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Using Transistor as a Switch

Most of microcontrollers work within 5 volt environment and the I/O port can only handle current up to 20mA; therefore if we want to attach the microcontroller’s I/O port to different voltage level circuit or to drive devices with more than 20mA; we need to use the interface circuit. One of the popular method is to use the Bipolar Junction Transistor (BJT) or we just called it transistor in this tutorial. I ...

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Remote controlled switch using Atmega 328p

Ever dreamt of controlling an appliance like a CFL or a fan at your finger tips and thinking for a cheap solution? Well, then you are looking at the right instructable!! This instructable will provide you with a cheap and best possible solution to control your switch operated appliances through an existing IR remote using a simple electronic circuit which uses an Atmega-328 microcontroller. Step 1: Things y ...

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LCD/switch interface

Page 1 of 2 This board can directly connected to the STK 500 board or the ATTiny2313 ISP program board with a 10 pole flatcable on the 10 pin header of the STK500 and the 10 pin header of the LCD/Switch board. The display has 16*2 character positions and is Hitachi HD44780 compatible, and also has a LED backlight that can be switched on/off by a jumper. You can puchase the ATTiny2313 board at www.bizztronix ...

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Testing Device for DiSEqC-Switches using ATtiny13-20PI

This is my first AVR-project on this page. The DiSEqC-Tester allows to test DiSEqC-switches that uses 1.0 or 1.1 protocols. (DiSEqC-Switches with 2.0 and 2.1 protocol have backwards compatibility with 1.0 & 1.1 respectively and also may be tested). The device every second sends a DiSEqC-message that makes switch a DiSEqC-switch. Four LEDs are intended to show on/off state of ports of a DiSEqC-switch. Fe ...

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MEMtronics Receives Phase 2 Award for DARPA RF MEMS Switch Development – Company’s technology increases environmental robustness of wireless systems

(PRWEB) May 5, 2005 Part of the Harsh Environment Robust Micromechanical Technology (HERMIT) Program, the first phase of this contract recently culminated in the successful demonstration of a wafer-level packaging technology called “wafer-level microencapsulation.” This packaging scheme protects MEMS switches from the adverse effects of moisture and particles. The microfabricated packages have extremely low ...

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Airturn Launches Silent Foot Switch for its iPad Page Turner

Boulder, CO (PRWEB) June 07, 2011 AirTurn, Inc. is introducing the ATFS-2, a new silent foot switch designed to be the quietest consumer foot switch on the market today, as a companion to its BT-105 Bluetooth hands free page turner for the iPad and Bluetooth-equipped Mac and PC computers. The ATFS-2 features a proprietary "mechanism free" design, where there are no moving parts aside from the molded hinge. ...

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Dump Your Cable and Satellite TV; Switch to Digital TV

Sunnyvale, Calif. (PRWEB) October 20, 2008 In these turbulent, troubling economic times more than a few Americans are looking for ways to tighten the proverbial family budget belt and Retrevo - the matchmaking service for consumers and electronics - has a painless solution that can't be beat: dump your pricey cable or satellite TV subscription and switch to free digital TV. Retrevo's report is availabl ...

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