This is a design circuit for color BAR generator circuit. The circuit (see Color bar Schematic.jpg)it is constituted by AT90s2313 running at 17.734475 MHz (over clocked) and one, 5 bits DA converter (R2R-ladder) with 10 resistors. This is the figure of the circuit;
Program the MCU with colour_bar_gen.hex that its included in colour_bar_gen.zip file, connect it on composite video connector (or scart adapter) of your TV, power-on the circuit and you will see on TV, 6 vertical bars, 4 in color, 1 white and 1 black.
Partlist
1 x AT90s2313
1 x 17.734475Mhz crystal
2 x 22 pF condensator
6 x 1 kOhm resistor
4 x 500 Ohm resistor
