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Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

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  1. M

    Speed and reliability in wireless network

    After reading countless of articles about internet protocols, I am in the process of rolling my own wireless one between microcontrollers in which one acts as a master and the remaining as slaves. The wireless devices I use is HM-TRP configured at 38400 baud and connected to the UART of each...
  2. S

    Help: understanding scanning cards data through the air

    Hey Guys, It would be amazing if anyone has any idea of how does'e it happens? I have heard in my company that the manager installed a new system to read my employee card in my packet from the ceiling, and i wanna know how? What does'e this device do that it can read something so far away...
  3. E

    USB data triggered relay

    Hi, I have a usb symbol barcode scanner that I want to trigger a 5v relay when data (barcode reads) pass through. I want to be able to intercept the information without interfering with the normal connection and operation of the scanner and without ongoing background software on the intended...

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