K4300


	K4300 Audio Spectrum Analyser Schematic - Velleman

Input & Power Supply Part
Filter Section A
Filter Section B
Multiplexer Section
A/D Converter Section
Display Section
Part List - Txt Format
PCB Silk layout - Filter PCB
PCB Silk layout - Multiplex PCB

Technical specifications

- 10 bands : 32, 64, 125, 250, 500, 1K, 2K, 4K, 8K, and 16K Hz.

- Range : 20db (10 LED's, 2db per LED).

- Line input : adjustable sensitivity from 100mV to 2V rms,

impedance 100K.

- Built in microphone amplifier : 40db gain,10K input impedance.

- Power supply : 2x9V transformer, or 12 to 15VDC.

- Current consumption : 0,75ADC max., 70mA in stand-by.

Note :

At writeing momennt the k4300 kit by velleman is no longer in produktion, causd by one of the IC no longer is made, the magic a/d converter and led driver IC U2067b

At the monment we are working very hard to redesign the very popular audio spectrum analyser, using more commen IC - Look under TZ4300