LED Meter

LED Meter (Green color with Yellow & Red peak segments)

LED Meter is a handy utility module designed to show audio levels. Three color versions are available:

- green color with yellow-red peak segments.
- all blue color
- all yellow color

There are total 30 led segments, each one roughly corresponds to 1 dB of level, so it is 30 dB of measurement level available with this module.
The module has an input for the signal to be displayed, and its buffered copy is sent to the output for further processing, so no external splitter is needed.
Two trimmers are accessible via holes on the front panel: left trimmer adjusts brightness and right trimmer is used for the level adjustment. So the module can represent full scale signals ranging from 1 V to 12 V.
There is operation mode jumper on the back side. When the jumper is installed – bipolar operation is active, and when the jumper is removed – ordinary audio meter is active.

http://www.happynerding.com/category/led-meter/