This is so called persistence of vision when the perceptual processes of the retina of the human eye retains an image for a brief moment. Such inertia causes an illusion of motion rather separate frames displayed in quick succession. So this illusion technique can be used in many areas. Probably you are avare about rotating clock projects so why not to put similar technique in bicycle tire and look cool in the dark.

Raphaël Assénat have been developing a rotating LED bar on bicycle wheel for quite long time and came up with several versions of project. The newest is capable to read RPM of wheel and display value with LEDs. Also Display scan rate is fixed what allows to display smoothly at any rotating speed.

Raph has designed this board for NES/SNES controllers to USB, but it found place in many more projects due to its small size and easy to use.

This board is only 27.5×17.7mm size and is equipped with Atmega8 microcontroller. Circuit is already adapted for Firmware-Only USB Driver from Objective development including 12MHz resonator. Also there are several I/O pins available for custom programming. Because board it self is double sided, there is a place for SMD voltage regulator. Check out following projects where tiny board was used:

• X2Wii: N64, SNES or NES Gamepad to Gamecube/Wii adapter

• USBTenki: USB-connected temperature, humidity and pressure sensors.

• Infra-red receiver for Kenwood keyboard

• Gamecube/Nintendo 64 controller to USB adapter

• Four NES and/or SNES controllers to USB adapter

• Atari style joystick/controller to USB adapter

Board is available for download as GERBER files.

There are many time servers around the world that provide reliable time by using NTP (Network Time protocol). Everyone can connect to these serves and receive exact time via this simple protocol. Read more about how does it work in http://www.pool.ntp.org/.

Guido Socher from tuxgraphics.org has built nice simple NTP client that can request for time packets from server and display this data on LCD.

He used one of his AVR ethernet boards where simple server application allows easily configure clock settings like NTP server address, time offset, Clock address and more. The web server has also a second page where current time is displayed – the same as on LCD. Author provides ideas on how to build clock, ad even provides source code, but if you just want to have this clock on your table really fast on then buy a kit from http://shop.tuxgraphics.org/ and support Guido for his nice ideas.

This is nice tiny project that RC hobbyist may find useful. Mixer takes teo servo control signals and provides the sum and differential on two output channels. It can be used to control two servos of V tailed airplane or any other vehicle which has differential driving system.

V-Tail mixer uses Attiny13 AVR microcontroller and just few elements. So it is lightweight that makes it ideal for modeling. It’s other features are:

• Compatible with standard servo pulses (1ms…2ms);

• High 1200points resolution;
• Two Futaba standard servo input and output connectors;
• Selectable Fail-safe function (middle servo position or no output servo pulse);
• Small size: 40mm x 15mm x 6mm;

Assembly source code is available for download and compile.

Are you tired of LCD TV’s around you in public place, or restaurant. Tired of advertisements while you want to have peaceful time. Didn’t you think how good it would be to have magic remote control that could turn those annoying screens off. TV-B-Gone kit might be just what you need.

This fantastic remote can turn off almost all popular TV’s including latest plazma. Thanks to 4 IR LEDs used, distance may reach more than 100ft. The device uses Attiny85V microcontroller for storing 50 most common codes. You can download project files or buy a kit, and this way support author for nice ideas.