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Samsung has officially introduced the smartphone Galaxy A3 and A5, made ​​as stressed developers in the "full metal Unibody-body." New focus on young people and will go on sale in November. The cost of the devices has not yet been disclosed. Samsung Galaxy A5 is equipped with a 5-inch Super AMOLED display with a resolution of 1280 × 720 pixels, 4-core processor with 1.2 GHz, 13-megapixel primary and a 5-megapixel front camera, 2 GB of RAM and 16 GB of internal memory, microSD slot . The dimensions of the device are 139 × 70 × 6,7 mm, weight - 123 grams. The model runs Android 4.4 and is equipped with a battery capacity of 2300 mAh. The battery life, the Samsung Galaxy A5 did not specify. Galaxy A3 differs from the older "colleagues" reduced to 4.5-inch display with a resolution of 960 × 540 pixels, 8-megapixel main camera and half the amount of RAM. Sourced By : Makemoneyfreewithus

Transistor Checker Circuit Diagram. This simple circuit has helped me out on many occasions. It is able to check transistors, in the circuit, down to 40 ohms across the collector-base or base-emitter junctions. It can also check the output power transistors on amplifier circuits. Circuit operation is as follows. The 555 timer ( IC1 ) is set up as a 12hz multi vibrator. The output on pin 3 drives the 4027 flip-flop ( IC2). This flip-flop divides the input frequency by two and delivers complementary voltage outputs to pin 15 and 14. The outputs are connected to LED1 and LED2 through the current limiting resistor R3. Transistor Checker Circuit Diagram The LED's are arranged so that when the polarity across the circuit is one way only one LED will light and when the polarity reverses the other LED will light, therefore when no transistor is connected to the tester the LED's will alternately flash. The IC2 outputs are also connected to resistors R4 and R5 with the junction of these...

TP Vision company introduced an expanded line of Philips TV with a resolution of 4K Ultra HD, running the operating system Android. Philips 7900 Series - available 4K Ultra HD TVs that run on Android OS and have a double-sided backlit Ambilight. The second novelty, Philips 9100 series, equipped with powerful features to improve the quality of the image. Two new series offer expanded TP Vision in 4K Ultra HD TVs, which also includes recently introduced models Philips 8800 Series New TV series 7900 and 9100 . As the producer, all 4K Ultra HD TVs Philips Android-based certified by Google. Thus, their owners will be able to access the majority of applications, services and content store Google Play, adapted for use on TV, which significantly enriches the existing offer Philips Smart TV.

This circuit will illuminate a LED if one of your telephones is in use. It should work in all countries (Including UK) that have a standing line voltage above 48 Volts DC. Please note that it is illegal to make a physical permanent connection to your telephone line in some countries (this includes the UK and Ireland). If building this circuit it is advisable to use a plugin cord so that the unit can be unplugged should a fault occur. If in doubt consult either your telephone or cable operator. If all extension phones are on-hook and the line voltage is around 48 V, Q1 will conduct thus effectively shorting the gate of Q2 to its source, so it will be off and the LED will be disabled. Lifting the handset of any phone on the line causes the line voltage to drop to 5-15 V. The gate voltage of Q1, equal to some 6% of the line voltage, will then be too low and Q1 will be turned off. So Q2's gate is now biased at approximately 1/2 of the line voltage, Q2 turns on and the LED indicate...

This is a Simple Telephone In Use Indicator Circuit Diagram . With this circuit mounted in or near every phone in the house, it will allow users to know if the phone is being used and not to pick up the phone. When a phone is taken off hook, the voltage across the tip and ring terminals drops to 10 volts or less. This will cause the FET (2N4360) to turn on and also turn on the transistor (2N2222). When the transistor turns on it will allow current to flow through the LED and make it light. A blinking LED could be used to make the effect better.  Simple Telephone In Use Indicator Circuit Diagram  

Analog to Digital Converter (ADC): In this tutorial i will show how to convert analog values into digital, by using 887 (little bit differ with 877) , then display these digital value on LCD. The Analog-to-Digital Converter (ADC) allows conversion of an analog input signal to a 10-bit binary representation of that signal. This device uses analog inputs, which are multiplexed into a single sample and hold circuit. The output of the sample and hold is connected to the input of the converter. The converter generates a 10-bit binary result via successive approximation and stores the conversion result into the ADC result registers (ADRESL and ADRESH). The ADC voltage reference is software selectable to be either internally generated or externally supplied. ADC Configuration: When configuring and using the ADC the following functions must be considered: • Port configuration • Channel selection • ADC voltage reference selection • ADC conversion clock source • Interrupt control • Results forma...