The LED distance warning sensor includes a HC-SR04 ultrasonic module connected to a PIC16F630 microcontroller. This simple circuit flashes the diode when an object is within 1 metre with the relevant rate of its distance; the closer the faster.
This Java application is to demonstrate how to control a tri-colour (RGB) LED from the internet. Tomcat servlet is running on a Raspberry Pi and the user can interfere with the Pi’s GPIO’s (General Purpose Input Output) from the web browser. A complete hardware and software setup is included in the write-up.
The task was to organize a messy hardware configuration which included the server, routers, switches and all sort of devices. My goal was to install all the hardware into a single server rack. To do that, all the wiring and network cabling had to be customized to suite the new setup.
Repairing tutorial of a faulty Acer S271HL monitor with flickering screen. Disassembly, diagnosis and component replacement…