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As you know, Oppo now preparing to release its new flagship smartphone N3, periodically fueling interest for the upcoming announcement of the teaser images. Presentation of the device to be held on October 29, and while the company released a new teaser, which Oppo N3 like "peeking" from behind the scenes. However, this is not the most interesting: it can be seen next corner another device, which is virtually invisible, and consider what it is until you can not. Does this mean that at the same time with the Oppo N3 will be announced another novelty? In any case, regarding the second unit Oppo any data yet. But information about the Oppo N3 already enough. The device is rumored to be equipped with a 5.9-inch touch screen with a resolution of 1920 x 1080 pixels, built on a quad-core Qualcomm Snapdragon processor with a clock frequency of 805 GHz and 2.7 Adreno 420 GPU, equipped with 3 GB of RAM and runs on Android 4.4 KitKat. The most interesting feature of this model is t...

This circuit detects the correct closed condition of the left and right side bags in a motorcycle companion. The bag has two locks that you must close for protection. Bicolor LED Driver Uses Two Leads Circuit Diagram: When you push the two momentary SPDT (single-pole/double-throw) switches, they sense the correct closed bag. One bicolor red-and-green LED indicates the bag’s status, with the red color showing the open-bag condition. To illuminate the LEDs, you must reverse the polarity of the applied voltage to the LED to change the color (Table 1). Diodes D 1 and D 2 and resistor R 1 form a discrete OR gate. When either pushbutton switch connects to 12V, the voltage at Point A is positive with respect to Point B. Transistor Q 1 conducts, letting current illuminate the red LED. When neither switch connects to 12V, neither diode conducts. The base of Q 1 pulls low through R 1 and R 4 , indicating that the bags are closed. Thus, the green LED illuminates as current passes through it a...

How to Connect two or more transistors in parallel While making power electronic circuits, configuring the power output stage correctly becomes very crucial. These stages primarily may consist of power devices like the power transistors or MOSFETs. Using power transistors are more common due to the greater ease of  configuring them. However when higher outputs are desired, it becomes necessary to add more number of these devices together. And as per the rules, it becomes necessary to connect them in parallel. Though using transistors in electronic circuits is pretty easy, connecting them in parallel needs some attention due to the one significant drawback with transistor characteristics. As per transistor specs, the devices needs to be operated under reasonably cooler conditions and that's why we install heatsinks on them to maintain the above criterion. Moreover, transistors have the "bad habit" of conducting proportionately rising currents through them as they get heate...

We  can make a simple touch switch using only two inverter gates, two resistors, and two capacitors. The schematic diagram of the circuit is shown in the figure below. At power up, the output (of U1A) will be high, and the inverting output will be low because U1A gate will be triggered to ground level by C2. After triggered, the low level of U1A input is maintained by U1B output via R2. If we touch the pad at this condition, where the output is high, then the U1A input will go high because we “short” the voltage of C1 to the input pin, and the low level previously caused by low level of U1B output voltage connected via R2 can’t be maintained because our skin resistance is much lower than 10M. After U1A input goes high then U1A output will go low, and now U1B will go high to maintain high voltage level of U1A via R2, so we can release our finger without loosing the last state. Touching the pad again after we release our previous touching will toggle the output as the condition is re...