You can build your own Atmel ATmega16 microcontroller based LED clock. The open-source softwares like interactive printed circuit board (pcb) editor and schematic capture program/tool like gschem can be chosen for your design.
You can build your own repulsor-like LED flashlight that can be mounted on your hand palm comfortably. You can turn ‘ON’ this Gadget to produce brighter light as you move your hand back and forth. With this powerful LED flashlight mounted on your hand palm, you’ll look like an ‘Iron Man’ !!
Similar design as shared by a Carlitoscontraptions member can be seen here. The build uses six 5 mm and one 10 mm ultra bright LEDs connected in parallel fashion. The LEDs are fitted nicely into the seven holes in constructed metal disk. These LEDs are further connected in series to the potentiometer which in turn is connected to a regular resistor. The regular resistor is used to limit the current and set the appropriate voltage for the LEDs and the potentiometer determines the light intensity. You can determine the appropriate value for the resistor by using this LED calculator.
The end result will look like:
A video showing the repulsor beam can be seen below:
A radio clock or radio-controlled clock is a clock that is synchronized by a time code bit stream transmitted by a radio transmitter connected to a time standard such as an atomic clock. You can design your own radio-controlled clock using DCF77 atomic clock. To know about DCF77, it is strongly recommended to visit the official DCF77 web site:
Hours and minutes, or minutes and seconds are displayed, with a control button
EasyPIC development circuit board.
The equivalent circuit schematic can be obtained here, and the C language source code is freely obtained by clicking on the link DCF77 LED CLOCK C SOURCE CODE : just copy and paste it in the MikroC compiler.
Enide member shared an amazing project of designing one simple RGB color generator. With the power of PIC12F675 microcontroller you too can build your own circuit that generates many colors using a RGB LED. The basic concept of the project can be viewed here.
The working principle that governs this project is : “Two independent voltages are supplied to the circuit in order to select the color (Hue) and its intensity (Value)! ”
You can download the circuit schematic and firmware required for pic12F675. Moreover you can also obtain the complete list of components required to build your RGB generator from the post here.