led-level

In general, analogue pointer in- struments are used for level indicators. Another method of indicating amplitudes and power is to use LED`s. The advantages of this system include higher resistance to shock, better legibility from greater distances and the fact that the response time is unaffected by the mech- anical time-constant of a conventional meter. Apart from a practical level meter additional circuits are discussed. The most important of these is a simple overload indicator.