??? 03/05/04 17:07 Read: times |
#66058 - RE: PS/2 Keyboard near Welding area. Responding to: ???'s previous message |
" Do I need to use isolation for K/B and LCD as well. Do I need separate supply for these devices and micro."
No. In any event the LCD does not isolation - I am sure it must be a few inches of control and data cable. And the K/B with its 2.5 feet cable also can do without any isolation. " RF interference to nearby welding going on." The welding arc IS the interfering source and not the other way round. "Do I need separate supply for these devices and micro." No. A common power supply that is adequately designed and built with proper interference suppressing measures, grounding etc would suffice for the MCU and all its related K/B , LCD etc. If you want to keep things simple just buy a GOOD switcher. Thats it. Incidentally I suppose you dont use a simple RC reset for the MCU ? Raghu |