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ZAGG has released a new universal tablet wireless keyboard. If you want more comfortable typing experience for your tablet or smartphone, the Bluetooth keyboard may be able to meet your requirements.This is a practical Bluetooth wireless keyboard that measures 9-5/4 x 5-1/2 x 3/4 inches and weights 0.65 lbs. As we can see from the images, the Bluetooth keyboard features elegant and ergonomic design, and comes with island-style keys in order to provide a comfortable, more natural typing experience and fast typing speed. Moreover, the portable speaker has a versatile protective case that doubles as a tablet stand for convenient set up and portability. Apart from that, its long-lasting battery offers you up to three months of regular use between charges. The universal tablet wireless keyboard is priced at $69.99 USD.  

Many different types of wireless switch modules with a relay for switching AC power loads are commercially available. However, some applications require a short On or Off pulse, such as is provided by a momentary-action (pushbutton) switch. Here we describe a solution that simulates a pushbutton switch with a standard wireless switch. A supplementary circuit converts the switch module into a remotely controllable momentary action switch. In the supplementary circuit, S1 is the switching contact of the relay in the wireless switch module. This contact energises a 24-V power supply connected directly to the AC power outlet, consisting of a bridge rectifier (D1–D4) with a series resistor (R1), a series capacitor (C1), and a charging capacitor (C2). The two Zener diodes in the bridge rectifier (D1 and D2) limit the DC voltage on C2 to approximately 24 V.1 Momentary Action with a Wireless Switch Schematic When the wireless switch module closes con-tact S1, 24 VDC is applied to the coil...

Genius Mouse DX-BlueEye ECO is the world’s first wireless mouse without batteries for PC & Mac users. No battery? Yes, the secret is the use the of the built-in capacitor (gold capacitor) that replace the battery and can be used up to 100,000 times refill. According to Genius, all we need simply refill it for 3 minutes then the mouse can be used for a full day. With Genius Mouse DX-BlueEye ECO, it means we do not need extra money to purchase external battery pack and also preserve the environment. Genius Mouse DX-BlueEye ECO is using a frequency of 2.4 GHz and can be used within a maximum distance of 15 m and have a 800/1600 dpi. it will be sold with price of $ 39.99.

Anyone performing their own automobile tune-ups knows how important it is to know your engines speed. With this tachometer, you can measure your engines speed without any connections or annoying timing lights.      Wireless Auto Tachometer Circuit Diagram PC board layout and parts placement  Calibrate the unit as folows: Set up this circuit: Turn on the Tach and allow a few minutes for temperature stabilization. Set S2 to 4 cylinders and adjust R5 for a meter indication of 180 (1800 rpm). Set S2 to 6 cylinders and adjust R6 for a meter indication of 120 (1200 rpm). Set S2 to 8 cylinders and adjust R7 for a meter indication of 90 (900 rpm). To use the Tach, turn it on and let it sit for one minute to allow for temperature stabilization. Extend the antenna, select the right number of cylinders and hold the unit over the engine. If the reading is erratic or the needle jumps around, move the antenna closer to the ignition coil or spark plug wires. The unit draws power fr...

Hello folks, I am here with a simple and interesting arduino project, RF based wireless Message Transmitting system. By using this system you can feed the data to be transmitted serially to the transmitter from your PC. The project mainly consisting of a Transmitter and a  receiver section. Transmitter is made by Arduino Uno board and receiver is made by Arduino Mega2560. The communication between transmitter and receiver is through RF, Amplitude Shift Keying. (More about Binary Frequency shift keying )  This wireless transmitter and receiver pair operates in 433Mhz. Only one way of communication is possible through this system, the received message will be displayed on a 16x2 alpha-numeric liquid crystal display. The receiving section updates the display whenever a new message arrives from 433Mhz RF transmitter. Read More.....

This is a simple circuit that can power a light bulb without any wires, at a distance of almost 1 inch! This circuit acts as both, step up Voltage converter and also wireless electricity transmitter and receiver . This is a really easy project to do, and could be used in many ways if improved. So lets get to it! \