitor that soldered on a circuit board by visual inspection. This might help you in checking capacitor problems on motherboards and other circuit boards.

The most common method of identifying a failed electrolytic capacitor is by visual inspection. Because we cant desolder all the capacitors and test it using multimeter right? So the below symptoms may be expected to inspect on the electrolytic capacitors within the board.

Ultracapacitors Vs Batteries

This post will explain the advantages and disadvantages of ordinary lead-acid battery and the new age Ultracapacitors.

Most of our vehicles are fitted with lead-acid battery to meet intermittent loads to driver such as horn, turn indicators, brake light etc. The battery life is about two years if maintained properly. After the it's life is over we have to replace it by the same one usually costly one. If not, the driver may have compromise the safty features.