Mega electronics lv202e ultra violet exposure unit with timer mega electronics 300 001 this lv202e small uv exposure unit from mega electronics has been designed for use in the preparation of photo resist circuit boards what the unit does 11 artwork consisting of opaque transfers on translucent drafting film is placed on the glass screen and the photo sensitive material is placed on top the lid incorporates a foam pad which exerts an even pressure to hold the artwork and photo board in