hi all , i had found a very helpful thing for pple who used to maiantain CRT monitors

This project was born for repairing broken PC monitors. This allows to avoid using a computer while testing monitor patterns. The Tiny monitor tester uses ATTiny2313 AVR MCU running at 20MHz speed. Such speed allows running synchro H and V signals directly form MCU ports. Also circuit converts R,G,B signals to analog using simple R-2R resistor network.

Circuit can be viewd here