Ferrite beads (L1 in the photo) filter high frequency power supply noise by converting it into a tiny amount of heat. Power supply noise can cause various problems for many parts, especially in analog audio and display circuits.
Ferrite beads are simple, but choosing one can be confusing because they’re not commonly used by hobbyists. Most designs will still work if you omit the ferrite bead(s), but beads are so cheap there’s no reason to sacrifice the added reliability they provide. We describe how we pick ferrite beads for our projects after the break.

A ferrite bead is rated…

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Forex Trading versus Spread Betting# An advantage of forex brokers is the platform flexibility in various trade platforms. A key advantage of dealing with a forex broker is the functionality of being able to place contingent orders (which we are led to believe will soon be available on some spread betting firms)# Dedicated FX services and forex companies offer you all the tools in one place, essential in such a volatile market including demo forex accounts, news and research focused on the FX market so it may pay to open accounts with forex brokers just to have access to their…

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