Problems with EMC and EMI, hidden but real ..

Many colleagues of engineering must have heard about such circuit interference with radio signals, calls conducted electromagnetic interference or "EMC" and radiated electromagnetic interference or "EMI", acronyms derived from the expressions in the English language. Since the beginning of the discovery of radio signals issuing this problem was already a bad derivative equipment with power via power grid, especially with the growth of its use from the Second World War.
In my professional life I witnessed several cases where EMC and EMI were great villains, such as in thermal printers. With the interference by EMC in equipment powered via mains and EMI in equipment to the battery. In current peak conditions for heating the driver circuit is susceptible to this type of interference noise generating circuit in the control system and in some cases stopping printing by external interference.
This is one of the less serious cases that have ever witnessed and thanks to pre analysis equipment in specialized laboratories telecommunications, I could see this effect and fix it.
I leave here my tip to colleagues, to that end in the case of Brazil Anatel regulates the majority of telecommunications and automation equipment to prevent breakdowns in increased risk of equipment such as aircraft and in the medical field.
Abroad also have the regularizadores organs like FCC (US and Canada), MRC (Australia) and many others.
I recommend to colleagues a search and if in doubt about which laws, resolutions and parameters meet always consult an expert because the risk is great in equipment designs with embedded electronics.
Success my dear!