Ludvig
Junior Member level 2

hobby uv eraser
Hi
Tried to erase a eprom 27c64 trough the window with UV-light from a "sun-lamp". The lightsource works well to make PCB with photores. Distans from lamp 25 cm. Time 1 hour. BUT NOTHING HAPPENS IN THE MEMORY. Its still programmed with old info instead of all High or all Low.
Whats wrong????
Rgds
Ludvig
Hi
Tried to erase a eprom 27c64 trough the window with UV-light from a "sun-lamp". The lightsource works well to make PCB with photores. Distans from lamp 25 cm. Time 1 hour. BUT NOTHING HAPPENS IN THE MEMORY. Its still programmed with old info instead of all High or all Low.
Whats wrong????
Rgds
Ludvig